10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________________________________________ 

FORM 10-Q

_______________________________________________

(Mark One)
ý	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2019

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number 001-34385

(Exact Name of Registrant as Specified in Its Charter)

_______________________________________________

Maryland	26-2749336
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
1555 Peachtree Street, N.E., Suite 1800 Atlanta, Georgia	30309
(Address of Principal Executive Offices)	(Zip Code)

(404) 892-0896

(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:

Title of Each Class	Trading Symbol	Name of Each Exchange on Which Registered
Common Stock, par value $0.01 per share	IVR	New York Stock Exchange
7.75% Series A Cumulative Redeemable Preferred Stock	IVRpA	New York Stock Exchange
7.75% Fixed-to-Floating Series B Cumulative Redeemable Preferred Stock	IVRpB	New York Stock Exchange
7.50% Fixed-to-Floating Series C Cumulative Redeemable Preferred Stock	IVRpC	New York Stock Exchange

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ý    No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large Accelerated filer	ý	Accelerated filer	o
Non-Accelerated filer	o	Smaller reporting company	o
		Emerging growth company	o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  o    No  ý

As of April 30, 2019, there were 128,588,493 outstanding shares of common stock of Invesco Mortgage Capital Inc.

INVESCO MORTGAGE CAPITAL INC.

TABLE OF CONTENTS

		Page
PART I FINANCIAL INFORMATION		1
Item 1.	Financial Statements	1
	Unaudited Condensed Consolidated Balance Sheets as of March 31, 2019 and December 31, 2018	1
	Unaudited Condensed Consolidated Statements of Operations for the three months ended March 31, 2019 and 2018	2
	Unaudited Condensed Consolidated Statements of Comprehensive Income for the three months ended March 31, 2019 and 2018	3
	Unaudited Condensed Consolidated Statements of Equity for the three months ended March 31, 2019 and 2018	4
	Unaudited Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2019 and 2018	6
	Notes to Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	65
Item 4.	Controls and Procedures	68
PART II OTHER INFORMATION		69
Item 1.	Legal Proceedings	69
Item 1A.	Risk Factors	69
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	69
Item 3.	Defaults Upon Senior Securities	69
Item 4.	Mine Safety Disclosures	69
Item 5.	Other Information	69
Item 6.	Exhibits	71

PART I

ITEM 1. FINANCIAL STATEMENTS

INVESCO MORTGAGE CAPITAL INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	As of
$ in thousands except share amounts	March 31, 2019		December 31, 2018
ASSETS
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	21,127,598		17,396,642
Cash and cash equivalents	78,482		135,617
Restricted cash	5,025		—
Due from counterparties	13,000		13,500
Investment related receivable	70,789		66,598
Derivative assets, at fair value	26,580		15,089
Other assets	177,913		186,059
Total assets	21,499,387		17,813,505
LIABILITIES AND EQUITY
Liabilities:
Repurchase agreements	16,824,387		13,602,484
Secured loans	1,650,000		1,650,000
Derivative liabilities, at fair value	8,463		23,390
Dividends and distributions payable	60,433		49,578
Investment related payable	222,500		132,096
Accrued interest payable	47,100		37,620
Collateral held payable	2,273		18,083
Accounts payable and accrued expenses	2,384		1,694
Due to affiliate	10,133		11,863
Total liabilities	18,827,673		15,526,808
Commitments and contingencies (See Note 14):
Equity:
Preferred Stock, par value $0.01 per share; 50,000,000 shares authorized:
7.75% Series A Cumulative Redeemable Preferred Stock: 5,600,000 shares issued and outstanding ($140,000 aggregate liquidation preference)	135,356		135,356
7.75% Fixed-to-Floating Series B Cumulative Redeemable Preferred Stock: 6,200,000 shares issued and outstanding ($155,000 aggregate liquidation preference)	149,860		149,860
7.50% Fixed-to-Floating Series C Cumulative Redeemable Preferred Stock: 11,500,000 shares issued and outstanding ($287,500 aggregate liquidation preference)	278,108		278,108
Common Stock, par value $0.01 per share; 450,000,000 shares authorized; 128,267,497 and 111,584,996 shares issued and outstanding, respectively	1,282		1,115
Additional paid in capital	2,642,050		2,383,532
Accumulated other comprehensive income	277,182		220,813
Retained earnings (distributions in excess of earnings)	(812,124	)	(882,087	)
Total stockholders’ equity	2,671,714		2,286,697
Total liabilities and stockholders' equity	21,499,387		17,813,505

The accompanying notes are an integral part of these condensed consolidated financial statements.

1

INVESCO MORTGAGE CAPITAL INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

	Three Months Ended March 31,
$ in thousands, except share amounts	2019		2018
Interest Income
Mortgage-backed and credit risk transfer securities	185,492		149,003
Commercial and other loans	1,582		4,222
Total interest income	187,074		153,225
Interest Expense
Repurchase agreements	101,875		59,585
Secured loans	11,144		6,927
Exchangeable senior notes	—		1,621
Total interest expense	113,019		68,133
Net interest income	74,055		85,092
Other Income (loss)
Gain (loss) on investments, net	268,382		(160,370	)
Equity in earnings (losses) of unconsolidated ventures	692		896
Gain (loss) on derivative instruments, net	(201,460	)	133,367
Realized and unrealized credit derivative income (loss), net	7,884		3,165
Net loss on extinguishment of debt	—		(26	)
Other investment income (loss), net	1,029		3,102
Total other income (loss)	76,527		(19,866	)
Expenses
Management fee – related party	9,534		10,221
General and administrative	2,258		1,756
Total expenses	11,792		11,977
Net income	138,790		53,249
Net income attributable to non-controlling interest	—		671
Net income attributable to Invesco Mortgage Capital Inc.	138,790		52,578
Dividends to preferred stockholders	11,107		11,107
Net income attributable to common stockholders	127,683		41,471
Earnings per share:
Net income attributable to common stockholders
Basic	1.05		0.37
Diluted	1.05		0.37

The accompanying notes are an integral part of these condensed consolidated financial statements.

2

INVESCO MORTGAGE CAPITAL INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(Unaudited)

	Three Months Ended March 31,
$ in thousands	2019		2018
Net income	138,790		53,249
Other comprehensive income (loss):
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	52,349		(132,317	)
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	10,147		9,237
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	(5,851	)	(6,539	)
Currency translation adjustments on investment in unconsolidated venture	(276	)	312
Total other comprehensive income (loss)	56,369		(129,307	)
Comprehensive income (loss)	195,159		(76,058	)
Less: Comprehensive (income) loss attributable to non-controlling interest	—		959
Less: Dividends to preferred stockholders	(11,107	)	(11,107	)
Comprehensive income (loss) attributable to common stockholders	184,052		(86,206	)

The accompanying notes are an integral part of these condensed consolidated financial statements.

3

INVESCO MORTGAGE CAPITAL INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

For the three months ended March 31, 2019 and 2018

(Unaudited)

									Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Distributions in excess of earnings)		Total Stockholders’ Equity
	Series A Preferred Stock		Series B Preferred Stock		Series C Preferred Stock
$ in thousands  except share amounts							Common Stock
	Shares	Amount	Shares	Amount	Shares	Amount	Shares	Amount
Balance at December 31, 2018	5,600,000	135,356	6,200,000	149,860	11,500,000	278,108	111,584,996	1,115	2,383,532	220,813	(882,087	)	2,286,697
Net income	—	—	—	—	—	—	—	—	—	—	138,790		138,790
Other comprehensive income	—	—	—	—	—	—	—	—	—	56,369	—		56,369
Proceeds from issuance of common stock, net of offering costs	—	—	—	—	—	—	16,672,000	167	258,386	—	—		258,553
Stock awards	—	—	—	—	—	—	10,501	—	—	—	—		—
Common stock dividends	—	—	—	—	—	—	—	—	—	—	(57,720	)	(57,720	)
Preferred stock dividends	—	—	—	—	—	—	—	—	—	—	(11,107	)	(11,107	)
Amortization of equity-based compensation	—	—	—	—	—	—	—	—	132	—	—		132
Balance at March 31, 2019	5,600,000	135,356	6,200,000	149,860	11,500,000	278,108	128,267,497	1,282	2,642,050	277,182	(812,124	)	2,671,714

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

INVESCO MORTGAGE CAPITAL INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Continued)

For the three months ended March 31, 2019 and 2018

(Unaudited)

							Attributable to Common Stockholders
									Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)		Retained Earnings (Distributions in excess of earnings)		Total Stockholders’ Equity		Non- Controlling Interest
	Series A Preferred Stock		Series B Preferred Stock		Series C Preferred Stock
$ in thousands  except share amounts							Common Stock											Total Equity
	Shares	Amount	Shares	Amount	Shares	Amount	Shares	Amount
Balance at December 31, 2017	5,600,000	135,356	6,200,000	149,860	11,500,000	278,108	111,624,159	1,116	2,384,356	261,029		(579,334	)	2,630,491		26,387		2,656,878
Net income	—	—	—	—	—	—	—	—	—	—		52,578		52,578		671		53,249
Other comprehensive loss	—	—	—	—	—	—	—	—	—	(127,677	)	—		(127,677	)	(1,630	)	(129,307	)
Stock awards	—	—	—	—	—	—	12,564	—	—	—		—		—		—		—
Common stock dividends	—	—	—	—	—	—	—	—	—	—		(46,887	)	(46,887	)	—		(46,887	)
Common unit dividends	—	—	—	—	—	—	—	—	—	—		—		—		(599	)	(599	)
Preferred stock dividends	—	—	—	—	—	—	—	—	—	—		(11,107	)	(11,107	)	—		(11,107	)
Amortization of equity-based compensation	—	—	—	—	—	—	—	—	127	—		—		127		2		129
Rebalancing of ownership percentage of non-controlling interest	—	—	—	—	—	—	—	—	143	—		—		143		(143	)	—
Balance at March 31, 2018	5,600,000	135,356	6,200,000	149,860	11,500,000	278,108	111,636,723	1,116	2,384,626	133,352		(584,750	)	2,497,668		24,688		2,522,356

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

INVESCO MORTGAGE CAPITAL INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended March 31,
$ in thousands	2019		2018
Cash Flows from Operating Activities
Net income	138,790		53,249
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of mortgage-backed and credit risk transfer securities premiums and (discounts), net	3,185		12,663
Realized and unrealized (gain) loss on derivative instruments, net	205,969		(145,479	)
Realized and unrealized (gain) loss on credit derivatives, net	(2,534	)	2,468
(Gain) loss on investments, net	(268,382	)	160,370
(Gain) loss from investments in unconsolidated ventures in excess of distributions received	(692	)	(352	)
Other amortization	(5,719	)	(6,265	)
Net loss on extinguishment of debt	—		26
(Gain) loss on foreign currency transactions, net	—		(1,800	)
Changes in operating assets and liabilities:
(Increase) decrease in operating assets	(10,015	)	1,334
Increase in operating liabilities	7,758		562
Net cash provided by operating activities	68,360		76,776
Cash Flows from Investing Activities
Purchase of mortgage-backed and credit risk transfer securities	(4,340,536	)	(298,859	)
(Contributions to) distributions from investments in unconsolidated ventures, net	299		(1,532	)
Change in other assets	1,154		—
Principal payments from mortgage-backed and credit risk transfer securities	300,222		488,123
Proceeds from sale of mortgage-backed and credit risk transfer securities	734,834		—
Settlement (termination) of futures, currency forwards and interest rate swaps, net	(232,387	)	113,578
Net change in due from counterparties and collateral held payable	(14,060	)	14,853
Principal payments from commercial loans held-for-investment	7,128		10,042
Origination and advances of commercial loans, net of origination fees	—		(698	)
Net cash (used in) provided by investing activities	(3,543,346	)	325,507
Cash Flows from Financing Activities
Proceeds from issuance of common stock	258,966		—
Proceeds from repurchase agreements	28,316,732		35,711,164
Principal repayments of repurchase agreements	(25,094,829	)	(35,880,828	)
Extinguishment of exchangeable senior notes	—		(143,433	)
Payments of deferred costs	(21	)	(76	)
Payments of dividends and distributions	(57,972	)	(58,587	)
Net cash provided by (used in) financing activities	3,422,876		(371,760	)
Net change in cash, cash equivalents and restricted cash	(52,110	)	30,523
Cash, cash equivalents and restricted cash, beginning of period	135,617		89,001
Cash, cash equivalents and restricted cash, end of period	83,507		119,524
Supplement Disclosure of Cash Flow Information
Interest paid	109,392		73,811
Non-cash Investing and Financing Activities Information
Net change in unrealized gain (loss) on mortgage-backed and credit risk transfer securities	62,496		(123,080	)
Dividends and distributions declared not paid	60,433		50,199
Net change in investment related payable (receivable)	(95,250	)	80,688
Offering costs not paid	(413	)	—

The accompanying notes are an integral part of these condensed consolidated financial statements.

6

INVESCO MORTGAGE CAPITAL INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1 – Organization and Business Operations

Invesco Mortgage Capital Inc. (the "Company", "we") is a Maryland corporation primarily focused on investing in, financing and managing residential and commercial mortgage-backed securities and other mortgage-related assets. We are externally managed and advised by Invesco Advisers, Inc. (our "Manager"), a registered investment adviser and an indirect, wholly-owned subsidiary of Invesco Ltd. ("Invesco"), a leading independent global investment management firm. We conduct our business through IAS Operating Partnership LP (the "Operating Partnership") and have one operating segment. Prior to November 30, 2018, a wholly-owned subsidiary of Invesco owned 1.3% of the Operating Partnership. See Note 15 - "Non-Controlling Interest - Operating Partnership" of our Annual Report on Form 10-K for the year ended December 31, 2018 for information regarding redemption of Operating Partnership Units ("OP Units") previously held by Invesco.

We primarily invest in:

• Residential mortgage-backed securities ("RMBS") that are guaranteed by a U.S. government agency such as the Government National Mortgage Association ("Ginnie Mae"), or a federally chartered corporation such as the Federal National Mortgage Association ("Fannie Mae") or the Federal Home Loan Mortgage Corporation ("Freddie Mac") (collectively "Agency RMBS");

• Commercial mortgage-backed securities (“CMBS”) that are guaranteed by a U.S. government agency such as Ginnie Mae or a federally chartered corporation such as Fannie Mae or Freddie Mac (collectively "Agency CMBS");

• RMBS that are not guaranteed by a U.S. government agency or a federally chartered corporation ("non-Agency RMBS");

• CMBS that are not guaranteed by a U.S. government agency or a federally chartered corporation (“non-Agency CMBS”);

• Credit risk transfer securities that are unsecured obligations issued by government-sponsored enterprises ("GSE CRT");

• Residential and commercial mortgage loans; and

• Other real estate-related financing agreements.

We elected to be taxed as a real estate investment trust ("REIT") for U.S. federal income tax purposes under the provisions of the Internal Revenue Code of 1986 commencing with our taxable year ended December 31, 2009. To maintain our REIT qualification, we are generally required to distribute at least 90% of our REIT taxable income to our stockholders annually. We operate our business in a manner that permits exclusion from the "Investment Company" definition under the Investment Company Act of 1940.

Note 2 – Summary of Significant Accounting Policies

Basis of Presentation and Consolidation

Certain disclosures included in our Annual Report on Form 10-K are not required to be included on an interim basis in our quarterly reports on Form 10-Q. We have condensed or omitted these disclosures. Therefore, this Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2018.

Our condensed consolidated financial statements have been prepared in accordance with U.S. GAAP and consolidate the financial statements of the Company and our controlled subsidiaries. All significant intercompany transactions, balances, revenues and expenses are eliminated upon consolidation. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, consisting of normal recurring accruals, which are necessary for a fair statement of our financial condition and results of operations for the periods presented.

Reclassifications

Our condensed consolidated balance sheet for the year ended December 31, 2018 presented in this Form 10-Q includes a reclassification of Commercial Loans, held-for-investment to Other assets to conform to our current period presentation. See Note 5 - "Other Assets" for further information. 

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and

7

accompanying notes. Examples of estimates include, but are not limited to, estimates of the fair values of financial instruments, interest income on mortgage-backed and credit risk transfer securities, provision for loan losses and other-than-temporary impairment charges. Actual results may differ from those estimates.

Significant Accounting Policies

There have been no changes to our accounting policies included in Note 2 to the consolidated financial statements of our Annual Report on Form 10-K for the year ended December 31, 2018 except for the implementation of new accounting guidance for stock-based payments to non-employees discussed below.

Accounting Pronouncements Recently Adopted

Effective January 1, 2019, we adopted the accounting guidance that aligns the measurement and classification for stock-based payments to non-employees with the guidance for stock-based payments to employees. Under the new guidance, the measurement of equity-classified non-employee awards is fixed at the grant date. The implementation of the guidance did not have a material impact on our financial statements.

Pending Accounting Pronouncements

In June 2016, new accounting guidance was issued for reporting credit losses for assets measured at amortized cost and available-for-sale securities. The new guidance significantly changes how entities will measure credit losses for most financial assets, including loans, that are not measured at fair value through net income. The guidance replaces the existing “incurred loss” model with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. The new guidance also simplifies the accounting model for purchased credit-impaired debt securities and loans. We are required to adopt the new guidance in the first quarter of 2020 by recording a cumulative effect adjustment to retained earnings as of January 1, 2020. We are currently evaluating the potential impacts of the new guidance and proposed amendments to the new guidance on our consolidated financial statements.

Note 3 – Variable Interest Entities ("VIEs")

Our maximum risk of loss in VIEs in which we are not the primary beneficiary at March 31, 2019 is presented in the table below.

$ in thousands	Carrying Amount	Company's Maximum Risk of Loss
Non-Agency CMBS	3,455,806	3,455,806
Non-Agency RMBS	1,186,896	1,186,896
Investments in unconsolidated ventures	24,129	24,129
Total	4,666,831	4,666,831

Refer to Note 4 - "Mortgage-Backed and Credit Risk Transfer Securities" and Note 5 - "Other Assets" for additional details regarding these investments.

8

Note 4 – Mortgage-Backed and Credit Risk Transfer Securities

The following tables summarize our mortgage-backed securities ("MBS") and GSE CRT portfolio by asset type as of March 31, 2019 and December 31, 2018.

March 31, 2019
$ in thousands	Principal/ Notional Balance	Unamortized Premium (Discount)		Amortized Cost	Unrealized Gain/ (Loss), net		Fair Value	Period- end Weighted Average Yield (1)
Agency RMBS:
15 year fixed-rate	343,116	2,595		345,711	6,391		352,102	3.34	%
30 year fixed-rate	12,264,517	386,145		12,650,662	65,974		12,716,636	3.66	%
ARM*	6,215	184		6,399	5		6,404	3.64	%
Hybrid ARM*	170,397	3,602		173,999	(478	)	173,521	3.11	%
Total Agency RMBS pass-through	12,784,245	392,526		13,176,771	71,892		13,248,663	3.64	%
Agency-CMO (2)	913,574	(585,878	)	327,696	(545	)	327,151	3.65	%
Agency CMBS	1,898,205	35,961		1,934,166	67,387		2,001,553	3.48	%
Non-Agency CMBS (3)	4,127,880	(737,241	)	3,390,639	65,167		3,455,806	5.08	%
Non-Agency RMBS (4)(5)(6)	2,774,428	(1,700,612	)	1,073,816	113,080		1,186,896	6.89	%
GSE CRT (7)	823,578	19,823		843,401	64,128		907,529	3.16	%
Total	23,321,910	(2,575,421	)	20,746,489	381,109		21,127,598	4.01	%

* Adjustable-rate mortgage ("ARM")

(1) Period-end weighted average yield is based on amortized cost as of March 31, 2019 and incorporates future prepayment and loss assumptions.

(2) Agency collateralized mortgage obligation ("Agency-CMO") includes interest-only securities ("Agency IO"), which represent 67.8% of principal/notional balance, 10.3% of amortized cost and 9.7% of fair value.

(3) Non-Agency CMBS includes interest-only securities which represent 14.6% of principal/notional balance, 0.4% of amortized cost and 0.4% of fair value.

(4) Non-Agency RMBS is 54.9% fixed rate, 39.7% variable rate, and 5.4% floating rate based on fair value. Coupon payments on variable rate investments are based upon changes in the underlying ARM and Hybrid ARM loan coupons, while coupon payments on floating rate investments are based upon a spread to a reference index.

(5) Of the total discount in non-Agency RMBS, $140.8 million is non-accretable calculated using the principal/notional balance and based on estimated future cash flows of the securities.

(6) Non-Agency RMBS includes interest-only securities ("non-Agency IO") which represent 54.6% of principal/notional balance, 2.2% of amortized cost and 2.1% of fair value.

(7) GSE CRT weighted average yield excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

9

December 31, 2018
$ in thousands	Principal/Notional Balance	Unamortized Premium (Discount)		Amortized Cost	Unrealized Gain/ (Loss), net		Fair Value	Period- end Weighted Average Yield (1)
Agency RMBS:
15 year fixed-rate	417,233	5,077		422,310	1,944		424,254	3.27	%
30 year fixed-rate	9,599,301	298,693		9,897,994	(125,225	)	9,772,769	3.55	%
ARM	105,453	350		105,803	(56	)	105,747	2.74	%
Hybrid ARM	548,133	13,425		561,558	(7,357	)	554,201	2.80	%
Total Agency RMBS pass-through	10,670,120	317,545		10,987,665	(130,694	)	10,856,971	3.49	%
Agency-CMO (2)	907,862	(631,180	)	276,682	(8,991	)	267,691	3.61	%
Agency CMBS	973,122	15,058		988,180	14,330		1,002,510	3.54	%
Non-Agency CMBS (3)	4,024,715	(727,307	)	3,297,408	(10,949	)	3,286,459	5.05	%
Non-Agency RMBS (4)(5)(6)	2,800,335	(1,748,223	)	1,052,112	111,570		1,163,682	7.24	%
GSE CRT (7)	738,529	21,259		759,788	59,541		819,329	3.10	%
Total	20,114,683	(2,752,848	)	17,361,835	34,807		17,396,642	4.00	%

(1) Period-end weighted average yield is based on amortized cost as of December 31, 2018 and incorporates future prepayment and loss assumptions.

(2) Agency collateralized mortgage obligation ("Agency-CMO") includes interest-only securities ("Agency IO"), which represent 73.6% of principal (notional) balance, 13.5%of amortized cost and 12.4% of fair value.

(3) Non-Agency CMBS includes interest-only securities which represent 15.0% of principal/notional balance, 0.4% of amortized cost and 0.5% of fair value.

(4) Non-Agency RMBS is 43.5% variable rate, 50.7% fixed rate, and 5.8% floating rate based on fair value. Coupon payments on variable rate investments are based upon changes in the underlying ARM and Hybrid ARM loan coupons, while coupon payments on floating rate investments are based upon a spread to a reference index.

(5) Of the total discount in non-Agency RMBS, $145.6 million is non-accretable calculated using the principal/notional balance andbased on estimated future cash flows of the securities.

(6) Non-Agency RMBS includes interest-only securities, which represent 55.4% of principal/notional balance, 2.3% of amortized cost and 2.4% of fair value.

(7) GSE CRT weighted average yield excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

The following table presents the fair value of our available-for-sale securities and securities accounted for under the fair value option by asset type as of March 31, 2019 and December 31, 2018. We have elected the fair value option for all of our RMBS IOs, our MBS purchased on or after September 1, 2016 and our GSE CRTs purchased on or after August 24, 2015. As of March 31, 2019 and December 31, 2018, approximately 76% and 67%, respectively, of our MBS and GSE CRTs are accounted for under the fair value option.

	March 31, 2019			December 31, 2018
$ in thousands	Available-for-sale Securities	Securities under Fair Value Option	Total Fair Value	Available-for-sale Securities	Securities under Fair Value Option	Total Fair Value
Agency RMBS:
15 year fixed-rate	135,169	216,933	352,102	204,347	219,907	424,254
30 year fixed-rate	918,778	11,797,858	12,716,636	1,093,070	8,679,699	9,772,769
ARM	6,404	—	6,404	105,747	—	105,747
Hybrid ARM	141,320	32,201	173,521	521,199	33,002	554,201
Total RMBS Agency pass-through	1,201,671	12,046,992	13,248,663	1,924,363	8,932,608	10,856,971
Agency-CMO	166,730	160,421	327,151	168,385	99,306	267,691
Agency CMBS	—	2,001,553	2,001,553	—	1,002,510	1,002,510
Non-Agency CMBS	2,144,187	1,311,619	3,455,806	2,153,403	1,133,056	3,286,459
Non-Agency RMBS	916,158	270,738	1,186,896	961,445	202,237	1,163,682
GSE CRT	579,142	328,387	907,529	586,231	233,098	819,329
Total	5,007,888	16,119,710	21,127,598	5,793,827	11,602,815	17,396,642

10

The components of the carrying value of our MBS and GSE CRT portfolio at March 31, 2019 and December 31, 2018 are presented below.

	March 31, 2019
$ in thousands	MBS and GSE CRT Securities		Interest-Only Securities		Total
Principal/ notional balance	20,734,762		2,587,148		23,321,910
Unamortized premium	488,161		—		488,161
Unamortized discount	(545,248	)	(2,518,334	)	(3,063,582	)
Gross unrealized gains (1)	447,903		5,613		453,516
Gross unrealized losses (1)	(67,022	)	(5,385	)	(72,407	)
Fair value	21,058,556		69,042		21,127,598

	December 31, 2018
$ in thousands	MBS and GSE CRT Securities		Interest-Only Securities		Total
Principal/ notional balance	17,442,367		2,672,316		20,114,683
Unamortized premium	395,907		—		395,907
Unamortized discount	(549,988	)	(2,598,767	)	(3,148,755	)
Gross unrealized gains (1)	238,579		7,448		246,027
Gross unrealized losses (1)	(204,664	)	(6,556	)	(211,220	)
Fair value	17,322,201		74,441		17,396,642

(1) Gross unrealized gains and losses includes gains (losses) recognized in net income for securities accounted for as derivatives or under the fair value option as well as gains (losses) for available-for-sale securities which are recognized as adjustments to other comprehensive income. Realization occurs upon sale or settlement of such securities. Further detail on the components of our total gains (losses) on investments, net for the three months ended March 31, 2019 and 2018 is provided below within this Note 4.

The following table summarizes our MBS and GSE CRT portfolio according to estimated weighted average life classifications as of March 31, 2019 and December 31, 2018. 

$ in thousands	March 31, 2019	December 31, 2018
Less than one year	49,768	110,020
Greater than one year and less than five years	5,188,229	3,508,100
Greater than or equal to five years	15,889,601	13,778,522
Total	21,127,598	17,396,642

11

The following tables present the estimated fair value and gross unrealized losses of our MBS and GSE CRTs by length of time that such securities have been in a continuous unrealized loss position at March 31, 2019 and December 31, 2018.

March 31, 2019

	Less than 12 Months				12 Months or More				Total
$ in thousands	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities
Agency RMBS:
15 year fixed-rate	8,398	(28	)	21	35,070	(165	)	25	43,468	(193	)	46
30 year fixed-rate	1,286	(11	)	4	4,448,849	(50,925	)	146	4,450,135	(50,936	)	150
ARM	—	—		—	2,760	(60	)	2	2,760	(60	)	2
Hybrid ARM	3,059	(6	)	1	101,210	(1,595	)	24	104,269	(1,601	)	25
Total Agency RMBS pass-through (1)	12,743	(45	)	26	4,587,889	(52,745	)	197	4,600,632	(52,790	)	223
Agency-CMO (2)	9,749	(3,276	)	16	109,177	(3,380	)	20	118,926	(6,656	)	36
Non-Agency CMBS (3)	94,622	(538	)	9	478,174	(10,226	)	41	572,796	(10,764	)	50
GSE CRT (4)	62,965	(381	)	4	—	—		—	62,965	(381	)	4
Non-Agency RMBS (5)	63,102	(1,225	)	13	93,291	(591	)	15	156,393	(1,816	)	28
Total	243,181	(5,465	)	68	5,268,531	(66,942	)	273	5,511,712	(72,407	)	341

(1) Includes Agency RMBS with a fair value of $4.2 billion for which the fair value option has been elected. Such securities have unrealized losses of $47.0 million.

(2) Includes Agency IO and Agency-CMO with fair value of $13.9 million and $17.9 million, respectively, for which the fair value option has been elected. These Agency IO and Agency-CMO securities have unrealized losses of $4.6 million and $64,000, respectively.

(3) Includes non-Agency CMBS with a fair value of $323.9 million for which the fair value option has been elected. Such securities have unrealized losses of $3.1 million.

(4) Fair value option has been elected for all GSE CRT that are in an unrealized loss position.

(5) Includes non-Agency RMBS and non-Agency IO with a fair value of $6.1 million and $4.9 million, respectively for which the fair value option has been elected. Such securities have unrealized losses of $223,000 and $821,000, respectively.

12

December 31, 2018

	Less than 12 Months				12 Months or More				Total
$ in thousands	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities
Agency RMBS:
15 year fixed-rate	86,241	(814	)	50	16,660	(189	)	22	102,901	(1,003	)	72
30 year fixed-rate	3,966,347	(49,182	)	158	2,846,090	(94,716	)	95	6,812,437	(143,898	)	253
ARM	2,632	(28	)	1	49,954	(785	)	10	52,586	(813	)	11
Hybrid ARM	6,758	(59	)	2	453,463	(8,390	)	71	460,221	(8,449	)	73
Total Agency RMBS pass-through (1)	4,061,978	(50,083	)	211	3,366,167	(104,080	)	198	7,428,145	(154,163	)	409
Agency-CMO (2)	152,962	(6,315	)	34	101,705	(5,100	)	19	254,667	(11,415	)	53
Non-Agency CMBS (3)	1,214,691	(17,778	)	94	659,298	(25,381	)	52	1,873,989	(43,159	)	146
Non-Agency RMBS (4)	87,850	(1,152	)	19	89,265	(1,138	)	16	177,115	(2,290	)	35
GSE CRT(5)	9,639	(193	)	1	—	—		—	9,639	(193	)	1
Total	5,527,120	(75,521	)	359	4,216,435	(135,699	)	285	9,743,555	(211,220	)	644

(1) Includes Agency RMBS with a fair value of $6.1 billion for which the fair value option has been elected. Such securities have unrealized losses of $130.2 million.

(2) Includes Agency IO and Agency-CMO with fair value of $21.8 million and $66.0 million, respectively, for which the fair value option has been elected. These Agency IO and Agency-CMO securities have unrealized losses of $6.3 million and $845,000, respectively.

(3) Includes non-Agency CMBS with a fair value of $831.3 million for which the fair value option has been elected. Such securities have unrealized losses of $26.3 million.

(4) Includes non-Agency RMBS and non-Agency IO with a fair value of $6.2 million and $3.7 million for which the fair value option has been elected. Such securities have unrealized losses of $79,000 and $269,000, respectively.

(5) Fair value option has been elected for all GSE CRT that are in an unrealized loss position.

Gross unrealized losses on our Agency RMBS, Agency CMBS, GSE CRT and CMO were $55.3 million at March 31, 2019 (December 31, 2018: $159.3 million). Due to the inherent credit quality of Agency RMBS, Agency CMBS and Agency-CMO, we determined that at March 31, 2019 and December 31, 2018, any unrealized losses on these securities are not other than temporary.

Gross unrealized losses on our Agency IO, non-Agency RMBS and non-Agency CMBS were $17.1 million at March 31, 2019 (December 31, 2018: $51.9 million). We did not consider these unrealized losses to be credit related, but rather due to non-credit related factors such as interest rates, prepayment speeds, and market fluctuations. These investment securities are included in our assessment for other-than-temporary impairment ("OTTI").

We assess our investment securities for OTTI on a quarterly basis. When the fair value of an investment is less than its amortized cost at the balance sheet date of the reporting period for which impairment is assessed, the impairment is designated as either "temporary" or "other-than-temporary." This analysis includes a determination of estimated future cash flows through an evaluation of the characteristics of the underlying loans and the structural features of the investment. Underlying loan characteristics reviewed include, but are not limited to, delinquency status, loan-to-value ratios, borrower credit scores, occupancy status and geographic concentration.

The following table summarizes OTTI included in earnings for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
$ in thousands	2019	2018
RMBS interest-only securities	1,463	4,309
Non-Agency RMBS (1)	313	50
Total	1,776	4,359

(1) Amounts disclosed relate to credit losses on debt securities for which a portion of an other-than-temporary impairment was recognized in other comprehensive income.

13

OTTI on RMBS interest-only securities was recorded as a reclassification from an unrealized to realized loss within gain (loss) on investments, net on the condensed consolidated statements of operations because we account for these securities under the fair value option. As of March 31, 2019, we did not intend to sell the securities and determined that it was not more likely than not that we will be required to sell the securities.

The following table summarizes the components of our total gain (loss) on investments, net for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019		2018
Gross realized gains on sale of investments	1,202		—
Gross realized losses on sale of investments	(12,317	)	(9,237	)
Other-than-temporary impairment losses	(1,776	)	(4,359	)
Net unrealized gains and losses on MBS accounted for under the fair value option	280,039		(147,195	)
Net unrealized gains and losses on GSE CRT accounted for under the fair value option	1,234		434
Net unrealized gains and losses on trading securities	—		(13	)
Total gain (loss) on investments, net	268,382		(160,370	)

The following tables present components of interest income recognized on our MBS and GSE CRT portfolio for the three months ended March 31, 2019 and 2018. GSE CRT interest income excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

For the three months ended March 31, 2019

$ in thousands	Coupon Interest	Net (Premium Amortization)/Discount Accretion		Interest Income
Agency RMBS and Agency CMBS	130,197	(12,725	)	117,472
Non-Agency CMBS	38,830	3,031		41,861
Non-Agency RMBS	14,267	3,922		18,189
GSE CRT	8,596	(1,178	)	7,418
Other	552	—		552
Total	192,442	(6,950	)	185,492

For the three months ended March 31, 2018

$ in thousands	Coupon Interest	Net (Premium Amortization)/Discount Accretion		Interest Income
Agency RMBS and Agency CMBS	108,317	(23,222	)	85,095
Non-Agency CMBS	37,293	1,426		38,719
Non-Agency RMBS	14,012	5,177		19,189
GSE CRT	6,525	(697	)	5,828
Other	172	—		172
Total	166,319	(17,316	)	149,003

14

Note 5 – Other Assets

The following table summarizes our other assets as of March 31, 2019 and December 31, 2018.

$ in thousands	March 31, 2019	December 31, 2018
FHLBI stock	74,250	74,250
Loan participation interest	53,827	54,981
Commercial loans, held-for-investment	24,454	31,582
Investments in unconsolidated ventures	24,129	24,012
Prepaid expenses and other assets	1,253	1,234
Total	177,913	186,059

IAS Services LLC, our wholly-owned captive insurance subsidiary, is required to purchase and hold Federal Home Loan Bank of Indianapolis ("FHLBI") stock as a condition of membership in the FHLBI. The stock is recorded at cost.

In August 2018, we acquired a participation interest in a secured loan collateralized by mortgage servicing rights. The loan has a two year term subject to a one year extension at the borrower's option. The participation interest bears interest at a floating rate based on LIBOR plus a spread. The weighted average asset yield for the participation interest was 6.14% as of March 31, 2019 and 6.06% as of December 31, 2018. We elected to account for the investment using the fair value option. Refer to Note 14 - "Commitments and Contingencies" for additional details regarding our unfunded commitment on this loan participation interest.

As of March 31, 2019, our commercial loan portfolio consisted of one commercial loan with a weighted average maturity of 1.9 years (December 31, 2018: two commercial loans with a weighted average maturity of 1.7 years). The loans had a weighted average coupon rate of 10.99% as of March 31, 2019 and 10.69% as of December 31, 2018. The loans were not impaired, and we have not recorded an allowance for loan losses as of March 31, 2019 and December 31, 2018 based on our analysis of credit quality factors as described in Note 2 - "Summary of Significant Accounting Policies" included in the consolidated financial statements of our Annual Report on Form 10-K for the year ended December 31, 2018.

We have invested in unconsolidated ventures that are managed by an affiliate of our Manager. The unconsolidated ventures invest in our target assets. Refer to Note 14 - "Commitments and Contingencies" for additional details regarding our commitments to these unconsolidated ventures.

15

Note 6 – Borrowings

We finance the majority of our investment portfolio through repurchase agreements and secured loans. The following tables summarize certain characteristics of our borrowings at March 31, 2019 and December 31, 2018. Refer to Note 7 - "Collateral Positions" for collateral pledged under our repurchase agreements and secured loans.

$ in thousands	March 31, 2019
				Weighted
		Weighted		Average
		Average		Remaining
	Amount	Interest		Maturity
	Outstanding	Rate		(days)
Repurchase Agreements:
Agency RMBS	11,868,925	2.68	%	67
Agency CMBS	1,639,097	2.67	%	72
Non-Agency CMBS	1,642,106	3.57	%	18
Non-Agency RMBS	887,186	3.46	%	25
GSE CRT	746,703	3.49	%	20
Loan participation interest	40,370	4.09	%	515
Total Repurchase Agreements	16,824,387	2.85	%	59
Secured Loans	1,650,000	2.76	%	1862
Total Borrowings	18,474,387	2.84	%	220

$ in thousands	December 31, 2018
				Weighted
		Weighted		Average
		Average		Remaining
	Amount	Interest		Maturity
	Outstanding	Rate		(days)
Repurchase Agreements:
Agency RMBS	9,529,352	2.56	%	36
Agency CMBS	810,450	2.53	%	31
Non-Agency CMBS	1,616,473	3.56	%	19
Non-Agency RMBS	923,959	3.60	%	26
GSE CRT	681,014	3.48	%	21
Loan participation interest	41,236	4.09	%	605
Total Repurchase Agreements	13,602,484	2.80	%	34
Secured Loans	1,650,000	2.68	%	1952
Total Borrowings	15,252,484	2.79	%	242

The following table shows the aggregate amount of maturities of our outstanding borrowings:

$ in thousands	As of
Borrowings maturing within:	March 31, 2019
4/1/2019 - 3/31/2020	17,084,017
4/1/2020 - 3/31/2021	140,370
4/1/2021 - 3/31/2022	—
4/1/2022 - 3/31/2023	—
4/1/2023 - 3/31/2024	—
Thereafter	1,250,000
Total	18,474,387

16

Repurchase Agreements

Our repurchase agreements generally bear interest at a contractually agreed upon rate and have maturities ranging from one month to six months. Our repurchase agreement that is collateralized by a loan participation interest bears interest at a floating rate based on LIBOR plus a spread and matures on August 27, 2020. Repurchase agreements are accounted for as secured borrowings since we maintain effective control of the financed assets. Repurchase agreements are subject to certain financial covenants. We were in compliance with these covenants at March 31, 2019.

Our repurchase agreement collateral ratio (MBS, GSE CRTs and a loan participation interest pledged as collateral/Amount Outstanding) was 110% as of March 31, 2019 (December 31, 2018: 111%).

Secured Loans

Our wholly-owned captive insurance subsidiary, IAS Services LLC, is a member of the FHLBI. As a member of the FHLBI, IAS Services LLC has borrowed funds from the FHLBI in the form of secured loans.

As of March 31, 2019, IAS Services LLC had $1.65 billion in outstanding secured loans from the FHLBI. These secured loans have floating rates that are based on the three-month FHLB swap rate plus a spread. For the three months ended March 31, 2019, IAS Services LLC had weighted average borrowings of $1.65 billion with a weighted average borrowing rate of 2.70% and a weighted average maturity of 5.1 years.

The Federal Housing Finance Agency’s ("FHFA") final rule governing Federal Home Loan Bank membership (the "FHFA Rule") became effective on February 19, 2016. The FHFA Rule permits existing captive insurance companies, such as IAS Services LLC, to remain members until February 2021. New advances or renewals that mature after February 2021 are prohibited. The FHLBI has indicated it will honor the contractual maturity dates of existing advances to IAS Services LLC that were made prior to February 19, 2016 and extend beyond February 2021. We do not expect there to be any impact to our existing FHLBI borrowings under the FHFA rule. The ability to borrow from the FHLBI is subject to our continued creditworthiness, pledging of sufficient eligible collateral to secure advances, and compliance with certain agreements with FHLBI and FHFA rules.

As discussed in Note 5 - "Other Assets," IAS Services LLC is required to purchase and hold a certain amount of FHLBI stock, which is based, in part, upon the outstanding principal balance of secured loans from the FHLBI.

17

Note 7 - Collateral Positions

The following table summarizes the fair value of collateral that we have pledged and held under our repurchase agreements, secured loans, interest rate swaps, futures contracts and currency forward contracts as of March 31, 2019 and December 31, 2018. Refer to Note 2 - "Summary of Significant Accounting Policies - Fair Value Measurements" of our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 for a description of how we determine fair value. RMBS, CMBS and GSE CRT collateral pledged is included in mortgage-backed and credit risk transfer securities on our condensed consolidated balance sheets. Loan participation interest collateral pledged is included in other assets on our condensed consolidated balance sheets. Cash collateral pledged on secured loans, centrally cleared swaps, bilateral interest rate swaps and currency forward contracts is classified as restricted cash on our condensed consolidated balance sheets. Cash collateral pledged on futures contracts is classified as due from counterparties on our condensed consolidated balance sheets.

Cash collateral held on bilateral swaps that is not restricted for use is included in cash and cash equivalents on our condensed consolidated balance sheets and the liability to return the collateral is included in collateral held payable. Non-cash collateral held is only recognized if the counterparty defaults or if we sell the pledged collateral. As of March 31, 2019 and December 31, 2018, we did not recognize any non-cash collateral held.

$ in thousands	As of
Collateral Pledged	March 31, 2019	December 31, 2018
Repurchase Agreements:
Agency RMBS	12,575,947	10,158,404
Agency CMBS	1,763,779	870,702
Non-Agency CMBS	2,072,829	2,016,202
Non-Agency RMBS	1,079,223	1,127,911
GSE CRT	907,529	819,328
Loan participation interest	53,827	54,981
Total repurchase agreements collateral pledged	18,453,134	15,047,528
Secured Loans:
Agency RMBS	686,656	702,952
Non-Agency CMBS	1,260,396	1,227,412
Total secured loans collateral pledged	1,947,052	1,930,364
Interest Rate Swaps, Futures Contracts and Currency Forward Contracts:
Agency RMBS	197,958	159,914
Cash (1)	18,025	13,500
Total interest rate swaps, futures contracts and currency forward contracts collateral pledged	215,983	173,414
Total collateral pledged:
Mortgage-backed and credit risk transfer securities	20,544,317	17,082,825
Loan participation interest	53,827	54,981
Cash	18,025	13,500
Total collateral pledged	20,616,169	17,151,306
	As of
Collateral Held	March 31, 2019	December 31, 2018
Interest Rate Swaps:
Cash	2,273	18,083
Non-cash collateral	—	—
Total collateral held	2,273	18,083

(1) Includes restricted cash of $5,025,000 pledged as collateral on centrally cleared swaps.

18

Repurchase Agreements

Collateral pledged with our repurchase agreement counterparties is segregated in our books and records. The repurchase agreement counterparties have the right to resell and repledge the collateral posted but have the obligation to return the pledged collateral, or substantially the same collateral if agreed to by us, upon maturity of the repurchase agreement. Under the repurchase agreements, the respective lender retains the contractual right to mark the underlying collateral to fair value as determined by a pricing service agreed to by the respective lender and us. We would be required to provide additional collateral or fund margin calls if the value of pledged assets declined. We intend to maintain a level of liquidity that will enable us to meet margin calls.

Secured Loans

The ability to borrow from the FHLBI is subject to our continued creditworthiness, pledging of sufficient eligible collateral to secure advances, and compliance with FHLBI and FHFA rules. Collateral pledged with the FHLBI is held in trust for the benefit of the FHLBI and is not commingled with our other assets. The FHLBI does not have the right to resell or repledge collateral posted unless an event of default occurs. The FHLBI retains the right to mark the underlying collateral for FHLBI advances to fair value as determined by the FHLBI in its sole discretion. IAS Services LLC would be required to provide additional collateral or fund margin calls if the value of pledged assets declines.

Interest Rate Swaps

Collateral pledged with our interest rate swap counterparties is segregated in our books and records. We have two types of interest rate swap agreements: bilateral interest rate swaps that are governed by an International Swaps and Derivatives Association ("ISDA") agreement and interest rate swaps that are centrally cleared by a registered clearing organization such as the Chicago Mercantile Exchange ("CME") and LCH Limited ("LCH") through a Futures Commission Merchant ("FCM"). Interest rate swaps that are governed by an ISDA agreement provide for bilateral collateral pledging based on the counterparties' market value. The counterparties have the right to repledge the collateral posted, but have the obligation to return the pledged collateral, or substantially the same collateral, if agreed to by us, as the market value of the interest rate swaps change.

We are required to pledge initial margin and daily variation margin for our interest rate swaps that are centrally cleared. The FCM determines the fair value of our centrally cleared swaps, including daily variation margin. The daily variation margin payment for centrally cleared interest rate swaps is characterized as settlement of the derivative itself rather than collateral. Accordingly, cash collateral pledged on our centrally cleared interest rate swaps is settled against the fair value of these swaps.

Futures Contracts

We are required to pledge initial margin and daily variation margin for our futures contracts that is based on the fair value of our contracts as determined by our FCM. The daily variation margin payment for our futures contracts is characterized as settlement of the futures contract itself rather than collateral. Accordingly, cash collateral pledged on our futures contracts is settled against the fair value of these contracts.

Currency Forward Contracts

Collateral pledged with our currency forward counterparty is segregated in our books and records. Our currency forward contract provides for bilateral collateral pledging based on market value as determined by the counterparty and can be in the form of cash or securities. Our counterparty has the right to repledge the collateral posted, but has the obligation to return the pledged collateral, or substantially the same collateral, if agreed to by us, as the market value of the currency forward contract changes.

19

Note 8 – Derivatives and Hedging Activities

The following table summarizes changes in the notional amount of our derivative instruments during 2019:

$ in thousands	Notional Amount as of December 31, 2018	Additions	Settlement, Termination, Expiration or Exercise		Notional Amount as of March 31, 2019
Interest Rate Swaps	12,370,000	4,575,000	(4,050,000	)	12,895,000
Futures Contracts	1,689,900	1,586,400	(1,689,900	)	1,586,400
Currency Forward Contracts	23,149	25,534	(23,149	)	25,534
Credit Derivatives	526,912	—	(9,378	)	517,534
Total	14,609,961	6,186,934	(5,772,427	)	15,024,468

Refer to Note 7 - "Collateral Positions" for further information regarding our collateral pledged to and received from our interest rate swap counterparties.

Interest Rate Swaps

Our repurchase agreements are usually settled on a short-term basis ranging from one to twelve months. At each settlement date, we typically refinance each repurchase agreement at the market interest rate at that time. In addition, our secured loans have floating interest rates. As such, we are exposed to changing interest rates. Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposures to interest rate movements. To accomplish these objectives, we primarily use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps involve making fixed-rate payments to a counterparty in exchange for the receipt of variable-rate amounts over the life of the agreements without exchange of the underlying notional amount.

Amounts recorded in accumulated other comprehensive income ("AOCI") before we discontinued cash flow hedge accounting for our interest rate swaps are reclassified to interest expense on repurchase agreements on the condensed consolidated statements of operations as interest is accrued and paid on the related repurchase agreements over the remaining life of the interest rate swap agreements. We reclassified $5.9 million as a decrease (March 31, 2018: $6.5 million as a decrease) to interest expense for the three months ended March 31, 2019. During the next 12 months, we estimate that $23.8 million will be reclassified as a decrease to interest expense, repurchase agreements. As of March 31, 2019, $93.8 million (December 31, 2018: $99.6 million) of unrealized gains on discontinued cash flow hedges, net are still included in accumulated other comprehensive income and will be reclassified to interest expense over a period of time through December 15, 2023.

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As of March 31, 2019 and December 31, 2018, we had the following interest rate swaps outstanding:

$ in thousands	As of March 31, 2019
Maturities	Notional Amount(1)	Weighted Average Fixed Pay Rate		Weighted Average Receive Rate		Weighted Average Years to Maturity
2020	1,000,000	2.72	%	2.50	%	1.4
2021	2,800,000	2.49	%	2.54	%	2.2
2022	2,550,000	2.13	%	2.61	%	3.2
2023	1,500,000	2.21	%	2.48	%	4.3
2024	1,600,000	2.27	%	2.65	%	4.8
Thereafter	3,445,000	2.46	%	2.52	%	7.8
Total	12,895,000	2.37	%	2.55	%	4.4

$ in thousands	As of December 31, 2018
Maturities	Notional Amount(2)	Weighted Average Fixed Pay Rate		Weighted Average Receive Rate		Weighted Average Years to Maturity
2019	1,500,000	2.70	%	2.47	%	0.9
2020	1,500,000	2.78	%	2.51	%	1.7
2021	2,300,000	2.51	%	2.58	%	2.5
2022	2,550,000	2.13	%	2.65	%	3.4
2023	1,600,000	2.39	%	2.47	%	4.7
Thereafter	2,920,000	2.47	%	2.55	%	6.8
Total	12,370,000	2.46	%	2.55	%	3.7

(1) Notional amount includes $8.4 billion of interest rate swaps that receive variable payments based on 1-month LIBOR and $4.5 billion of interest rate swaps that receive variable payments based on 3-month LIBOR as of March 31, 2019.

(2) Notional amount includes $6.7 billion of interest rate swaps that receive variable payments based on 1-month LIBOR and $5.7 billion of interest rate swaps that receive variable payments based on 3-month LIBOR as of December 31, 2018.

TBAs, Futures and Currency Forward Contracts

We purchase or sell certain TBAs and U.S. Treasury futures contracts to help mitigate the potential impact of changes in interest rates on the performance of our investment portfolio. We recognize realized and unrealized gains and losses associated with the purchases or sales of TBAs and U.S. Treasury futures contracts in gain (loss) on derivative instruments, net in our condensed consolidated statements of operations.

We use currency forward contracts to help mitigate the potential impact of changes in foreign currency exchange rates on our investments denominated in foreign currencies. We recognize realized and unrealized gains and losses associated with the purchases or sales of currency forward contracts in gain (loss) on derivative instruments, net in our condensed consolidated statements of operations. As of March 31, 2019, we had $25.5 million (December 31, 2018: $23.1 million) of notional amount of currency forward contracts denominated in Euro.

Credit Derivatives

Our GSE CRTs purchased prior to August 24, 2015 are accounted for as hybrid financial instruments consisting of a debt host contract and an embedded credit derivative. Embedded derivatives associated with GSE CRTs are recorded within mortgage-backed and credit risk transfer securities, at fair value, on the condensed consolidated balance sheets. At March 31, 2019 and December 31, 2018, terms of the GSE CRT embedded derivatives are:

$ in thousands	March 31, 2019	December 31, 2018
Fair value amount	25,305	22,771
Notional amount	517,534	526,912
Maximum potential amount of future undiscounted payments	517,534	526,912

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Tabular Disclosure of the Effect of Derivative Instruments on the Balance Sheet

The table below presents the fair value of our derivative financial instruments, as well as their classification on the condensed consolidated balance sheets as of March 31, 2019 and December 31, 2018.

$ in thousands

Derivative Assets			Derivative Liabilities
	As of March 31, 2019	As of December 31, 2018		As of March 31, 2019	As of December 31, 2018
Balance Sheet	Fair Value	Fair Value	Balance Sheet	Fair Value	Fair Value
Interest Rate Swaps Asset	21,161	15,089	Interest Rate Swaps Liability	8,463	15,382
Currency Forward Contracts	311	—	Currency Forward Contracts	—	172
Futures Contracts	5,108	—	Futures Contracts	—	7,836

Tabular Disclosure of the Effect of Derivative Instruments on the Income Statement

The tables below present the effect of our credit derivatives on the condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018.

$ in thousands	Three months ended March 31, 2019
Derivative not designated as hedging instrument	Realized gain (loss), net	GSE CRT embedded derivative coupon interest	Unrealized gain (loss), net	Realized and unrealized credit derivative income (loss), net
GSE CRT Embedded Derivatives	—	5,350	2,534	7,884

$ in thousands	Three months ended March 31, 2018
Derivative not designated as hedging instrument	Realized gain (loss), net	GSE CRT embedded derivative coupon interest	Unrealized gain (loss), net		Realized and unrealized credit derivative income (loss), net
GSE CRT Embedded Derivatives	—	5,633	(2,468	)	3,165

The following table summarizes the effect of interest rate swaps, futures contracts and currency forward contracts reported in gain (loss) on derivative instruments, net on the condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018:

$ in thousands	Three Months Ended March 31, 2019
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)	Unrealized gain (loss), net	Gain (loss) on derivative instruments, net
Interest Rate Swaps	(165,884	)	4,509	12,991	(148,384	)
Futures Contracts	(66,688	)	—	12,944	(53,744	)
Currency Forward Contracts	185		—	483	668
Total	(232,387	)	4,509	26,418	(201,460	)

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$ in thousands	Three Months Ended March 31, 2018
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)		Unrealized gain (loss), net		Gain (loss) on derivative instruments, net
Interest Rate Swaps	122,273		(12,112	)	32,374		142,535
Futures Contracts	(5,277	)	—		(1,612	)	(6,889	)
Currency Forward Contracts	(3,418	)	—		1,139		(2,279	)
Total	113,578		(12,112	)	31,901		133,367

Credit-risk-related Contingent Features

We have agreements with each of our bilateral derivative counterparties. Some of those agreements contain a provision whereby if we default on any of our indebtedness, including default whereby repayment of the indebtedness has not been accelerated by the lender, we could be declared in default on our derivative obligations.

At March 31, 2019, the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for non-performance risk related to bilateral interest rate swap agreements, was $8.4 million. We have minimum collateral posting thresholds with certain of our bilateral derivative counterparties and were required to pledge $12.1 million of collateral with these counterparties as of March 31, 2019. If we had breached any of these provisions at March 31, 2019, we could have been required to settle our obligations under these agreements at their termination value.

We also have an agreement with a clearing counterparty for our interest rate swaps that includes cross default provisions. The fair value of our centrally cleared interest rate derivative contracts, which includes accrued interest and variation margin but excludes any adjustment for non-performance risk, was a net asset of $17.8 million as of March 31, 2019.

We were in compliance with all of the financial provisions of these counterparty agreements as of March 31, 2019.

Note 9 – Offsetting Assets and Liabilities

Certain of our repurchase agreements and derivative transactions are governed by underlying agreements that generally provide for a right of offset under master netting arrangements (or similar agreements) in the event of default or in the event of bankruptcy of either party to the transactions. Assets and liabilities subject to such arrangements are presented on a gross basis in the condensed consolidated balance sheets.

The following tables present information about the assets and liabilities that are subject to master netting agreements (or similar agreements) and can potentially be offset on our condensed consolidated balance sheets at March 31, 2019 and December 31, 2018. The daily variation margin payment for centrally cleared interest rate swaps is characterized as settlement of the derivative itself rather than collateral. As of March 31, 2019, our derivative asset of $17.8 million (December 31, 2018: derivative liability of $13.2 million) related to centrally cleared interest rate swaps is not included in the table below as a result of this characterization of daily variation margin.

Offsetting of Derivative Assets

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments	Cash Collateral Received		Net Amount
Derivatives (1) (3)	8,742	—	8,742	—	(2,201	)	6,541

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Offsetting of Derivative Liabilities, Repurchase Agreements and Secured Loans

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged	Net Amount
Derivatives (3)	8,463	—	8,463	(8,463	)	—	—
Repurchase Agreements (4)	16,824,387	—	16,824,387	(16,824,387	)	—	—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—	—
Total	18,482,850	—	18,482,850	(18,482,850	)	—	—

Offsetting of Derivative Assets

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments		Cash Collateral Received		Net Amount
Derivatives (1) (3)	15,089	—	15,089	(433	)	(14,656	)	—

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Offsetting of Derivative Liabilities and Repurchase Agreements

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged		Net Amount
Derivatives (3)	10,239	—	10,239	(2,058	)	(7,836	)	345
Repurchase Agreements (4)	13,602,484	—	13,602,484	(13,602,484	)	—		—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—		—
Total	15,262,723	—	15,262,723	(15,254,542	)	(7,836	)	345

(1) Amounts represent derivatives in an asset position which could potentially be offset against derivatives in a liability position at March 31, 2019 and December 31, 2018, subject to a netting arrangement.

(2) Amounts represent collateral pledged that is available to be offset against liability balances associated with repurchase agreements, secured loans and derivatives.

(3) The fair value of securities pledged against our derivatives was $198.0 million (December 31, 2018: $159.9 million) at March 31, 2019, of which $164.8 million (December 31, 2018: $158.3 million) relates to initial margin pledged on centrally cleared interest rate swaps. Centrally cleared interest rate swaps are excluded from the tables above. Cash collateral received on our derivatives was $2.3 million and $18.1 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged by us on our futures contracts and interest rate swaps were $18.0 million and $13.5 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged on our centrally cleared interest rate swaps is settled against the fair value of these swaps and therefore excluded from the tables above at March 31, 2019 and December 31, 2018, respectively.

(4) The fair value of securities pledged against our borrowing under repurchase agreements was $18.5 billion and $15.0 billion at March 31, 2019 and December 31, 2018, respectively.

(5) The fair value of securities pledged against IAS Services LLC's borrowings under secured loans was $1.9 billion at March 31, 2019 and December 31, 2018, respectively.

Note 10 – Fair Value of Financial Instruments

A three-level valuation hierarchy exists for disclosure of fair value measurements based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. Observable inputs reflect readily obtainable data from independent sources, while unobservable inputs reflect our market assumptions. The three levels are defined as follows:

• Level 1 Inputs – Quoted prices for identical instruments in active markets.

• Level 2 Inputs – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable.

• Level 3 Inputs – Instruments with primarily unobservable value drivers.

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The following tables present our assets and liabilities measured at fair value on a recurring basis.

	March 31, 2019
	Fair Value Measurements Using:
$ in thousands	Level 1	Level 2	Level 3	NAV as a practical expedient (3)	Total at Fair Value
Assets:
Mortgage-backed and credit risk transfer securities (1)(2)	—	21,102,293	25,305	—	21,127,598
Derivative assets	5,108	21,472	—	—	26,580
Other assets (4)	—	—	53,827	24,129	77,956
Total assets	5,108	21,123,765	79,132	24,129	21,232,134
Liabilities:
Derivative liabilities	—	8,463	—	—	8,463
Total liabilities	—	8,463	—	—	8,463

	December 31, 2018
	Fair Value Measurements Using:
$ in thousands	Level 1	Level 2	Level 3	NAV as a practical expedient (3)	Total at Fair Value
Assets:
Mortgage-backed and credit risk transfer securities (1)(2)	—	17,373,871	22,771	—	17,396,642
Derivative assets	—	15,089	—	—	15,089
Other assets (4)	—	—	54,981	24,012	78,993
Total assets	—	17,388,960	77,752	24,012	17,490,724
Liabilities:
Derivative liabilities	7,836	15,554	—	—	23,390
Total liabilities	7,836	15,554	—	—	23,390

(1) For more detail about the fair value of our MBS and GSE CRTs, refer to Note 4 - "Mortgage-Backed and Credit Risk Transfer Securities."

(2) Our GSE CRTs purchased prior to August 24, 2015 are accounted for as hybrid financial instruments with an embedded derivative. The hybrid financial instruments consist of debt host contracts classified as Level 2 and embedded derivatives classified as Level 3. As of March 31, 2019, the net embedded derivative asset position of $25.3 million includes $30.2 million of embedded derivatives in an asset position and $4.9 million of embedded derivatives in a liability position. As of December 31, 2018, the net embedded derivative asset position of $22.8 million includes $28.8 million of embedded derivatives in an asset position and $6.0 million of embedded derivatives in a liability position.

(3) Investments in unconsolidated ventures are valued using the net asset value ("NAV") as a practical expedient and are not subject to redemption, although investors may sell or transfer their interest at the approval of the general partner of the underlying funds. As of March 31, 2019 and December 31, 2018, the weighted average remaining term of our investments in unconsolidated ventures is 2.8 and 2.6 years, respectively.

(4) Includes $53.8 million and $55.0 million of a loan participation interest as of March 31, 2019 and December 31, 2018, respectively. The loan participation interest is transferable and bears interest at a variable rate based on LIBOR plus a spread and resets daily. As a result, the cost of the loan participation interest approximates its fair value.

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The following table shows a reconciliation of the beginning and ending fair value measurements of our GSE CRT embedded derivatives, which we have valued utilizing Level 3 inputs:

	Three Months Ended March 31,
$ in thousands	2019	2018
Beginning balance	22,771	45,400
Unrealized credit derivative gains (losses), net	2,534	(2,468	)
Ending balance	25,305	42,932

The following table shows a reconciliation of the beginning and ending fair value measurements of our loan participation interest, which we have valued utilizing Level 3 inputs:

	Three Months Ended March 31,
$ in thousands	2019
Beginning balance	54,981
Advances	577
Repayments	(1,731	)
Ending balance	53,827

The following tables summarize significant unobservable inputs used in the fair value measurement of our GSE CRT embedded derivatives:

	Fair Value at	Valuation	Unobservable		Weighted
$ in thousands	March 31, 2019	Technique	Input	Range	Average
GSE CRT Embedded Derivatives	25,305	Market Comparables, Vendor Pricing	Weighted average life	2.5 - 5.6 years	4.0 years

	Fair Value at	Valuation	Unobservable		Weighted
$ in thousands	December 31, 2018	Technique	Input	Range	Average
GSE CRT Embedded Derivatives	22,771	Market Comparables, Vendor Pricing	Weighted average life	2.9 - 5.9 years	4.3 years

These significant unobservable inputs change according to market conditions and security performance. We estimate the weighted average life of GSE CRTs in order to identify GSE corporate debt with a similar maturity. We obtain our weighted average life estimates from a third party provider. Although weighted average life is a significant input, changes in weighted average life may not have an explicit directional impact on the fair value measurement.

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The following table presents the carrying value and estimated fair value of our financial instruments that are not carried at fair value on the condensed consolidated balance sheets at March 31, 2019 and December 31, 2018:

	March 31, 2019		December 31, 2018
$ in thousands	Carrying Value	Estimated Fair Value	Carrying Value	Estimated Fair Value
Financial Assets
Commercial loans, held-for-investment	24,454	24,732	31,582	31,826
FHLBI stock	74,250	74,250	74,250	74,250
Total	98,704	98,982	105,832	106,076
Financial Liabilities
Repurchase agreements	16,824,387	16,825,642	13,602,484	13,602,050
Secured loans	1,650,000	1,650,000	1,650,000	1,650,000
Total	18,474,387	18,475,642	15,252,484	15,252,050

The following describes our methods for estimating the fair value for financial instruments not carried at fair value on the condensed consolidated balance sheets.

• The estimated fair value of commercial loans held-for-investment, included in "Other assets" on our condensed consolidated balance sheets, is a Level 3 fair value measurement. Subsequent to the origination or purchase, commercial loan investments are valued on a monthly basis by an independent third party valuation agent using a discounted cash flow technique.

• The estimated fair value of FHLBI stock, included in "Other assets" on our condensed consolidated balance sheets, is a Level 3 fair value measurement. FHLBI stock may only be sold back to the FHLBI at its discretion at par. As a result, the cost of the FHLBI stock approximates its fair value.

• The estimated fair value of repurchase agreements is a Level 3 fair value measurement based on an expected present value technique. This method discounts future estimated cash flows using rates we determined best reflect current market interest rates that would be offered for repurchase agreements with similar characteristics and credit quality.

• The estimated fair value of secured loans is a Level 3 fair value measurement. The secured loans have floating rates based on an index plus a spread and the spread is typically consistent with those demanded in the market. Accordingly, the interest rates on these secured loans are at market, and thus the carrying amount approximates fair value.

Note 11 – Related Party Transactions

Under the terms of our management agreement, our Manager and its affiliates provide us with our management team, including our officers and appropriate support personnel. Each of our officers is an employee of our Manager or one of its affiliates. We do not have any employees. Our Manager is not obligated to dedicate any of its employees exclusively to us, nor is our Manager obligated to dedicate any specific portion of time to our business. During the three months ended March 31, 2019, we reimbursed our Manager $183,000 (March 31, 2018: $214,000) for costs of support personnel that are fully dedicated to our business.

We have invested $62.0 million as of March 31, 2019 (December 31, 2018: $131.9 million) in money market or mutual funds managed by affiliates of our Manager. The investments are reported as cash and cash equivalents on our condensed consolidated balance sheets.

Management Fee Expense

We pay our Manager a management fee equal to 1.50% of our stockholders’ equity per annum. The fee is calculated and payable quarterly in arrears. For purposes of calculating the management fee, stockholders’ equity is equal to the sum of the net proceeds from all issuances of equity securities since inception including proceeds from the issuance of operating partnership units to an affiliate of our Manager, plus retained earnings at the end of the most recently completed calendar quarter (without taking into account any non-cash equity compensation expense incurred in current or prior periods), less any amount paid to repurchase common stock since inception. Stockholders equity excludes (i) any unrealized gains, losses or other items that do not affect realized net income (regardless of whether such items are included in other comprehensive income or loss, or in net income); (ii) cumulative net realized losses that are not attributable to permanently impaired investments and that relate to the investments for which market movement is accounted for in other comprehensive income; provided, however, that such adjustment shall not exceed cumulative unrealized net gains in other comprehensive income; (iii) one-time events pursuant to

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changes in U.S. GAAP; and (iv) certain non-cash items after discussions between our Manager and our independent directors and approval by a majority of our independent directors.

We do not pay any management fees on our investments in unconsolidated ventures that are managed by an affiliate of our Manager.

Expense Reimbursement

We are required to reimburse our Manager for our operating expenses incurred on our behalf, including directors and officers insurance, accounting services, auditing and tax services, filing fees, and miscellaneous general and administrative costs. Our reimbursement obligation is not subject to any dollar limitation.

The following table summarizes the costs incurred on our behalf by our Manager for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019	2018
Incurred costs, prepaid or expensed	1,604	1,492
Incurred costs, charged against equity as a cost of raising capital	320	165
Total incurred costs, originally paid by our Manager	1,924	1,657

Termination Fee

If we terminate our management agreement, we owe our Manager a termination fee equal to three times the sum of our average annual management fee during the 24-month period before termination, calculated as of the end of the most recently completed fiscal quarter.

Note 12 – Stockholders’ Equity

Preferred Stock

Holders of our Series A Preferred Stock are entitled to receive dividends at an annual rate of 7.75% of the liquidation preference of $25.00 per share or $1.9375 per share per annum. Dividends are cumulative and payable quarterly in arrears.

Holders of our Series B Preferred Stock are entitled to receive dividends at an annual rate of 7.75% of the liquidation preference of $25.00 per share or $1.9375 per share per annum until December 27, 2024. After December 27, 2024, holders are entitled to receive dividends at a floating rate equal to three-month LIBOR plus a spread of 5.18% of the $25.00 liquidation preference per annum. Dividends are cumulative and payable quarterly in arrears.

Holders of our Series C Preferred Stock are entitled to receive dividends at an annual rate of 7.50% of the liquidation preference of $25.00 per share or $1.875 per share per annum until September 27, 2027. After September 27, 2027, holders are entitled to receive dividends at a floating rate equal to three-month LIBOR plus a spread of 5.289% of the $25.00 liquidation preference per annum. Dividends are cumulative and payable quarterly in arrears.

As of July 27, 2017, we had the option to redeem shares of Series A Preferred Stock for $25.00 per share, plus any accumulated and unpaid dividends through the date of redemption. We have the option to redeem shares of Series B Preferred Stock after December 27, 2024 and shares of Series C Preferred Stock after September 27, 2027 for $25.00 per share, plus any accumulated and unpaid dividends through the date of the redemption. Shares of Series B and Series C Preferred Stock are not redeemable, convertible into or exchangeable for any other property or any other securities of the Company prior to those times, except under circumstances intended to preserve our qualification as a REIT or upon the occurrence of a change in control.

In March 2019, we entered into an equity distribution agreement with a placement agent under which we may sell up to 7,000,000 shares of our preferred stock from time to time in at-the-market or privately negotiated transactions. These shares are registered with the SEC under our automatic shelf registration statement (as amended and/or supplemented). As of March 31, 2019, we have not sold any shares of preferred stock under the equity distribution agreement.

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Common Stock

On February 7, 2019, we completed a public offering of 16,100,000 shares of common stock at the price of $15.73 per share. Total net proceeds were approximately $249.5 million after deducting estimated offering costs.

In March 2019, we amended our equity distribution agreement, dated December 18, 2017, with a placement agent under which we may sell up to 17,000,000 shares of our common stock from time to time in at-the-market or privately negotiated transactions. These shares are registered with the SEC under our automatic shelf registration statement (as amended and/or supplemented). During the three months ended March 31, 2019, we issued 572,000 shares of common stock under the equity distribution agreement for proceeds of $9.1 million, net of approximately $193,000 in commissions and fees.

Share Repurchase Program

During the three months ended March 31, 2019 and 2018, we did not repurchase any shares of our common stock. As of March 31, 2019, we had authority to purchase 18,239,082 shares of our common stock through our share repurchase program.

Share-Based Compensation

We established the 2009 Equity Incentive Plan for grants of common stock and other equity based awards to our independent directors and officers and employees of our Manager and its affiliates (the "Incentive Plan"). Under the Incentive Plan, a total of 1,000,000 shares of common stock are authorized for issuance. As of March 31, 2019, 748,492 shares of common stock remain available for future issuance under the Incentive Plan. The Incentive Plan was scheduled to terminate on June 30, 2019 but was amended and restated as of May 3, 2019 extending the term an additional ten years. See Note 15 - "Subsequent Events" for a description of the amended Incentive Plan terms.

We recognized compensation expense of approximately $113,000 (March 31, 2018: $93,000) for shares issued to our independent directors under the Incentive Plan for the three months ended March 31, 2019. During the three months ended March 31, 2019 and 2018, we issued 7,065 shares and 7,177 shares of common stock, respectively, to our independent directors. The fair market value of the shares granted was determined by the closing stock market price on the date of the grant. The grants vested immediately.

We recognized compensation expense of approximately $19,000 (March 31, 2018: $14,000) for the three months ended March 31, 2019 for restricted stock units awarded to employees of our Manager and its affiliates under the Incentive Plan. Our Manager reimburses us for the cost of these restricted stock awards under the terms of our management agreement. At March 31, 2019, there was approximately $185,000 of total unrecognized compensation cost related to restricted stock unit awards that is expected to be recognized over a period of up to 48 months, with a weighted-average remaining vesting period of 24 months.

The following table summarizes the activity related to restricted stock units awarded to employees of our Manager and its affiliates for the three months ended March 31, 2019.

	Three Months Ended March 31,
	2019
	Restricted Stock Units		Weighted Average Grant Date Fair Value (1)
Unvested at the beginning of the period	11,051		$	14.55
Shares granted during the period	6,189		15.92
Shares vested during the period	(4,720	)	14.48
Unvested at the end of the period	12,520		$	15.25

(1) The grant date fair value of restricted stock awards is based on the closing market price of our common stock at the grant date.

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Accumulated Other Comprehensive Income

The following tables present the components of total other comprehensive income (loss), net and accumulated other comprehensive income ("AOCI") for the three months ended March 31, 2019 and 2018. The tables exclude gains and losses on MBS and GSE CRTs that are accounted for under the fair value option.

	Three Months Ended March 31, 2019
$ in thousands	Equity method investments		Available-for-sale securities	Derivatives and hedging		Total
Total other comprehensive income (loss)
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	—		52,349	—		52,349
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	—		10,147	—		10,147
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	—		—	(5,851	)	(5,851	)
Currency translation adjustments on investment in unconsolidated venture	(276	)	—	—		(276	)
Total other comprehensive income (loss)	(276	)	62,496	(5,851	)	56,369
AOCI balance at beginning of period	513		120,664	99,636		220,813
Total other comprehensive income (loss)	(276	)	62,496	(5,851	)	56,369
AOCI balance at end of period	237		183,160	93,785		277,182

	Three Months Ended March 31, 2018
$ in thousands	Equity method investments		Available-for-sale securities		Derivatives and hedging		Total
Total other comprehensive income (loss)
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	—		(132,317	)	—		(132,317	)
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	—		9,237		—		9,237
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	—		—		(6,539	)	(6,539	)
Currency translation adjustments on investment in unconsolidated venture	312		—		—		312
Total other comprehensive income (loss)	312		(123,080	)	(6,539	)	(129,307	)
AOCI balance at beginning of period	947		136,188		123,894		261,029
Total other comprehensive income (loss)	312		(123,080	)	(6,539	)	(129,307	)
Other comprehensive income/(loss) attributable to non-controlling interest	(4	)	1,552		82		1,630
AOCI balance at end of period	1,255		14,660		117,437		133,352

Amounts recorded in AOCI before we discontinued cash flow hedge accounting for our interest rate swaps are reclassified to interest expense on repurchase agreements on the condensed consolidated statements of operations as interest is accrued and paid on the related repurchase agreements over the remaining original life of the interest rate swap agreements.

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Dividends

We declared the following dividends during the three months ended March 31, 2019 and 2018:

$ in thousands, except per share amounts	Dividends Declared
Series A Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
March 18, 2019	0.4844	2,713	April 25, 2019
2018
March 15, 2018	0.4844	2,713	April 25, 2018

$ in thousands, except per share amounts	Dividends Declared
Series B Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
February 14, 2019	0.4844	3,003	March 27, 2019
2018
February 15, 2018	0.4844	3,003	March 27, 2018

$ in thousands, except per share amounts	Dividends Declared
Series C Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
February 14, 2019	0.46875	5,391	March 27, 2019
2018
February 15, 2018	0.46875	5,391	March 27, 2018

$ in thousands, except per share amounts	Dividends Declared
Common Stock	Per Share	In Aggregate	Date of Payment
2019
March 18, 2019	0.45	57,720	April 26, 2019
2018
March 15, 2018	0.42	46,887	April 26, 2018

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Note 13 – Earnings per Common Share

Earnings per share for the three months ended March 31, 2019 and 2018 is computed as follows:

	Three Months Ended March 31,
In thousands except per share amounts	2019	2018
Numerator (Income)
Basic Earnings:
Net income available to common stockholders	127,683	41,471
Effect of dilutive securities:
Income allocated to exchangeable senior notes	—	1,621
Income allocated to non-controlling interest	—	671
Dilutive net income available to stockholders	127,683	43,763
Denominator (Weighted Average Shares)
Basic Earnings:
Shares available to common stockholders	121,098	111,629
Effect of dilutive securities:
Restricted stock awards	12	20
Non-controlling interest OP units	—	1,425
Exchangeable senior notes	—	4,803
Dilutive Shares	121,110	117,877
Earnings per share:
Net income attributable to common stockholders
Basic	1.05	0.37
Diluted	1.05	0.37

Note 14 – Commitments and Contingencies

Commitments and Contingencies

Commitments and contingencies may arise in the ordinary course of business. Our material off-balance sheet commitments as of March 31, 2019 are discussed below.

As discussed in Note 5 - "Other Assets", we have invested in unconsolidated ventures that are sponsored by an affiliate of our Manager. The unconsolidated ventures are structured as partnerships, and we invest in the partnerships as a limited partner. The entities are structured such that capital commitments are to be drawn down over the life of the partnership as investment opportunities are identified. As of March 31, 2019 and December 31, 2018, our undrawn capital and purchase commitments were $7.6 million and $10.0 million, respectively.

As discussed in Note 5 - "Other Assets", we have funded our portion of a commitment in a loan participation. The remainder of our commitment will be funded over the two year term of the loan based upon the financing needs of the borrower. As of March 31, 2019, we have an unfunded commitment of $21.2 million.

As discussed in Note 12 - "Stockholders' Equity", we have programs under which we may sell shares of our common and preferred stock from time to time in at-the-market or privately negotiated transactions. As of March 31, 2019, we had committed to sell 90,000 shares of common stock at an average price of $15.83 per share for total proceeds of $1.4 million, net of approximately $30,000 in commissions and fees that settled in April 2019.

We have entered into agreements with financial institutions to guarantee certain obligations of our subsidiaries. We would be required to perform under these guarantees in the event of certain defaults. We have not had prior claims or losses pursuant to these contracts and expect the risk of loss to be remote.

Note 15 – Subsequent Events

On May 3, 2019, our shareholders approved the 2009 Equity Incentive Plan (the "Incentive Plan") as amended and restated. Under the amended and restated Incentive Plan, the number of shares of common stock available for issuance to

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our independent directors and officers and employees of our Manager and its affiliates was reduced to 200,000, and the term of the Incentive Plan was extended for an additional ten years.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

In this quarterly report on Form 10-Q, or this “Report,” we refer to Invesco Mortgage Capital Inc. and its consolidated subsidiaries as “we,” “us,” “our Company,” or “our,” unless we specifically state otherwise or the context indicates otherwise. We refer to our external manager, Invesco Advisers, Inc., as our “Manager,” and we refer to the indirect parent company of our Manager, Invesco Ltd. together with its consolidated subsidiaries (which does not include us), as “Invesco.”

The following discussion should be read in conjunction with our condensed consolidated financial statements and the accompanying notes to our condensed consolidated financial statements, which are included in Item 1 of this Report, as well as the information contained in our most recent Form 10-K filed with the Securities and Exchange Commission (the “SEC”).

Forward-Looking Statements

We make forward-looking statements in this Report and other filings we make with the SEC within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and such statements are intended to be covered by the safe harbor provided by the same. Forward-looking statements are subject to substantial risks and uncertainties, many of which are difficult to predict and are generally beyond our control. These forward-looking statements include information about possible or assumed future results of our business, investment strategies, financial condition, liquidity, results of operations, plans and objectives. When we use the words “believe,” “expect,” “anticipate,” “estimate,” “plan,” “continue,” “intend,” “should,” “may” or similar expressions and future or conditional verbs such as “will,” “may,” “could,” “should,” and “would,” and any other statement that necessarily depends on future events, we intend to identify forward-looking statements. Factors that could cause actual results to differ from those expressed in our forward-looking statements include, but are not limited to:

• our business and investment strategy;

• our investment portfolio;

• our projected operating results;

• general volatility of financial markets and effects of governmental responses, including actions and initiatives of the U.S. governmental agencies and changes to U.S. government policies, mortgage loan modification programs, actions and initiatives of foreign governmental agencies and central banks, monetary policy actions of the Federal Reserve, including actions relating to its agency mortgage-backed securities portfolio and the continuation of re-investment of principal payments, and our ability to respond to and comply with such actions, initiatives and changes;

• the availability of financing sources, including our ability to obtain additional financing arrangements and the terms of such arrangements;

• financing and advance rates for our target assets;

• changes to our expected leverage;

• our expected investments;

• our expected book value per common share;

• interest rate mismatches between our target assets and our borrowings used to fund such investments;

• the adequacy of our cash flow from operations and borrowings to meet our short-term liquidity needs;

• our ability to maintain sufficient liquidity to meet any margin calls;

• changes in the credit rating of the U.S. government;

• changes in interest rates and interest rate spreads and the market value of our target assets;

• changes in prepayment rates on our target assets;

• the impact of any deficiencies in foreclosure practices of third parties and related uncertainty in the timing of collateral disposition;

• our reliance on third parties in connection with services related to our target assets;

• effects of hedging instruments on our target assets;

• rates of default or decreased recovery rates on our target assets;

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• modifications to whole loans or loans underlying securities;

• the degree to which our hedging strategies may or may not protect us from interest rate volatility;

• the degree to which derivative contracts expose us to contingent liabilities;

• counterparty defaults;

• compliance with financial covenants in our financing arrangements;

• changes in governmental regulations, zoning, insurance, eminent domain and tax law and rates, and similar matters and our ability to respond to such changes;

• our ability to maintain our qualification as a real estate investment trust for U.S. federal income tax purposes;

• our ability to maintain our exception from the definition of “investment company” under the Investment Company Act of 1940, as amended (the “1940 Act”);

• availability of investment opportunities in mortgage-related, real estate-related and other securities;

• availability of U.S. Government Agency guarantees with regard to payments of principal and interest on securities;

• the market price and trading volume of our capital stock;

• availability of qualified personnel of our Manager;

• the relationship with our Manager;

• estimates relating to taxable income and our ability to continue to make distributions to our stockholders in the future;

• estimates relating to fair value of our target assets and loan loss reserves;

• our understanding of our competition;

• changes to generally accepted accounting principles in the United States of America (“U.S. GAAP”);

• the adequacy of our disclosure controls and procedures and internal controls over financial reporting; and

• market trends in our industry, interest rates, real estate values, the debt securities markets or the general economy.

The forward-looking statements are based on our beliefs, assumptions and expectations of our future performance, taking into account all information currently available to us. You should not place undue reliance on these forward-looking statements. These beliefs, assumptions and expectations can change as a result of many possible events or factors, not all of which are known to us. Some of these factors are described under the headings “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Business.” If a change occurs, our business, financial condition, liquidity and results of operations may vary materially from those expressed in our forward-looking statements. Any forward-looking statement speaks only as of the date on which it is made. New risks and uncertainties arise over time, and it is not possible for us to predict those events or how they may affect us. Except as required by law, we are not obligated to, and do not intend to, update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

The following discussion should be read in conjunction with our condensed consolidated financial statements and the accompanying notes to our condensed consolidated financial statements, which are included in this Report.

Overview

We are a Maryland corporation primarily focused on investing in, financing and managing residential and commercial mortgage-backed securities ("MBS") and mortgage loans. Our objective is to provide attractive risk-adjusted returns to our investors, primarily through dividends and secondarily through capital appreciation. To achieve this objective, we primarily invest in the following:

• Residential mortgage-backed securities (“RMBS”) that are guaranteed by a U.S. government agency such as the Government National Mortgage Association ("Ginnie Mae") or a federally chartered corporation such as the Federal National Mortgage Association ("Fannie Mae") or the Federal Home Loan Mortgage Corporation ("Freddie Mac") (collectively "Agency RMBS");

• Commercial mortgage-backed securities (“CMBS”) that are guaranteed by a U.S. government agency such as Ginnie Mae or a federally chartered corporation such as Freddie Mac or Fannie Mae (collectively "Agency CMBS");

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• RMBS that are not guaranteed by a U.S. government agency or a federally chartered corporation (“non-Agency RMBS”);

• CMBS that are not guaranteed by a U.S. government agency or a federally chartered corporation (“non-Agency CMBS”); 

• Credit risk transfer securities that are unsecured obligations issued by government-sponsored enterprises ("GSE CRT");

• Residential and commercial mortgage loans; and

• Other real estate-related financing arrangements.

We elected to be taxed as a real estate investment trust (“REIT”) for U.S. federal income tax purposes under the provisions of the Internal Revenue Code of 1986. To maintain our REIT qualification, we are generally required to distribute at least 90% of our REIT taxable income to our stockholders annually. We operate our business in a manner that permits our exclusion from the definition of “Investment Company” under the 1940 Act. We are externally managed and advised by Invesco Advisers, Inc., our Manager, which is an indirect, wholly-owned subsidiary of Invesco Ltd.

Capital Activities

On February 7, 2019, we completed a public offering of 16,100,000 shares of common stock at the price of $15.73 per share. Total net proceeds were approximately $249.5 million after deducting estimated offering expenses.

In March 2019, we amended our equity distribution agreement, dated December 17, 2019, with a placement agent under which we may sell up to 17,000,000 shares of our common stock from time to time in at-the-market or privately negotiated transactions. These shares are registered with the SEC under our automatic shelf registration statement (as amended and/or supplemented). During the three months ended March 31, 2019, we issued 572,000 shares of common stock under the equity distribution agreement for proceeds of $9.1 million, net of commissions and fees.

On March 18, 2019, we declared the following dividends:

• a dividend of $0.45 per share of common stock paid on April 26, 2019 to stockholders of record as of the close of business on March 29, 2019; and

• a dividend of $0.4844 per share of Series A Preferred Stock paid on April 25, 2019 to stockholders of record as of the close of business on April 1, 2019.

On February 14, 2019, we declared the following dividends:

• a dividend of $0.4844 per share of Series B Preferred Stock paid on March 27, 2019 to stockholders of record as of the close of business on March 5, 2019; and

• a dividend of $0.46875 per share of Series C Preferred Stock paid on March 27, 2019 to stockholders of record as of the close of business on March 5, 2019.

During the three months ended March 31, 2019, we did not repurchase any shares of our common stock.

Factors Impacting Our Operating Results

Our operating results can be affected by a number of factors and primarily depend on the level of our net interest income and the market value of our assets. Our net interest income, which includes the amortization of purchase premiums and accretion of purchase discounts, varies primarily as a result of changes in market interest rates and prepayment speeds, as measured by the constant prepayment rate (“CPR”) on our target assets. Interest rates and prepayment speeds vary according to the type of investment, conditions in the financial markets, competition and other factors, none of which can be predicted with any certainty. The market value of our assets can be impacted by credit spread premiums (yield advantage over U.S. Treasury notes) and the supply of, and demand for, target assets in which we invest.

Market Conditions

Macroeconomic factors that affect our business include interest rate spread premiums, governmental policy initiatives, residential and commercial real estate prices, credit availability, consumer personal income and spending, corporate earnings, employment conditions, financial conditions and inflation.

Financial conditions eased significantly during the first quarter of 2019, sharply reversing the tightening trend we experienced during the final months of 2018. Volatility fell across the fixed income and equity markets as investors became

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more supportive of risk assets and financial markets rebounded from the lows of late December 2018. Equity markets had a strong start to 2019, as the S&P 500 Index returned over 13% during the first quarter, while the NASDAQ returned over 16%. Investor sentiment was bolstered as the Federal Open Market Committee (“FOMC”) signaled that they likely would not raise the Federal Funds rate in the coming quarters. Commodity prices rebounded along with equities, as the CRB Commodity Price Index increased by 8.2% during the first quarter and WTI Crude increased by 29.3%.

The U.S. economy appears to be growing at a moderate pace, and the labor market remains positive. Monthly gains in Nonfarm Payrolls averaged 180,000 for the first quarter, slowing from the 2018 average of 223,000. The unemployment rate remained close to multi-year lows at 3.8%. The consensus forecast for GDP growth in 2019 is 2.4%, with the consensus estimates for 2020 and 2021 at 1.9% and 1.8%, respectively.

Inflation remained subdued, with the U.S. Personal Consumption Expenditure Core Price Index remaining below the Federal Reserve’s inflation target of 2% in January. Implied breakeven rates on Treasury Inflation Protected securities, which reflect the markets' expectation of future inflation rates, rose during the quarter, with the implied 2- and 5-year inflation rates ending the first quarter at 1.83% and 1.79%, respectively. The FOMC did not take any action during its January and March meetings, and communication out of the central bank caused market expectations for further FOMC policy action to readjust once again. Over the course of the first quarter, the pricing of federal funds futures contracts went from implying no policy action during 2019 to implying one cut in each of 2019 and 2020. This caused Treasury rates to fall across the maturity spectrum, with the 2-year Treasury rate ending the first quarter down 25 basis points at 2.26% and 10-year Treasury rates falling 28 basis points to 2.41%.

Mortgage-backed securities performed well during the first quarter of 2019. Agency mortgages outperformed similar duration Treasuries during the quarter, with agency pools backed by collateral that offered protection against prepayment risk performing particularly well. The outlook for Agency RMBS is mixed, as prepayment risk is expected to increase in the coming quarters due to the seasonal impact of housing activity and the increase in refinance activity given lower mortgage rates. However, the shift in monetary policy by the Federal Reserve has reduced volatility and funding costs, providing a favorable environment for the sector. Beginning in October of this year, the Federal Reserve will begin reinvesting paydowns from the MBS portion of their balance sheet into Treasuries, which should produce a modest headwind for the sector as the balance sheet slowly shifts into an all-Treasury portfolio.

During the first quarter, spreads (defined as the yield in excess of risk-free rates) on Agency CMBS, non-Agency CMBS and GSE CRT securities tightened steadily as volatility fell and investor’s risk appetites returned. Fundamentals in both commercial and residential housing remain solid, lending further support to asset prices. Financing markets remained accommodative and repurchase agreement rates settled down after experiencing typical year end bank balance sheet pressures.

We expect the U.S. will continue to experience moderate, albeit slowing, economic growth, and that core inflation will remain close to the Federal Reserve’s policy objective of 2%. Other concerns include the actions of central banks and their impact on the global economy, the sustainability of China's economic growth, and the potential impact of the Brexit process and resulting stress in the European banking system.

In addition, the regulatory landscape for our repurchase agreement counterparties continues to evolve, which may affect their funding methods and lending practices. While we are not directly subject to compliance with the implementation of rules regarding financial institutions, the effect of these regulations and others could impact our ability to finance our assets in the future.

Proposed Changes to LIBOR

On July 27, 2017, the Chief Executive of the U.K. Financial Conduct Authority (the "FCA" ), which regulates LIBOR, announced that the FCA will no longer persuade or compel banks to submit rates for the calculation of the LIBOR benchmark after 2021.  This announcement indicates that the continuation of LIBOR on the current basis cannot and will not be guaranteed after 2021, and it appears likely that LIBOR will be phased out or the methodology for determining LIBOR will be modified by 2021. The Alternative Reference Rates Committee ("ARRC") has proposed that the Secured Overnight Financing Rate ("SOFR") is the rate that represents best practice as the alternative to USD-LIBOR for use in derivatives and other financial contracts that are currently indexed to USD-LIBOR. ARRC has proposed a paced market transition plan to SOFR from USD-LIBOR, and organizations are currently working on industry wide and company specific transition plans as it relates to derivatives and cash markets exposed to USD-LIBOR.

We have material contracts that are indexed to USD-LIBOR and are monitoring this activity and evaluating the related risks.  However, it is not possible to predict the effect of any of these developments, and any future initiatives to regulate, reform or change the manner of administration of LIBOR could result in adverse consequences to the rate of interest payable and receivable on, market value of and market liquidity for LIBOR-based financial instruments.

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Investment Activities

The table below shows the allocation of our equity as of March 31, 2019, December 31, 2018 and March 31, 2018:

	As of
$ in thousands	March 31, 2019		December 31, 2018		March 31, 2018
Agency RMBS and Agency CMBS	50	%	49	%	44	%
Commercial Credit (1)	32	%	33	%	36	%
Residential Credit (2)	18	%	18	%	20	%
Total	100	%	100	%	100	%

(1) Commercial credit includes non-Agency CMBS, commercial loans and investments in unconsolidated ventures.

(2) Residential credit includes non-Agency RMBS, GSE CRTs and a loan participation interest.

The table below shows the breakdown of our investment portfolio as of March 31, 2019, December 31, 2018 and March 31, 2018:

	As of
$ in thousands	March 31, 2019	December 31, 2018	March 31, 2018
Agency RMBS:
30 year fixed-rate, at fair value	12,716,636	9,772,769	7,662,038
15 year fixed-rate, at fair value	352,102	424,254	2,609,552
Hybrid ARM, at fair value	173,521	554,201	1,623,538
ARM, at fair value	6,404	105,747	227,666
Agency CMO, at fair value	327,151	267,691	253,954
Agency CMBS, at fair value	2,001,553	1,002,510	—
Non-Agency CMBS, at fair value	3,455,806	3,286,459	3,189,281
Non-Agency RMBS, at fair value	1,186,896	1,163,682	1,194,952
GSE CRT, at fair value	907,529	819,329	861,253
Loan participation interest, at fair value	53,827	54,981	—
Commercial loans, at amortized cost	24,454	31,582	184,255
Investments in unconsolidated ventures	24,129	24,012	28,168
Total Investment portfolio	21,230,008	17,507,217	17,834,657

During the three months ended March 31, 2019, we purchased $4.1 billion of Agency RMBS and Agency CMBS, $143.9 million of non-Agency CMBS, $75.6 million of non-Agency RMBS and $94.6 million of GSE CRT. We funded these purchases with proceeds from our common stock issuances and paydowns and sales of securities. During the three months ended March 31, 2019, we continued to actively manage our investment portfolio, selling most of our ARM and Hybrid ARM securities. We primarily reinvested the proceeds into fixed rate Agency RMBS and Agency CMBS.

As of March 31, 2019 our holdings of 30 year fixed-rate Agency RMBS represent approximately 60% of our total investment portfolio versus 56% as of December 31, 2018 and 43% as of March 31, 2018. Most of our holdings of 30 year fixed-rate Agency RMBS are in specified pools with attractive prepayment characteristics. We have continued to increase our holdings of 30 year fixed-rate Agency RMBS over the past 12 months as the return on equity profile for these securities remained attractive. Return on equity for 30 year fixed-rate Agency RMBS remained accretive due to lower funding costs given changes in the outlook for short-term interest rates. We have focused our purchases on 30 year specified pools priced at modest pay-ups to generic Agency RMBS because those securities have characteristics that reduce prepayment risk. 

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We began investing in Agency CMBS issued by Freddie Mac and Fannie Mae in 2018 and have continued to invest in these securities in 2019. We purchased these securities because we believe they have an attractive convexity and return on equity profile. They offer targeted exposure to multi-family loans and benefit from a guarantee of principal and interest payments from governmental agencies and federally chartered corporations. Further, the hedging costs are economical as they are less sensitive to interest rate risk given limited extension beyond initial expected maturity dates and underlying loan prepayment protection.

Our portfolio of investments that have credit exposure includes non-Agency CMBS, non-Agency RMBS, GSE CRTs, a commercial real estate loan, and a loan participation interest. Rather than relying on the rating agencies, we utilize proprietary models as well as third party applications to quantify and monitor the credit risk associated with our portfolio holdings. Our analysis generally begins at the underlying asset level, where we gather detailed information on loan, borrower, and property characteristics that inform our expectations for future performance. In addition to base case cash flow projections, we perform a range of scenario stresses to gauge the sensitivity of returns to potential deviations in underlying asset behavior. We perform this detailed credit analysis at the time of initial purchase and regularly throughout the holding period of each investment.

Our non-Agency CMBS portfolio generally consists of assets originated during and after 2010. These assets continue to benefit from rating agency upgrades, property price appreciation and limited supply. Non-Agency CMBS investments represent approximately 16% of our total investment portfolio as of March 31, 2019.

With respect to our non-Agency RMBS portfolio, we primarily invest in securities collateralized by prime and Alt-A loans. In addition, we have invested in re-securitizations of real estate mortgage investment conduit ("Re-REMIC") RMBS and securitizations of reperforming mortgage loans that we expect to provide attractive risk adjusted returns. We also invest in GSE CRTs, which have the added benefit of paying a floating rate coupon, reducing our need to hedge interest rate risk. The majority of our GSE CRT holdings are concentrated in 2013 and 2014 vintages, where reference loans have significant embedded home price appreciation. From a fundamental perspective, we continue to view GSE CRT as an attractive asset class based on the strength of the U.S. housing market and the strong performance of reference mortgage loans to date.

During the third quarter of 2018, we acquired a participation interest in a secured loan collateralized by mortgage servicing rights associated with Fannie Mae, Freddie Mac, and Ginnie Mae loans. The loan has a two year term subject to a one year extension at the borrower's option. We funded $53.8 million of the loan as of March 31, 2019 and have committed to fund up to an additional $21.2 million.

As of March 31, 2019, our commercial real estate loan portfolio consists of one mezzanine loan that we originated with a weighted average maturity of approximately two years and a loan-to-value ratio of approximately 74.2%. One commercial loan was repaid during the three months ended March 31, 2019. The commercial real estate loan had a weighted average yield of 11.08% during the three months ended March 31, 2019 and continued to benefit from favorable fundamentals.

We have also invested in two joint ventures that invest in our target assets.

Portfolio Characteristics

The table below illustrates the vintage distribution of our non-Agency RMBS, GSE CRT and non-Agency CMBS portfolio as of March 31, 2019 as a percentage of the fair value:

	2003-2007		2008-2010		2011		2012		2013		2014		2015		2016		2017		2018		2019		Total
Prime	18.1	%	0.6	%	—%		—%		12.5	%	10.0	%	2.4	%	0.3	%	—%		15.1	%	6.2	%	65.2	%
Alt-A	26.2	%	—%		—%		—%		—%		—%		—%		—%		—%		—%		—%		26.2	%
Re-REMIC (1)	0.6	%	4.2	%	1.7	%	1.4	%	0.6	%	—%		—%		—%		—%		—%		—%		8.5	%
Subprime/RPL	0.1	%	—%		—%		—%		—%		—%		—%		—%		—%		—%		—%		0.1	%
Total Non-Agency	45.0	%	4.8	%	1.7	%	1.4	%	13.1	%	10.0	%	2.4	%	0.3	%	—	%	15.1	%	6.2	%	100.0	%
GSE CRT	—%		—%		—%		—%		27.4	%	31.8	%	5.7	%	20.3	%	3.3	%	6.2	%	5.3	%	100.0	%
Non-Agency CMBS	—%		2.5	%	16.4	%	10.9	%	12.0	%	31.9	%	7.8	%	3.2	%	8.2	%	4.8	%	2.3	%	100.0	%

(1) Reflects the year in which the re-securitizations were issued. The vintage distribution of the securities that collateralize our Re-REMIC investments is 4.5% for 2005, 1.8% for 2006, and 93.7% for 2007.

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The following table summarizes the credit enhancement provided to our Re-REMIC holdings as of March 31, 2019 and December 31, 2018.

	Percentage of Re-REMIC  Holdings at Fair Value
Re-REMIC Subordination(1)	March 31, 2019		December 31, 2018
0% - 10%	52.3	%	49.8	%
10% - 20%	3.4	%	3.4	%
20% - 30%	17.3	%	16.9	%
30% - 40%	12.9	%	14.9	%
40% - 50%	1.3	%	1.8	%
50% - 60%	12.4	%	12.5	%
60% - 70%	0.4	%	0.7	%
Total	100.0	%	100.0	%

(1) Subordination refers to the credit enhancement provided to the Re-REMIC tranche held by us by any junior Re-REMIC tranche or tranches in a resecuritization. This figure reflects the percentage of the balance of the underlying securities represented by any junior tranche or tranches at the time of resecuritization. Generally, principal losses on the underlying securities in excess of the subordination amount would result in principal losses on the Re-REMIC tranche held by us. As of March 31, 2019, 71.5% of our Re-REMIC holdings are not senior tranches.

The tables below represent the geographic concentration of the underlying collateral for our non-Agency RMBS, GSE CRT and non-Agency CMBS portfolio as of March 31, 2019:

Non-Agency RMBS State	Percentage		GSE CRT State	Percentage		Non-Agency CMBS State	Percentage
California	46.0	%	California	18.4	%	California	15.2	%
New York	8.5	%	Texas	6.2	%	New York	14.7	%
Florida	6.0	%	Florida	4.6	%	Texas	9.0	%
New Jersey	3.8	%	New York	4.4	%	Florida	6.5	%
Massachusetts	3.3	%	Virginia	4.2	%	Illinois	4.1	%
Virginia	2.9	%	Illinois	3.9	%	Pennsylvania	3.7	%
Washington	2.8	%	Washington	3.4	%	Ohio	3.1	%
Maryland	2.6	%	Massachusetts	3.3	%	Virginia	3.1	%
Colorado	2.6	%	New Jersey	3.3	%	Georgia	3.0	%
Illinois	2.4	%	Pennsylvania	3.1	%	New Jersey	3.0	%
Other	19.1	%	Other	45.2	%	Other	34.6	%
Total	100.0	%	Total	100.0	%	Total	100.0	%

Financing and Other Liabilities

We enter into repurchase agreements to finance the majority of our target assets. These agreements are secured by our mortgage-backed and credit risk transfer securities and an investment in a loan participation interest. Repurchase agreements are generally settled on a short-term basis, usually from one to twelve months, and bear interest at rates that have historically moved in close relationship to LIBOR. At each settlement date, we refinance each repurchase agreement at the market interest rate at that time. As of March 31, 2019, we had entered into repurchase agreements totaling $16.8 billion (December 31, 2018: $13.6 billion).

Our wholly-owned captive insurance subsidiary, IAS Services, is a member of the Federal Home Loan Bank of Indianapolis ("FHLBI"). As a member of the FHLBI, IAS Services has borrowed funds from the FHLBI in the form of secured loans. As of March 31, 2019, IAS Services had $1.65 billion in outstanding secured loans. For the three months ended March 31, 2019, IAS Services had weighted average borrowings of $1.65 billion with a weighted average borrowing rate of 2.70% and a weighted average maturity of 5.1 years.

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The following table presents the amount of collateralized borrowings outstanding under repurchase agreements and secured loans as of the end of each quarter, the average amount outstanding during the quarter and the maximum balance outstanding during the quarter:

$ in thousands	Collateralized borrowings under repurchase agreements and secured loans
Quarter Ended	Quarter-end balance	Average quarterly balance	Maximum balance of any quarter-end
March 31, 2018	15,561,137	15,536,093	15,561,137
June 30, 2018	15,352,321	15,275,972	15,352,321
September 30, 2018	16,028,518	15,973,428	16,078,388
December 31, 2018	15,252,484	15,836,597	16,144,062
March 31, 2019	18,474,387	17,229,809	18,474,387

In 2013, our wholly-owned subsidiary, IAS Operating Partnership LP, issued $400.0 million in aggregate principal amount of Exchangeable Senior Notes (the "Notes"). We retired a portion of the Notes prior to their maturity and fully retired the Notes upon their maturity on March 15, 2018. We utilized proceeds from repurchase agreement borrowings to retire the Notes.

We have invested in and partially funded our portion of a commitment in a loan participation. The remainder of our commitment under the agreement will be funded over the two year term of the loan based upon the financing needs of the borrower. As of March 31, 2019, we have unfunded commitments of $21.2 million.

We have also committed to invest up to $122.5 million in unconsolidated ventures that are sponsored by an affiliate of our Manager. As of March 31, 2019, $114.9 million of our commitment to these unconsolidated ventures has been called. We are committed to fund $7.6 million in additional capital to fund future investments and cover future expenses should they occur.

Hedging Instruments.

As of March 31, 2019, we have entered into interest rate swap agreements designed to mitigate the effects of increases in interest rates for a portion of our borrowings. Under these swap agreements, we pay fixed interest rates and receive floating interest rates indexed off of one- or three-month LIBOR, effectively fixing the floating interest rates on $12.9 billion (December 31, 2018: $12.4 billion) of borrowings. As of March 31, 2019, we received interest based on one-month LIBOR on $8.4 billion of our swaps and interest based on three-month LIBOR on $4.5 billion of our swaps.

During the three months ended March 31, 2019, we terminated existing swaps with a notional amount of $4.1 billion and entered into new swaps with a notional amount of $4.6 billion to hedge repurchase agreement debt associated with purchases of Agency RMBS and Agency CMBS securities during the quarter. Daily variation margin payment for interest rate swaps is characterized as settlement of the derivative itself rather than collateral and is recorded as a realized gain or loss in our condensed consolidated statement of operations. We realized a net loss of $165.9 million on interest rate swaps during the three months ended March 31, 2019 primarily due to falling interest rates in the first quarter of 2019.

As of March 31, 2019 we held $1.6 billion (December 31, 2018: $1.7 billion) in notional amount of futures contracts. During the three months ended March 31, 2019, we settled futures contracts with a notional amount of $1.7 billion and realized a net loss of $66.7 million due to falling interest rates in the first quarter of 2019. Daily variation margin payment for futures is characterized as settlement of the derivative itself rather than collateral and is recorded as a realized gain or loss in our condensed consolidated statement of operations.

We enter into currency forward contracts to help mitigate the potential impact of changes in foreign currency exchange rates on investments denominated in foreign currencies. During the three months ended March 31, 2019, we settled currency forward contracts of $23.1 million (March 31, 2018: $76.9 million) in notional amount and realized a net gain of $185,000 (March 31, 2018: $3.4 million net loss). As of March 31, 2019, we had $25.5 million (December 31, 2018: $23.1 million) of notional amount of forward contracts denominated in Euro related to our investment in an unconsolidated venture.

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Book Value per Common Share

We calculate book value per common share as follows:

	As of
In thousands except per share amounts	March 31, 2019		December 31, 2018
Numerator (adjusted equity):
Total equity	2,671,714		2,286,697
Less: Liquidation preference of Series A Preferred Stock	(140,000	)	(140,000	)
Less: Liquidation preference of Series B Preferred Stock	(155,000	)	(155,000	)
Less: Liquidation preference of Series C Preferred Stock	(287,500	)	(287,500	)
Total adjusted equity	2,089,214		1,704,197
Denominator (number of shares):
Common stock outstanding	128,267		111,585
Book value per common share	16.29		15.27

Our book value per common share increased 6.7% as of March 31, 2019 compared to December 31, 2018 primarily due to interest rate spread tightening in both Agency and credit assets. Refer to Item 3. "Quantitative and Qualitative Disclosures About Market Risk" for interest rate risk and its impact on fair value.

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Critical Accounting Policies

Our condensed consolidated financial statements are prepared in accordance with U.S. GAAP, which requires the use of estimates and assumptions that involve the exercise of judgment and use of assumptions as to future uncertainties. Accounting estimates and assumptions discussed in this section are those that we consider to be the most critical to an understanding of our financial statements because they involve significant judgments and uncertainties. All of these estimates reflect our best judgment about current, and for some estimates, future economic and market conditions and their effects based on information available as of the date of these financial statements. If conditions change from those expected, it is possible that the judgments and estimates described below could change, which may result in a change in valuation of our investment portfolio, future impairments of our MBS and GSE CRTs, change in our interest income recognition, allowance for loan losses, and a change in our tax liability among other effects.

There have been no significant changes to our critical accounting policies that are disclosed in our most recent Form 10-K for the year ended December 31, 2018.

Recent Accounting Standards

See Part I, Item 1, Financial Statements Note 2 - "Accounting Pronouncements Recently Adopted" and "Pending Accounting Pronouncements".

44

Results of Operations

The table below presents certain information from our condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands, except share data	2019		2018
Interest Income
Mortgage-backed and credit risk transfer securities	185,492		149,003
Commercial and other loans	1,582		4,222
Total interest income	187,074		153,225
Interest Expense
Repurchase agreements	101,875		59,585
Secured loans	11,144		6,927
Exchangeable senior notes	—		1,621
Total interest expense	113,019		68,133
Net interest income	74,055		85,092
Other Income (loss)
Gain (loss) on investments, net	268,382		(160,370	)
Equity in earnings (losses) of unconsolidated ventures	692		896
Gain (loss) on derivative instruments, net	(201,460	)	133,367
Realized and unrealized credit derivative income (loss), net	7,884		3,165
Net loss on extinguishment of debt	—		(26	)
Other investment income (loss), net	1,029		3,102
Total other income (loss)	76,527		(19,866	)
Expenses
Management fee – related party	9,534		10,221
General and administrative	2,258		1,756
Total expenses	11,792		11,977
Net income	138,790		53,249
Net income attributable to non-controlling interest	—		671
Net income attributable to Invesco Mortgage Capital Inc.	138,790		52,578
Dividends to preferred stockholders	11,107		11,107
Net income attributable to common stockholders	127,683		41,471
Earnings per share:
Net income (loss) attributable to common stockholders
Basic	1.05		0.37
Diluted	1.05		0.37
Weighted average number of shares of common stock:
Basic	121,097,686		111,629,105
Diluted	121,109,259		117,876,995

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Interest Income and Average Earning Asset Yields

The table below presents information related to our average earning assets and earning asset yields for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019		2018
Average Balances (1):
Agency RMBS:
15 year fixed-rate, at amortized cost	371,228		2,879,696
30 year fixed-rate, at amortized cost	11,780,005		7,830,802
ARM, at amortized cost	19,355		231,303
Hybrid ARM, at amortized cost	224,458		1,666,890
Agency - CMO, at amortized cost	291,914		273,884
Agency CMBS, at amortized cost	1,129,227		—
Non-Agency CMBS, at amortized cost	3,361,132		3,193,575
Non-Agency RMBS, at amortized cost	1,084,721		1,084,584
GSE CRT, at amortized cost	808,296		776,742
Loan participation interest	54,763		—
Commercial loans, at amortized cost	27,375		193,540
Average earning assets	19,152,474		18,131,016
Average Earning Asset Yields (2):
Agency RMBS:
15 year fixed-rate	3.50	%	2.04	%
30 year fixed-rate	3.38	%	2.96	%
ARM	3.70	%	2.32	%
Hybrid ARM	3.47	%	2.24	%
Agency - CMO	3.56	%	2.51	%
Agency CMBS	3.52	%	—	%
Non-Agency CMBS	4.98	%	4.85	%
Non-Agency RMBS	6.71	%	7.08	%
GSE CRT (3)	3.67	%	3.00	%
Loan participation interest	6.14	%	—	%
Commercial loans	11.08	%	8.85	%
Average earning asset yields	3.91	%	3.38	%

(1) Average balances for each period are based on weighted month-end average earning assets.

(2) Average earning asset yields for the period were calculated by dividing interest income, including amortization of premiums and discounts, by the average month-end earning assets based on the amortized cost of the investments. All yields are annualized.

(3) GSE CRT average earning asset yields exclude coupon interest associated with embedded derivatives on securities not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net under U.S. GAAP.

Our primary source of income is interest earned on our investment portfolio. We had average earning assets of approximately $19.2 billion for the three months ended March 31, 2019 (March 31, 2018: $18.1 billion). Average earning assets increased for the three months ended March 31, 2019 primarily because we invested $258.6 million in net proceeds from common stock issuances and $168.1 million in proceeds from commercial loan repayments in 2018 and the first quarter of 2019 into newly issued 30 year fixed-rate Agency RMBS and Agency CMBS securities.

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We earned total interest income of $187.1 million (March 31, 2018: $153.2 million) for the three months ended March 31, 2019. Our interest income includes coupon interest and net premium amortization on MBS and GSE CRTs as well as interest income on commercial and other loans as shown in the table below.

	Three Months Ended March 31,
$ in thousands	2019		2018
Interest Income
MBS and GSE CRT - coupon interest	192,442		166,319
MBS and GSE CRT - net premium amortization	(6,950	)	(17,316	)
MBS and GSE CRT - interest income	185,492		149,003
Commercial and other loans	1,582		4,222
Total interest income	187,074		153,225

MBS and GSE CRT interest income increased $36.5 million for the three months ended March 31, 2019 compared to 2018 primarily due to higher average earnings assets and lower net premium amortization. Net premium amortization decreased $10.4 million for the three months ended March 31, 2019 compared to 2018 primarily due to slower prepayment speeds on 30 year fixed-rate Agency RMBS and purchases of non-Agency CMBS securities at a discount over the last twelve months.

Interest income on our commercial and other loans decreased $2.6 million during the three months ended March 31, 2019 primarily due to commercial loan repayments over the past twelve months. The balance of our commercial loans held-for-investment decreased to $24.5 million as of March 31, 2019 compared to $184.3 million as of March 31, 2018.

Our average earning asset yields increased 53 basis points during the three months ended March 31, 2019 compared to 2018 due to purchases of new securities at higher yields, slower prepayment speeds and higher index rates on floating and adjustable assets.

Prepayment Speeds

Our RMBS and GSE CRT portfolio is subject to inherent prepayment risk primarily driven by changes in interest rates, which impacts the amount of premium and discount on the purchase of these securities that is recognized into interest income. Expected future prepayment speeds on our RMBS and GSE CRT portfolio are estimated on a quarterly basis. Generally, in an environment of falling interest rates, prepayment speeds will increase as homeowners are more likely to prepay their existing mortgage and refinance into a lower borrowing rate. If the actual prepayment speed during the period is faster than estimated, the amortization on securities purchased at a premium to par value will be accelerated, resulting in lower interest income recognized. Conversely, for securities purchased at a discount to par value, interest income will be reduced in periods where prepayment speeds were slower than expected. The standard measure of prepayment speeds is the constant prepayment rate, also known as the conditional prepayment rate or "CPR". CPR measures prepayments as a percentage of the current outstanding loan balance and is expressed as a compound annual rate. The table below provides the three month constant prepayment rate for our RMBS and GSE CRTs as of March 31, 2019, December 31, 2018, September 30, 2018 and June 30, 2018.

	As of
	March 31, 2019	December 31, 2018	September 30, 2018	June 30, 2018
15 year fixed-rate Agency RMBS	7.1	8.8	10.9	10.6
30 year fixed-rate Agency RMBS	4.9	6.2	7.4	8.2
ARM/ Hybrid ARM Agency RMBS	15.7	13.8	16.6	15.7
Non-Agency RMBS	8.3	9.1	10.5	12.0
GSE CRT	6.6	8.7	10.9	9.8
Weighted average CPR	5.7	7.3	8.9	10.2

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The following table presents net premium amortization recognized on our MBS and GSE CRT portfolio for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands, except share data	2019		2018
Agency RMBS and Agency CMBS	(12,725	)	(23,222	)
Non-Agency CMBS	3,031		1,426
Non-Agency RMBS	3,922		5,177
GSE CRT	(1,178	)	(697	)
Net (premium amortization) discount accretion	(6,950	)	(17,316	)

Net premium amortization decreased compared to the same period in 2018 primarily due to slower prepayment speeds on 30 year fixed-rate Agency RMBS in the three months ended March 31, 2019 and purchases of non-Agency CMBS securities at a discount over the last 12 months.

Our interest income is subject to interest rate risk. Refer to Item 3. "Quantitative and Qualitative Disclosures about Market Risk" for more information relating to interest rate risk and its impact on our operating results.

Interest Expense and the Cost of Funds

The table below presents the components of interest expense for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
$ in thousands	2019		2018
Interest Expense
Interest expense on repurchase agreement borrowings	107,726		66,124
Amortization of net deferred (gain) loss on de-designated interest rate swaps	(5,851	)	(6,539	)
Repurchase agreements interest expense	101,875		59,585
Secured loans	11,144		6,927
Exchangeable senior notes	—		1,621
Total interest expense	113,019		68,133

We enter into repurchase agreements to finance the majority of our target assets. These agreements are secured by our mortgage-backed and credit risk transfer securities. These agreements are generally settled on a short-term basis, usually from one to twelve months, and bear interest at rates that have historically moved in close relationship to LIBOR. At each settlement date, we typically refinance each repurchase agreement at the market interest rate at that time.

Our interest expense on repurchase agreement borrowings rose $41.6 million for the three months ended March 31, 2019 compared to 2018 due to higher average borrowings and increases in the federal funds rate over the past twelve months. We increased our average borrowings in the first quarter of 2019 after investing $258.6 million in net proceeds from common stock issuances and $168.1 million in proceeds from commercial loan repayments in 2018 and the first quarter of 2019 into newly issued 30 year fixed-rate Agency RMBS and Agency CMBS securities.

Our repurchase agreement interest expense as reported in our condensed consolidated statement of operations includes amortization of net deferred gains and losses on de-designated interest rate swaps as summarized in the table above. Amortization of net deferred gains on de-designated interest rate swaps decreased our total interest expense by $5.9 million during the three months ended March 31, 2019 and $6.5 million during the three months ended March 31, 2018. Amounts recorded in AOCI before we discontinued cash flow hedge accounting for our interest rate swaps are reclassified to interest expense on repurchase agreements on the condensed consolidated statements of operations as interest is accrued and paid on the related repurchase agreements over the remaining life of the interest rate swap agreements. During the next twelve months, we estimate that $23.8 million of net deferred gains on de-designated interest rate swaps will be reclassified from other comprehensive income and recorded as a decrease to interest expense.

During the three months ended March 31, 2019, interest expense for our secured loans increased $4.2 million compared to the same period in 2018 due to higher borrowing rates. Borrowing rates on our secured loans are based on the three-month FHLB swap rate plus a spread. For the three months ended March 31, 2019, the weighted average borrowing rate on our secured loans was 2.70% as compared to 1.68% for the three months ended March 31, 2018.

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During the three months ended March 31, 2019, interest expense on exchangeable senior notes decreased $1.6 millioncompared to the same period in 2018 because the Notes were retired on March 15, 2018.

Our total interest expense during the three months ended March 31, 2019 increased $44.9 million from the same period in 2018 primarily due to the $45.8 million increase in interest expense on repurchase agreements borrowings and secured loans in the 2019 period offset by a $1.6 million decrease in interest expense on the Notes as discussed above.

The table below presents information related to our borrowings and cost of funds for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
$ in thousands	2019		2018
Average Borrowings(1):
Agency RMBS (2)	11,664,156		11,427,614
Agency CMBS	1,074,917		—
Non-Agency CMBS (2)	2,663,941		2,542,722
Non-Agency RMBS	886,554		891,202
GSE CRT	717,482		674,555
Exchangeable senior notes	—		116,176
Loan participation interest	41,072		—
Total average borrowings	17,048,122		15,652,269
Maximum borrowings during the period (3)	18,474,387		15,674,202
Average Cost of Funds (4):
Agency RMBS (2)	2.59	%	1.65	%
Agency CMBS	2.64	%	—	%
Non-Agency CMBS (2)	3.24	%	2.28	%
Non-Agency RMBS	3.54	%	2.91	%
GSE CRT	3.49	%	2.87	%
Exchangeable senior notes	—	%	5.58	%
Loan participation interest	4.15	%	—	%
Cost of funds	2.65	%	1.74	%
Effective cost of funds (non-GAAP measure) (5)	2.68	%	2.22	%

(1) Average borrowings for each period are based on weighted month-end balances.

(2) Agency RMBS and non-Agency CMBS average borrowings and average cost of funds include borrowings under repurchase agreements and secured loans.

(3) Amount represents the maximum borrowings at month-end during each of the respective periods.

(4) Average cost of funds is calculated by dividing annualized interest expense excluding amortization of net deferred gain (loss) on de-designated interest rate swaps by our average borrowings.

(5) For a reconciliation of cost of funds to effective cost of funds, see "Non-GAAP Financial Measures."

Total average borrowings rose $1.4 billion in the three months ended March 31, 2019 compared to 2018 primarily because we entered into repurchase agreements to finance our increased holdings of 30 year fixed-rate Agency RMBS, Agency CMBS and non-Agency CMBS. The increase in our average cost of funds for three months ended March 31, 2019 versus 2018 was primarily due to increases in the federal funds rate over the past twelve months.

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Net Interest Income

The table below presents the components of net interest income for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
$ in thousands	2019		2018
Interest Income
Mortgage-backed and credit risk transfer securities	185,492		149,003
Commercial and other loans	1,582		4,222
Total interest income	187,074		153,225
Interest Expense
Interest expense on repurchase agreement borrowings	107,726		66,124
Amortization of net deferred (gain) loss on de-designated interest rate swaps	(5,851	)	(6,539	)
Repurchase agreements interest expense	101,875		59,585
Secured loans	11,144		6,927
Exchangeable senior notes	—		1,621
Total interest expense	113,019		68,133
Net interest income	74,055		85,092
Net interest rate margin	1.26	%	1.64	%

Our net interest income, which equals interest income less interest expense, totaled $74.1 million (March 31, 2018: $85.1 million) for the three months ended March 31, 2019. The decrease in net interest income for the three months ended March 31, 2019 was primarily due to an increase in interest expense driven by higher average borrowings and borrowing rates exceeding the increase in interest income on higher average earning assets.

Our net interest rate margin, which equals the yield on our average assets for the period less the average cost of funds for the period, was 1.26% (March 31, 2018: 1.64%) for the three months ended March 31, 2019. The decrease in net interest rate margin for the three months ended March 31, 2019 compared to the same periods in 2018 was primarily due to increases in the federal funds rate in 2018 that had a greater impact on our average cost of funds than on our average earning asset yields. Our cost of funds on all of our borrowings is influenced by changes in short term interest rates, whereas approximately 91% of the Company’s investments were fixed rate assets as of March 31, 2019.

Gain (Loss) on Investments, net

The table below summarizes the components of gain (loss) on investments, net for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
$ in thousands	2019		2018
Net realized gains (losses) on sale of investments	(11,115	)	(9,237	)
Other-than-temporary impairment losses	(1,776	)	(4,359	)
Net unrealized gains (losses) on MBS accounted for under the fair value option	280,039		(147,195	)
Net unrealized gains (losses) on GSE CRT accounted for under the fair value option	1,234		434
Net unrealized gains (losses) on trading securities	—		(13	)
Gain (loss) on investments, net	268,382		(160,370	)

As part of our investment process, our mortgage-backed and credit risk transfer securities are continuously reviewed to determine if they continue to meet our risk and return targets. This process involves looking at changing market assumptions and the impact those assumptions will have on the individual securities. During the three months ended March 31, 2019, we continued to actively manage our investment portfolio and sold most of our ARM and Hybrid ARM securities. We sold $745.9 million of mortgage-backed securities (March 31, 2018: $198.5 million) and realized net losses of $11.1 million (March 31, 2018: net losses of $9.2 million).

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We assess our investment securities for other-than-temporary impairment on a quarterly basis. Our determination of whether a security is other-than-temporarily impaired involves judgment and assumptions based on subjective and objective factors. We consider (i) whether we intend to sell the security and whether it is more likely than not that we will be required to sell the security before recovery of its amortized cost and (ii) the financial condition and near-term prospects of recovery in fair value of the security. This includes a determination of estimated future cash flows through an evaluation of the characteristics of the underlying loans and the structural features of the investment. When the fair value of an investment is less than its amortized cost at the balance sheet date of the reporting period for which impairment is assessed, the impairment is designated as either "temporary" or "other-than-temporary." For additional information regarding our assessment analysis of other-than temporary impairment on our investment securities, refer to Note 4 – “Mortgage-Backed and Credit Risk Transfer Securities” of our condensed consolidated financial statements.

We have elected the fair value option for all of our RMBS IOs, our MBS purchased on or after September 1, 2016 and our GSE CRTs purchased on or after August 24, 2015. Under the fair value option, changes in fair value are recognized in income in the condensed consolidated statements of operations and are reported as a component of gain (loss) on investments, net. As of March 31, 2019, $16.1 billion (December 31, 2018: $11.6 billion) or 76% (December 31, 2018: 67%) of our MBS and GSE CRT are accounted for under the fair value option. We recorded net unrealized gains on our MBS portfolio accounted for under the fair value option of $280.0 million in the three months ended March 31, 2019 compared to net losses of $147.2 million in the three months ended March 31, 2018. Net unrealized gains in the three months ended March 31, 2019 reflect tighter interest rate spreads across the Company's credit assets and Agency CMBS, and valuation gains in the Company's specified pool Agency RMBS. Most of our holdings of 30 year fixed-rate Agency RMBS are in specified pools with attractive prepayment characteristics.

Equity in Earnings (Losses) of Unconsolidated Ventures

For the three months ended March 31, 2019, we recorded equity in earnings of unconsolidated ventures of $692,000 (March 31, 2018: equity in earnings of $896,000). We recorded equity in earnings for the three months ended March 31, 2019 and 2018 primarily due to realized and unrealized gains on the underlying portfolio investments.

Gain (Loss) on Derivative Instruments, net

Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements on our floating rate repurchase agreements and secured loans. To accomplish these objectives, we primarily use interest rate derivative instruments, including interest rate swaps, interest rate swaptions, U.S. Treasury futures contracts and TBAs as part of our interest rate risk management strategy.

We also use currency forward contracts to help mitigate the potential impact of changes in foreign currency exchange rates on our investments denominated in foreign currencies.

The tables below summarize our realized and unrealized gain (loss) on derivative instruments, net for the following periods:

$ in thousands	Three months ended March 31, 2019
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)	Unrealized gain (loss), net	Gain (loss) on derivative instruments, net
Interest Rate Swaps	(165,884	)	4,509	12,991	(148,384	)
Futures Contracts	(66,688	)	—	12,944	(53,744	)
Currency Forward Contracts	185		—	483	668
Total	(232,387	)	4,509	26,418	(201,460	)

$ in thousands	Three months ended March 31, 2018
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)		Unrealized gain (loss), net		Gain (loss) on derivative instruments, net
Interest Rate Swaps	122,273		(12,112	)	32,374		142,535
Futures Contracts	(5,277	)	—		(1,612	)	(6,889	)
Currency Forward Contracts	(3,418	)	—		1,139		(2,279	)
Total	113,578		(12,112	)	31,901		133,367

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As of March 31, 2019 and December 31, 2018, we held the following interest rate swaps whereby we receive interest at a one-month and three-month LIBOR rate:

$ in thousands	As of March 31, 2019						As of December 31, 2018
Derivative instrument	Notional Amounts	Average Fixed Pay Rate		Average Receive Rate		Average Maturity (Years)	Notional Amounts	Average Fixed Pay Rate		Average Receive Rate		Average Maturity (Years)
Interest Rate Swaps	12,895,000	2.37	%	2.55	%	4.4	12,370,000	2.46	%	2.55	%	3.7

During the three months ended March 31, 2019, we terminated existing swaps with a notional amount of $4.1 billion and entered into new swaps with a notional amount of $4.6 billion to hedge repurchase agreement debt associated with purchases of Agency RMBS and Agency CMBS securities during the quarter. Daily variation margin payment for interest rate swaps is characterized as settlement of the derivative itself rather than collateral and is recorded as a realized gain or loss in our condensed consolidated statement of operations. We realized a net loss of $165.9 million on interest rate swaps during the three months ended March 31, 2019 primarily due to falling interest rates in the first quarter of 2019.

As of March 31, 2019 we held $1.6 billion (December 31, 2018: $1.7 billion) in notional amount of futures contracts. During the three months ended March 31, 2019, we settled futures contracts with a notional amount of $1.7 billion and realized a net loss of $66.7 million due to falling interest rates in the first quarter of 2019. Daily variation margin payment for futures is characterized as settlement of the derivative itself rather than collateral and is recorded as a realized gain or loss in our condensed consolidated statement of operations.

Realized and Unrealized Credit Derivative Income (Loss), net

The table below summarizes the components of realized and unrealized credit derivative income (loss), net for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019	2018
GSE CRT embedded derivative coupon interest	5,350	5,633
Change in fair value of GSE CRT embedded derivatives	2,534	(2,468	)
Total realized and unrealized credit derivative income (loss), net	7,884	3,165

In the three months ended March 31, 2019, we recorded an increase of $4.7 million in realized and unrealized credit derivative income (loss), net compared to the same period in 2018 because the increases in the valuation of the GSE CRT debt host contracts exceeded the increases in valuation of the hybrid financial instruments.

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Net Loss on Extinguishment of Debt

We fully retired our Exchangeable Senior Notes (the "Notes") upon their maturity on March 15, 2018 and recognized a net loss on extinguishment of debt of $26,000.

Other Investment Income (Loss), net

Our other investment income (loss), net during the three months ended March 31, 2019 consists of quarterly dividends from FHLBI stock. Our other investment income (loss), net during the three months ended March 31, 2018 consisted of (i) quarterly dividends from FHLBI stock and an investment in an exchange-traded fund, and (ii) foreign exchange rate gains and losses related to a commercial loan investment denominated in a foreign currency. The table below summarizes the components of other investment income (loss), net for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019	2018
Dividend income	1,029	1,288
Gain (loss) on foreign currency transactions, net	—	1,814
Total	1,029	3,102

We are required to purchase and hold a certain amount of FHLBI stock, which is based, in part, upon the outstanding principal balance of secured advances from the FHLBI. We earn dividend income on our investment in FHLBI stock, and the amount of our dividend income varies based upon the number of shares that we are required to own and the dividend declared per share.

We incurred foreign exchange gains on the revaluation of a commercial loan investment (notional amount of £34.5 million) for the three months ended March 31, 2018 due to the fluctuation in the Pound Sterling/ U.S. Dollar foreign exchange rate. The loan was repaid in the third quarter of 2018. We enter into currency forward contracts as an economic hedge against our foreign currency exposure. Changes in the fair value of our currency forward contracts are recognized in gain (loss) derivative instruments, net in the condensed consolidated statements of operations. During the three months ended March 31, 2018, we recognized net losses of $2.3 million on our currency forward contracts.

Expenses

We incurred management fees of $9.5 million (March 31, 2018: $10.2 million) for the three months ended March 31, 2019. Management fees decreased for the three ended March 31, 2019 compared to the same periods in 2018 primarily due to a lower shareholders' equity management fee base in 2019. Refer to Note 11 – "Related Party Transactions" of our condensed consolidated financial statements for a discussion of our relationship with our Manager and a description of how our fees are calculated.

Our general and administrative expenses not covered under our management agreement amounted to $2.3 million (March 31, 2018: $1.8 million) for the three months ended March 31, 2019. General and administrative expenses not covered under our management agreement primarily consist of directors and officers insurance, legal costs, accounting, auditing and tax services, filing fees, and miscellaneous general and administrative costs. General and administrative costs were higher for the three months ended March 31, 2019 versus 2018 primarily due to higher fees for derivative transactions in the 2019 period and the write-off of previously deferred costs associated with the Company's at-the-market program.

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Net Income (Loss) attributable to Common Stockholders

For the three months ended March 31, 2019, our net income attributable to common stockholders was $127.7 million (March 31, 2018: $41.5 million net income attributable to common stockholders) or $1.05 basic and diluted net income per average share available to common stockholders (March 31, 2018: $0.37 basic and diluted net income per average share available to common stockholders). The change in net income attributable to common stockholders was primarily due to (i) a net gain on investments of $268.4 million in the 2019 period compared to a net loss on investments of $160.4 million in the 2018 period, (ii) a net loss on derivative instruments of $201.5 million in the 2019 period compared to a net gain on derivative instruments of $133.4 million in the 2018 period, (iii) credit derivative net income of $7.9 million in the 2019 period compared to credit derivative net income of $3.2 million in the 2018 period and (iv) a $11.0 million decrease in net interest income.

For further information on the changes in net gain (loss) on investments, net gains (loss) on derivative instruments, realized and unrealized credit derivative income (loss), net and net interest income, see preceding discussion under "Gain (Loss) on Investments, net," "Gain (Loss) on Derivative Instruments, net," "Realized and Unrealized Credit Derivative Income (Loss), net," and "Net Interest Income."

Non-GAAP Financial Measures

We use the following non-GAAP financial measures to analyze the Company's operating results and believe these financial measures are useful to investors in assessing our performance as further discussed below:

• core earnings (and by calculation, core earnings per common share),

• effective interest income (and by calculation, effective yield),

• effective interest expense (and by calculation, effective cost of funds),

• effective net interest income (and by calculation, effective interest rate margin), and

• repurchase agreement debt-to-equity ratio. 

The most directly comparable U.S. GAAP measures are:

• net income (loss) attributable to common stockholders (and by calculation, basic earnings (loss) per common share),

• total interest income (and by calculation, earning asset yields),

• total interest expense (and by calculation, cost of funds),

• net interest income (and by calculation, net interest rate margin), and

• debt-to-equity ratio. 

The non-GAAP financial measures used by management should be analyzed in conjunction with U.S. GAAP financial measures and should not be considered substitutes for U.S. GAAP financial measures. In addition, the non-GAAP financial measures may not be comparable to similarly titled non-GAAP financial measures of our peer companies.

Core Earnings

We calculate core earnings as U.S. GAAP net income (loss) attributable to common stockholders adjusted for (gain) loss on investments, net; realized (gain) loss on derivative instruments, net; unrealized (gain) loss on derivative instruments, net; realized and unrealized (gain) loss on GSE CRT embedded derivatives, net; (gain) loss on foreign currency transactions, net; amortization of net deferred (gain) loss on de-designated interest rate swaps; net loss on extinguishment of debt; and cumulative adjustments attributable to non-controlling interest. We may add and have added additional reconciling items to our core earnings calculation as appropriate.

We believe the presentation of core earnings provides a consistent measure of operating performance by excluding the impact of gains and losses described above from operating results. We exclude the impact of gains and losses because gains and losses are not accounted for consistently under U.S. GAAP. Under U.S. GAAP, certain gains and losses are reflected in net income whereas other gains and losses are reflected in other comprehensive income. For example, a portion of our mortgage-backed securities are classified as available-for-sale securities, and we record changes in the valuation of these securities in other comprehensive income on our condensed consolidated balance sheets. We elected the fair value option for our mortgage-backed securities purchased on or after September 1, 2016, and changes in the valuation of these securities are recorded in

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other income (loss) in our condensed consolidated statements of operations. In addition, certain gains and losses represent one-time events.

We believe that providing transparency into core earnings enables our investors to consistently measure, evaluate and compare our operating performance to that of our peers over multiple reporting periods. However, we caution that core earnings should not be considered as an alternative to net income (determined in accordance with U.S. GAAP), or as an indication of our cash flow from operating activities (determined in accordance with U.S. GAAP), a measure of our liquidity, or as an indication of amounts available to fund our cash needs, including our ability to make cash distributions.

The table below provides a reconciliation of U.S. GAAP net income (loss) attributable to common stockholders to core earnings for the following periods:

	Three Months Ended March 31,
$ in thousands, except per share data	2019		2018
Net income attributable to common stockholders	127,683		41,471
Adjustments:
(Gain) loss on investments, net	(268,382	)	160,370
Realized (gain) loss on derivative instruments, net (1)	232,387		(113,578	)
Unrealized (gain) loss on derivative instruments, net (1)	(26,418	)	(31,901	)
Realized and unrealized (gain) loss on GSE CRT embedded derivatives, net (2)	(2,534	)	2,468
(Gain) loss on foreign currency transactions, net (3)	—		(1,814	)
Amortization of net deferred (gain) loss on de-designated interest rate swaps(4)	(5,851	)	(6,539	)
Net loss on extinguishment of debt	—		26
Subtotal	(70,798	)	9,032
Cumulative adjustments attributable to non-controlling interest	—		(114	)
Core earnings attributable to common stockholders	56,885		50,389
Basic income per common share	1.05		0.37
Core earnings per share attributable to common stockholders (5)	0.47		0.45

(1) U.S. GAAP gain (loss) on derivative instruments, net on the condensed consolidated statements of operations includes the following components:

	Three Months Ended March 31,
$ in thousands	2019		2018
Realized gain (loss) on derivative instruments, net	(232,387	)	113,578
Unrealized gain (loss) on derivative instruments, net	26,418		31,901
Contractual net interest income (expense) on interest rate swaps	4,509		(12,112	)
Gain (loss) on derivative instruments, net	(201,460	)	133,367

(2) U.S. GAAP realized and unrealized credit derivative income (loss), net on the condensed consolidated statements of operations includes the following components:

	Three Months Ended March 31,
$ in thousands	2019	2018
Realized and unrealized gain (loss) on GSE CRT embedded derivatives, net	2,534	(2,468	)
GSE CRT embedded derivative coupon interest	5,350	5,633
Realized and unrealized credit derivative income (loss), net	7,884	3,165

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(3) U.S. GAAP other investment income (loss) net on the condensed consolidated statements of operations includes the following components:

	Three Months Ended March 31,
$ in thousands	2019	2018
Dividend income	1,029	1,288
Gain (loss) on foreign currency transactions, net	—	1,814
Other investment income (loss), net	1,029	3,102

(4) U.S. GAAP repurchase agreements interest expense on the condensed consolidated statements of operations includes the following components:

	Three Months Ended March 31,
$ in thousands	2019		2018
Interest expense on repurchase agreements borrowings	107,726		66,124
Amortization of net deferred (gain) loss on de-designated interest rate swaps	(5,851	)	(6,539	)
Repurchase agreements interest expense	101,875		59,585

(5) Core earnings per share attributable to common stockholders is equal to core earnings divided by the basic weighted average number of common shares outstanding.

The components of core income for the three months ended March 31, 2019 are:

	Three Months Ended March 31,
$ in thousands	2019		2018
Effective net interest income(1)	78,063		72,074
Dividend income	1,029		1,288
Equity in earnings (losses) of unconsolidated ventures	692		896
Total expenses	(11,792	)	(11,977	)
Total core earnings	67,992		62,281
Dividends to preferred stockholders	(11,107	)	(11,107	)
Core earnings attributable to non-controlling interest	—		(785	)
Core earnings attributable to common stockholders	56,885		50,389

(1) See below for a reconciliation of net interest income to effective net interest income, a non-GAAP measure.

Core earnings increased $6.5 million in the three months ended March 31, 2019 compared to the same period in 2018 primarily due to a $6.0 million increase in effective net interest income driven by lower effective net interest expense. See below for a discussion of the increase in effective net interest income in the three months ended March 31, 2019 compared to the same period in 2018.

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Effective Interest Income / Effective Yield / Effective Interest Expense / Effective Cost of Funds / Effective Net Interest Income / Effective Interest Rate Margin

We calculate effective interest income (and by calculation, effective yield) as U.S. GAAP total interest income adjusted for GSE CRT embedded derivative coupon interest that is recorded as realized and unrealized credit derivative income (loss), net. We include our GSE CRT embedded derivative coupon interest in effective interest income because GSE CRT coupon interest is not accounted for consistently under U.S. GAAP. We account for GSE CRTs purchased prior to August 24, 2015 as hybrid financial instruments, but we have elected the fair value option for GSE CRTs purchased on or after August 24, 2015. Under U.S. GAAP, coupon interest on GSE CRTs accounted for using the fair value option is recorded as interest income, whereas coupon interest on GSE CRTs accounted for as hybrid financial instruments is recorded as realized and unrealized credit derivative income (loss). We add back GSE CRT embedded derivative coupon interest to our total interest income because we consider GSE CRT embedded derivative coupon interest a current component of our total interest income irrespective of whether we elected the fair value option for the GSE CRT or accounted for the GSE CRT as a hybrid financial instrument.

We calculate effective interest expense (and by calculation, effective cost of funds) as U.S. GAAP total interest expense adjusted for contractual net interest income (expense) on our interest rate swaps that is recorded as gain (loss) on derivative instruments, net and the amortization of net deferred gains (losses) on de-designated interest rate swaps that is recorded as repurchase agreements interest expense. We view our interest rate swaps as an economic hedge against increases in future market interest rates on our floating rate borrowings. We add back the net payments we make on our interest rate swap agreements to our total U.S. GAAP interest expense because we use interest rate swaps to add stability to interest expense. We exclude the amortization of net deferred gains (losses) on de-designated interest rate swaps from our calculation of effective interest expense because we do not consider the amortization a current component of our borrowing costs.

We calculate effective net interest income (and by calculation, effective interest rate margin) as U.S. GAAP net interest income adjusted for net interest income (expense) on our interest rate swaps that is recorded as gain (loss) on derivative instruments, amortization of net deferred gains (losses) on de-designated interest rate swaps that is recorded as repurchase agreements interest expense and GSE CRT embedded derivative coupon interest that is recorded as realized and unrealized credit derivative income (loss), net.

We believe the presentation of effective interest income, effective yield, effective interest expense, effective cost of funds, effective net interest income and effective interest rate margin measures, when considered together with U.S. GAAP financial measures, provide information that is useful to investors in understanding our borrowing costs and operating performance.

The following tables reconcile total interest income to effective interest income and yield to effective yield for the following periods:

	Three Months Ended March 31,
	2019			2018
$ in thousands	Reconciliation	Yield/Effective Yield		Reconciliation	Yield/Effective Yield
Total interest income	187,074	3.91	%	153,225	3.38	%
Add: GSE CRT embedded derivative coupon interest recorded as realized and unrealized credit derivative income (loss), net	5,350	0.11	%	5,633	0.12	%
Effective interest income	192,424	4.02	%	158,858	3.50	%

Our effective interest income increased in the three months ended March 31, 2019 versus the same periods in 2018 primarily due to higher average earning assets and higher effective yield. Our average earning assets increased to $19.2 billion for the three month period ended March 31, 2019 from $18.1 billion for the same period in 2018 primarily because we invested $258.6 million in net proceeds from common stock issuances and $168.1 million in proceeds from commercial loan repayments in 2018 and the first quarter of 2019 into newly issued 30 year fixed-rate Agency RMBS and Agency CMBS securities. The increase in effective yield for the three months ended March 31, 2019 compared to the same period in 2018 was primarily due to slower prepayment speeds and higher index rates on floating and adjustable rate assets.

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The following tables reconcile total interest expense to effective interest expense and cost of funds to effective cost of funds for the following periods.

	Three Months Ended March 31,
	2019				2018
$ in thousands	Reconciliation		Cost of Funds / Effective Cost of Funds		Reconciliation	Cost of Funds / Effective Cost of Funds
Total interest expense	113,019		2.65	%	68,133	1.74	%
Add (Less): Amortization of net deferred gain (loss) on de-designated interest rate swaps	5,851		0.14	%	6,539	0.17	%
Add (Less): Contractual net interest expense (income) on interest rate swaps recorded as gain (loss) on derivative instruments, net	(4,509	)	(0.11	)%	12,112	0.31	%
Effective interest expense	114,361		2.68	%	86,784	2.22	%

Our effective interest expense and effective cost of funds increased during the three months ended March 31, 2019 compared to the same period in 2018 primarily due to increased borrowings and higher interest rates. See the preceding caption "Interest Expense and Cost of Funds" for further discussion of these variances.

The following tables reconcile net interest income to effective net interest income and net interest rate margin to effective interest rate margin for the following periods.

	Three Months Ended March 31,
	2019				2018
$ in thousands	Reconciliation		Net Interest Rate Margin / Effective Interest Rate Margin		Reconciliation		Net Interest Rate Margin / Effective Interest Rate Margin
Net interest income	74,055		1.26	%	85,092		1.64	%
Add (Less): Amortization of net deferred (gain) loss on de-designated interest rate swaps	(5,851	)	(0.14	)%	(6,539	)	(0.17	)%
Add: GSE CRT embedded derivative coupon interest recorded as realized and unrealized credit derivative income (loss), net	5,350		0.11	%	5,633		0.12	%
Add (Less): Contractual net interest income (expense) on interest rate swaps recorded as gain (loss) on derivative instruments, net	4,509		0.11	%	(12,112	)	(0.31	)%
Effective net interest income	78,063		1.34	%	72,074		1.28	%

Effective net interest income for the three months ended March 31, 2019 increased primarily due to higher effective net interest expense. We earned contractual net interest income on interest rate swaps of $4.5 million in the three months ended March 31, 2019 compared to incurring contractual net interest expense of $12.1 million in the three months ended March 31, 2018 primarily as a result of higher LIBOR rates in 2019.

Effective interest rate margin increased for the three months ended March 31, 2019 compared to the same periods in 2018 primarily due to increases in the federal funds rate over the past twelve months that had a greater impact on our average earning asset yields than on our average cost of funds.

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Repurchase Agreement Debt-to-Equity Ratio

The tables below show the allocation of our equity to our target assets, our debt-to-equity ratio, and our repurchase agreement debt-to-equity ratio as of March 31, 2019 and December 31, 2018. Our debt-to-equity ratio is calculated in accordance with U.S. GAAP and is the ratio of total debt (sum of repurchase agreements, secured loans and exchangeable senior notes) to total equity. We present a repurchase agreement debt-to-equity ratio, a non-GAAP financial measure of leverage, because the mortgage REIT industry primarily uses repurchase agreements, which typically mature within one year, to finance investments. We believe that presenting our repurchase agreement debt-to-equity ratio, when considered together with our U.S. GAAP financial measure of debt-to-equity ratio, provides information that is useful to investors in understanding our refinancing risks, and gives investors a comparable statistic to those other mortgage REITs who almost exclusively borrow using short-term repurchase agreements that are subject to refinancing risk.

March 31, 2019

$ in thousands	Agency RMBS and Agency CMBS		Commercial Credit (1)		Residential Credit (2)	Total
Mortgage-backed and credit risk transfer securities	15,577,369		3,455,805		2,094,424	21,127,598
Cash and cash equivalents (3)	39,708		25,869		12,905	78,482
Restricted cash	5,025		—		—	5,025
Derivative assets, at fair value (4)	26,268		312		—	26,580
Other assets	91,933		109,886		59,883	261,702
Total assets	15,740,303		3,591,872		2,167,212	21,499,387
Repurchase agreements	13,508,022		1,642,106		1,674,259	16,824,387
Secured loans (5)	581,896		1,068,104		—	1,650,000
Derivative liabilities, at fair value (4)	8,463		—		—	8,463
Other liabilities	300,843		28,468		15,512	344,823
Total liabilities	14,399,224		2,738,678		1,689,771	18,827,673
Total equity (allocated)	1,341,079		853,194		477,441	2,671,714
Adjustments to calculate repurchase agreement debt-to-equity ratio:
Net equity in unsecured assets (6)	—		(48,583	)	—	(48,583	)
Collateral pledged against secured loans	(686,656	)	(1,260,396	)	—	(1,947,052	)
Secured loans	581,896		1,068,104		—	1,650,000
Equity related to repurchase agreement debt	1,236,319		612,319		477,441	2,326,079
Debt-to-equity ratio (7)	10.5		3.2		3.5	6.9
Repurchase agreement debt-to-equity ratio (8)	10.9		2.7		3.5	7.2

(1) Investments in non-Agency CMBS, commercial loans and investments in unconsolidated joint ventures are included in commercial credit.

(2) Investments in non-Agency RMBS, GSE CRT and a loan participation interest are included in residential credit.

(3) Cash and cash equivalents are allocated based on a percentage of equity for each asset class.

(4) Derivative assets and liabilities are allocated based on the hedging strategy for each asset class.

(5) Secured loans are allocated based on amount of collateral pledged.

(6) Net equity in unsecured assets includes commercial loans, investments in unconsolidated joint ventures and other.

(7) Debt-to-equity ratio is calculated as the ratio of total debt (sum of repurchase agreements and secured loans) to total equity.

(8) Repurchase agreement debt-to-equity ratio is calculated as the ratio of repurchase agreements to equity related to repurchase agreement debt.

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December 31, 2018

$ in thousands	Agency RMBS and Agency CMBS		Commercial Credit (1)		Residential Credit (2)	Total
Mortgage-backed and credit risk transfer securities	12,127,173		3,286,459		1,983,010	17,396,642
Cash and cash equivalents (3)	68,689		45,632		21,296	135,617
Derivative assets, at fair value (4)	15,089		—		—	15,089
Other assets	88,517		115,908		61,732	266,157
Total assets	12,299,468		3,447,999		2,066,038	17,813,505
Repurchase agreements	10,339,802		1,616,473		1,646,209	13,602,484
Secured loans (5)	600,856		1,049,144		—	1,650,000
Exchangeable senior notes	—		—		—	—
Derivative liabilities, at fair value (4)	23,219		171		—	23,390
Other liabilities	212,057		25,819		13,058	250,934
Total liabilities	11,175,934		2,691,607		1,659,267	15,526,808
Total equity (allocated)	1,123,534		756,392		406,771	2,286,697
Adjustments to calculate repurchase agreement debt-to-equity ratio:
Net equity in unsecured assets (6)	—		(55,594	)	—	(55,594	)
Collateral pledged against secured loans	(702,952	)	(1,227,412	)	—	(1,930,364	)
Secured loans	600,856		1,049,144		—	1,650,000
Equity related to repurchase agreement debt	1,021,438		522,530		406,771	1,950,739
Debt-to-equity ratio (7)	9.7		3.5		4.0	6.7
Repurchase agreement debt-to-equity ratio (8)	10.1		3.1		4.0	7.0

(1) Investments in non-Agency CMBS, commercial loans and investments in unconsolidated joint ventures are included in commercial credit.

(2) Investments in non-Agency RMBS and GSE CRT are included in residential credit.

(3) Cash and cash equivalents are allocated based on a percentage of equity for each asset class.

(4) Derivative assets and liabilities are allocated based on the hedging strategy for each asset class.

(5) Secured loans are allocated based on amount of collateral pledged.

(6) Net equity in unsecured assets includes commercial loans, investments in unconsolidated joint ventures and other.

(7) Debt-to-equity ratio is calculated as the ratio of total debt (sum of repurchase agreements and secured loans) to total equity.

(8) Repurchase agreement debt-to-equity ratio is calculated as the ratio of repurchase agreements to equity related to repurchase agreement debt.

Liquidity and Capital Resources

Liquidity is a measurement of our ability to meet potential cash requirements, including ongoing commitments to pay dividends, fund investments, repayment of borrowings and other general business needs. Our primary sources of funds for liquidity consist of the net proceeds from our common and preferred equity offerings, net cash provided by operating activities, proceeds from repurchase agreements and other financing arrangements and future issuances of equity and/or debt securities.

We currently believe that we have sufficient liquidity and capital resources available for the acquisition of additional investments, repayments on borrowings, margin requirements and the payment of cash dividends as required for continued qualification as a REIT. We generally maintain liquidity to pay down borrowings under repurchase arrangements to reduce borrowing costs and otherwise efficiently manage our long-term investment capital. Because the level of these borrowings can be adjusted on a daily basis, the level of cash and cash equivalents carried on our condensed consolidated balance sheets is significantly less important than our potential liquidity available under borrowing arrangements. However, there can be no assurance that we will maintain sufficient levels of liquidity to meet any margin calls.

We held cash, cash equivalents and restricted cash of $83.5 million at March 31, 2019 (March 31, 2018: $119.5 million). Our cash, cash equivalents and restricted cash increased due to normal fluctuations in cash balances related to the timing of

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principal and interest payments, repayments of debt, and asset purchases and sales. Our operating activities provided net cash of $68.4 million for the three months ended March 31, 2019 (March 31, 2018: $76.8 million).

Our investing activities used net cash of $3.5 billion in the three months ended March 31, 2019 compared to net cash provided by investing activities of $325.5 million in the three months ended March 31, 2018. We invested $4.3 billion in mortgage-backed and credit risk transfer securities during the three months ended March 31, 2019 compared to investments of $298.9 million in mortgage-backed and credit risk transfer securities in the three months ended March 31, 2018. We generated $300.2 million from principal payments of mortgage-backed and credit risk transfer securities during the three months ended March 31, 2019 (March 31, 2018: $488.1 million) and $734.8 million from sales of mortgage-backed and credit risk transfer securities. We used cash of $232.4 million to settle derivative contracts in the three months ended March 31, 2019 compared to cash provided of $113.6 million in the three months ended March 31, 2018. We also generated $7.1 million in proceeds from commercial loan repayments in the three months ended March 31, 2019 (March 31, 2018: $10.0 million).

Our financing activities provided net cash of $3.4 billion for the three months ended March 31, 2019 compared to net cash used by financing activities of $371.8 million in the three months ended March 31, 2018. Proceeds from issuance of common stock provided $259.0 million for the three months ended March 31, 2019. Repurchase agreement borrowings provided net proceeds of $3.2 billion (March 31, 2018: net use of $169.7 million). We used cash of $143.4 million to retire our exchangeable senior notes in the three months ended March 31, 2018. We also used cash of $58.0 million for the three months ended March 31, 2019 (March 31, 2018: $58.6 million) to pay dividends.

As of March 31, 2019, our wholly-owned subsidiary, IAS Services, had $1.65 billion in outstanding secured loans from the FHLBI. As of March 31, 2019, the FHLBI secured loans were collateralized by non-Agency CMBS and Agency RMBS with a fair value of $1.3 billion and $686.7 million, respectively.

As of March 31, 2019, the average margin requirement (weighted by borrowing amount), or the percentage amount by which the collateral value must exceed the loan amount (also refer to as the "haircut") under our repurchase agreements was 5.0% for Agency RMBS, 5.2% for Agency CMBS, 18.1% for non-Agency RMBS, 18.3% for GSE CRT and 19.0% for non-Agency CMBS. Across our repurchase agreement facilities, the haircuts range from a low of 3.0% to a high of 20.0% for Agency RMBS, a low of 5% to a high of 10% for Agency CMBS, a low of 8.0% to a high of 35.0% for non-Agency RMBS, a low of 15% to a high of 25% for GSE CRT, a low of 10.0% to a high of 30.0% for non-Agency CMBS. Declines in the value of our securities portfolio can trigger margin calls by our lenders under our repurchase agreements. An event of default or termination event would give some of our counterparties the option to terminate all repurchase transactions existing with us and require any amount due by us to the counterparties to be payable immediately.

Effects of Margin Requirements, Leverage and Credit Spreads

Our securities have values that fluctuate according to market conditions and, as discussed above, the market value of our securities will decrease as prevailing interest rates or credit spreads increase. When the value of the securities pledged to secure a repurchase loan or a secured loan decreases to the point where the positive difference between the collateral value and the loan amount is less than the haircut, our lenders may issue a margin call, which means that the lender will require us to pay the margin call in cash or pledge additional collateral to meet that margin call. Under our repurchase facilities and secured loans, our lenders have full discretion to determine the value of the securities we pledge to them. Most of our lenders will value securities based on recent trades in the market. Lenders also issue margin calls as the published current principal balance factors change on the pool of mortgages underlying the securities pledged as collateral when scheduled and unscheduled paydowns are announced monthly.

We experience margin calls and increased collateral requirements in the ordinary course of our business. In seeking to effectively manage the margin requirements established by our lenders, we maintain a position of cash and unpledged securities. We refer to this position as our liquidity. The level of liquidity we have available to meet margin calls is directly affected by our leverage levels, our haircuts and the price changes on our securities. If interest rates increase as a result of a yield curve shift or for another reason or if credit spreads widen, then the prices of our collateral (and our unpledged assets that constitute our liquidity) will decline, we will experience margin calls, and we will use our liquidity to meet the margin calls. There can be no assurance that we will maintain sufficient levels of liquidity to meet any margin calls or increased collateral requirements. If our haircuts increase, our liquidity will proportionately decrease. In addition, if we increase our borrowings, our liquidity will decrease by the amount of additional haircut on the increased level of indebtedness.

We intend to maintain a level of liquidity in relation to our assets that enables us to meet reasonably anticipated margin calls and increased collateral requirements but that also allows us to be substantially invested in securities. We may misjudge the appropriate amount of our liquidity by maintaining excessive liquidity, which would lower our investment returns, or by maintaining insufficient liquidity, which would force us to liquidate assets into unfavorable market conditions and harm our results of operations and financial condition.

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We are subject to financial covenants in connection with our lending, derivatives and other agreements we enter into in the normal course of our business. We intend to continue to operate in a manner which complies with all of our financial covenants. Our lending and derivative agreements provide that we may be declared in default of our obligations if our leverage ratio exceeds certain thresholds and we fail to maintain stockholders’ equity or market value above certain thresholds over specified time periods.

Forward-Looking Statements Regarding Liquidity

Based upon our current portfolio, leverage rate and available borrowing arrangements, we believe that cash flow from operations and available borrowing capacity will be sufficient to enable us to meet anticipated short-term (one year or less) liquidity requirements to fund our investment activities, pay fees under our management agreement, fund our distributions to stockholders and for other general corporate expenses.

Our ability to meet our long-term (greater than one year) liquidity and capital resource requirements will be subject to obtaining additional debt financing. We may increase our capital resources by obtaining long-term credit facilities or through public or private offerings of equity or debt securities, possibly including classes of preferred stock, common stock, and senior or subordinated notes. Such financing will depend on market conditions for capital raises and our ability to invest such offering proceeds. If we are unable to renew, replace or expand our sources of financing on substantially similar terms, it may have an adverse effect on our business and results of operations.

Contractual Obligations

We have entered into an agreement with our Manager pursuant to which our Manager is entitled to receive a management fee and the reimbursement of certain expenses. The management fee is calculated and payable quarterly in arrears in an amount equal to 1.50% of our stockholders’ equity, per annum. Refer to Note 11 - "Related Party Transactions" of our condensed consolidated financial statements for a description of adjustments made to our stockholders' equity for purposes of calculating our management fee. Our Manager uses the proceeds from its management fee in part to pay compensation to its officers and personnel who, notwithstanding that certain of those individuals are also our officers, receive no cash compensation directly from us. We are required to reimburse our Manager for operating expenses related to us incurred by our Manager, including certain salary expenses and other expenses relating to legal, accounting, due diligence and other services. Our reimbursement obligation is not subject to any dollar limitation. Refer to Note 11 – "Related Party Transactions" of our condensed consolidated financial statements for details of our reimbursements to our Manager.

As of March 31, 2019, we had the following contractual obligations:

	Payments Due by Period
$ in thousands	Total	Less than 1 year	1-3 years	3-5 years	After 5 years
Repurchase agreements	16,824,387	16,784,017	40,370	—	—
Secured loans	1,650,000	—	400,000	—	1,250,000
Total (1)	18,474,387	16,784,017	440,370	—	1,250,000

(1) Excluded from total contractual obligations are the amounts due to our Manager under the management agreement, as those obligations do not have fixed and determinable payments.

As of March 31, 2019, we have approximately $121.9 million and $234.8 million in contractual interest payments related to our repurchase agreements and secured loans, respectively.

Off-Balance Sheet Arrangements

We have committed to invest up to $122.5 million in unconsolidated ventures that are sponsored by an affiliate of our Manager. As of March 31, 2019, $114.9 million of our commitment to these unconsolidated ventures has been called. We are committed to fund $7.6 million in additional capital to fund future investments and cover future expenses should they occur.

As of March 31, 2019, we have an unfunded commitment on a loan participation interest of $21.2 million.

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Share-Based Compensation

We established the 2009 Equity Incentive Plan for grants of common stock and other equity based awards to our independent directors and officers and employees of our Manager and its affiliates (the "Incentive Plan"). Under the Incentive Plan, a total of 1,000,000 shares of common stock are authorized for issuance. As of March 31, 2019, 748,492 shares of common stock remain available for future issuance under the Incentive Plan. The Incentive Plan was initially scheduled to terminate on June 30, 2019 but was amended and restated as of May 3, 2019 extending the term an additional ten years.

We recognized compensation expense of approximately $113,000 (March 31, 2018: $93,000) for shares issued to our independent directors under the Incentive Plan for the three months ended March 31, 2019. During the three months ended March 31, 2019 and 2018, we issued 7,065 shares and 7,177 shares of common stock, respectively, to our independent directors. The fair market value of the shares granted was determined by the closing stock market price on the date of the grant. The grants vested immediately.

We recognized compensation expense of approximately $19,000 (March 31, 2018: $14,000) for the three months ended March 31, 2019 for restricted stock units awarded to employees of our Manager and its affiliates under the Incentive Plan. Our Manager reimburses us for the cost of these restricted stock awards under the terms of our management agreement. At March 31, 2019 there was approximately $185,000 of total unrecognized compensation cost related to restricted stock unit awards that is expected to be recognized over a period of up to 48 months, with a weighted-average remaining vesting period of 24 months.

The following table summarizes the activity related to restricted stock units awarded to employees of our Manager and its affiliates for the three months ended March 31, 2019.

	Three Months Ended March 31,
	2019
	Restricted Stock Units		Weighted Average Grant Date Fair Value (1)
Unvested at the beginning of the period	11,051		$	14.55
Shares granted during the period	6,189		15.92
Shares vested during the period	(4,720	)	14.48
Unvested at the end of the period	12,520		$	15.25

(1) The grant date fair value of restricted stock awards is based on the closing market price of our common stock at the grant date.

Dividends

We intend to continue regular quarterly distributions to holders of our common stock and preferred stock. U.S. federal income tax law generally requires that a REIT distribute at least 90% of its REIT taxable income annually, determined without regard to the deduction for dividends paid and excluding net capital gains, and that it pay tax at regular corporate rates to the extent that it annually distributes less than 100% of its taxable income. Before we pay any dividend, whether for U.S. federal income tax purposes or otherwise, we must first meet both our operating requirements and debt service on our repurchase agreements and other debt payable. If our cash available for distribution is less than our taxable income, we could be required to sell assets or borrow funds to make cash distributions, or we may make a portion of the required distribution in the form of a taxable stock distribution or distribution of debt securities.

Inflation

Virtually all of our assets and liabilities are sensitive to interest rates. As a result, interest rates and other factors influence our performance far more than inflation. Changes in interest rates do not necessarily correlate with inflation rates or changes in inflation rates.

Unrelated Business Taxable Income

We have not engaged in transactions that would result in a portion of our income being treated as unrelated business taxable income.

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Exposure to Financial Counterparties

We finance a substantial portion of our investment portfolio through repurchase agreements. Under these agreements, we pledge assets from our investment portfolio as collateral. Additionally, certain counterparties may require us to provide cash collateral in the event the market value of the assets declines to maintain a contractual repurchase agreement collateral ratio. If a counterparty were to default on its obligations, we would be exposed to potential losses to the extent the fair value of collateral pledged by us to the counterparty including any accrued interest receivable on such collateral exceeded the amount loaned to us by the counterparty plus interest due to the counterparty.

We also use bilateral interest rate swaps to manage our interest rate risk. Under these agreements, we pledge assets from our investment portfolio and cash as collateral. If a counterparty were to default on its obligations, we would be exposed to potential losses to the extent the amount of securities or cash pledged exceeded the unrealized loss for the associated derivative, including the impact of any accrued interest due to or from the counterparty. Additionally if a derivative was in an unrealized gain position, we would be exposed to potential losses to the extent that the unrealized gain for the associated derivative exceeded the amount of collateral received, including the impact of any accrued interest due to or from the counterparty.

The following table summarizes our exposure to counterparties by geographic concentration as of March 31, 2019:

$ in thousands	Number of Counterparties	Repurchase Agreement Financing	Interest Rate Swaps at Fair Value		Exposure
North America	17	6,740,444	(2,620	)	776,950
Europe (excluding United Kingdom)	6	2,983,373	—		417,647
Asia	5	3,818,497	—		267,638
United Kingdom	4	3,282,073	(2,520	)	185,980
Total	32	16,824,387	(5,140	)	1,648,215

Other Matters

We believe that we satisfied each of the asset tests in Section 856(c)(4) of the Internal Revenue Code of 1986, as amended (the "Code") for the period ended March 31, 2019, and that our proposed method of operation will permit us to satisfy the asset tests, gross income tests, and distribution and stock ownership requirements for our taxable year that will end on December 31, 2019.

At all times, we intend to conduct our business so that neither we nor our Operating Partnership nor the subsidiaries of our Operating Partnership are required to register as an investment company under the 1940 Act. If we were required to register as an investment company, then our use of leverage would be substantially reduced. Because we are a holding company that conducts our business through our Operating Partnership and the Operating Partnership’s wholly-owned or majority-owned subsidiaries, the securities issued by these subsidiaries that are excepted from the definition of "investment company" under Section 3(c)(1) or Section 3(c)(7) of the 1940 Act, together with any other investment securities the Operating Partnership may own, may not have a combined value in excess of 40% of the value of the Operating Partnership’s total assets (exclusive of U.S. government securities and cash items) on an unconsolidated basis, which we refer to as the 40% test. This requirement limits the types of businesses in which we are permitted to engage in through our subsidiaries. In addition, we believe neither we nor the Operating Partnership are considered an investment company under Section 3(a)(1)(A) of the 1940 Act because they do not engage primarily or hold themselves out as being engaged primarily in the business of investing, reinvesting or trading in securities. Rather, through the Operating Partnership’s wholly-owned or majority-owned subsidiaries, we and the Operating Partnership are primarily engaged in the non-investment company businesses of these subsidiaries. IAS Asset I LLC and certain of the Operating Partnership’s other subsidiaries that we may form in the future rely upon the exclusion from the definition of "investment company" under the 1940 Act provided by Section 3(c)(5)(C) of the 1940 Act, which is available for entities "primarily engaged in the business of purchasing or otherwise acquiring mortgages and other liens on and interests in real estate." This exclusion generally requires that at least 55% of each subsidiary’s portfolio be comprised of qualifying assets and at least 80% be comprised of qualifying assets and real estate-related assets (and no more than 20% comprised of miscellaneous assets). We calculate that as of March 31, 2019, we conducted our business so as not to be regulated as an investment company under the 1940 Act.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

The primary components of our market risk are related to interest rate, principal prepayment and market value. While we do not seek to avoid risk completely, we believe the risk can be quantified from historical experience and we seek to actively manage that risk, to earn sufficient compensation to justify taking those risks and to maintain capital levels consistent with the risks we undertake.

Interest Rate Risk

Interest rate risk is highly sensitive to many factors, including governmental, monetary and tax policies, domestic and international economic and political considerations, and other factors beyond our control. We are subject to interest rate risk in connection with our investments and our repurchase agreements. Our repurchase agreements are typically of limited duration and will be periodically refinanced at current market rates. We mitigate this risk through utilization of derivative contracts, primarily interest rate swap agreements, TBAs and futures contracts.

Interest Rate Effect on Net Interest Income

Our operating results depend in large part upon differences between the yields earned on our investments and our cost of borrowing and interest rate hedging activities. Most of our repurchase agreements provide financing based on a floating rate of interest calculated on a fixed spread over LIBOR. The fixed spread will vary depending on the type of underlying asset which collateralizes the financing. Accordingly, the portion of our portfolio which consists of floating interest rate assets are match-funded utilizing our expected sources of short-term financing, while our fixed interest rate assets are not match-funded. During periods of rising interest rates, the borrowing costs associated with our investments tend to increase while the income earned on our fixed interest rate investments may remain substantially unchanged. This increase in borrowing costs results in the narrowing of the net interest spread between the related assets and borrowings and may even result in losses. Further, during this portion of the interest rate and credit cycles, defaults could increase and result in credit losses to us, which could adversely affect our liquidity and operating results. Such delinquencies or defaults could also have an adverse effect on the spread between interest-earning assets and interest-bearing liabilities.

Hedging techniques are partly based on assumed levels of prepayments of our RMBS. If prepayments are slower or faster than assumed, the life of the RMBS will be longer or shorter, which would reduce the effectiveness of any hedging strategies we may use and may cause losses on such transactions. Hedging strategies involving the use of derivative securities are highly complex and may produce volatile returns.

Interest Rate Effects on Fair Value

Another component of interest rate risk is the effect that changes in interest rates will have on the market value of the assets that we acquire. We face the risk that the market value of our assets will increase or decrease at different rates than those of our liabilities, including our hedging instruments.

We primarily assess our interest rate risk by estimating the duration of our assets and the duration of our liabilities. Duration measures the market price volatility of financial instruments as interest rates change. We generally calculate duration using various financial models and empirical data. Different models and methodologies can produce different duration numbers for the same securities.

The impact of changing interest rates on fair value can change significantly when interest rates change materially. Therefore, the volatility in the fair value of our assets could increase significantly in the event interest rates change materially. In addition, other factors impact the fair value of our interest rate-sensitive investments and hedging instruments, such as the shape of the yield curve, market expectations as to future interest rate changes and other market conditions. Accordingly, changes in actual interest rates may have a material adverse effect on us.

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Spread Risk

We employ a variety of spread risk management techniques that seek to mitigate the influences of spread changes on our book value and our liquidity to help us achieve our investment objectives. We refer to the difference between interest rates on our investments and interest rates on risk free instruments as spreads. The yield on our investments changes over time due to the level of risk free interest rates, the creditworthiness of the security, and the price of the perceived risk. The change in the market yield of our interest rate hedges also changes primarily with the level of risk free interest rates. We manage spread risk through careful asset selection, sector allocation, regulating our portfolio value-at-risk, and maintaining adequate liquidity. Changes in spreads impact our book value and our liquidity and could cause us to sell assets and to change our investment strategy in order to maintain liquidity and preserve book value.

Prepayment Risk

As we receive prepayments of principal on our investments, premiums paid on these investments are amortized against interest income. In general, an increase in prepayment rates will accelerate the amortization of purchase premiums, thereby reducing the interest income earned on the investments. Conversely, discounts on such investments are accreted into interest income. In general, an increase in prepayment rates will accelerate the accretion of purchase discounts, thereby increasing the interest income earned on the investments.

Extension Risk

We compute the projected weighted average life of our investments based upon assumptions regarding the rate at which the borrowers will prepay the underlying mortgages. In general, when a fixed-rate or hybrid adjustable-rate security is acquired with borrowings, we may, but are not required to, enter into an interest rate swap agreement or other hedging instrument that effectively fixes our borrowing costs for a period close to the anticipated average life of the fixed-rate portion of the related assets. This strategy is designed to protect us from rising interest rates, because the borrowing costs are fixed for the duration of the fixed-rate portion of the related target asset.

However, if prepayment rates decrease in a rising interest rate environment, then the life of the fixed-rate portion of the related assets could extend beyond the term of the swap agreement or other hedging instrument. This could have a negative impact on our results from operations, as borrowing costs would no longer be fixed after the end of the hedging instrument, while the income earned on the hybrid adjustable-rate assets would remain fixed. This situation may also cause the market value of our hybrid adjustable-rate assets to decline, with little or no offsetting gain from the related hedging transactions. In extreme situations, we may be forced to sell assets to maintain adequate liquidity, which could cause us to incur losses.

Market Risk

Market Value Risk

Our available-for-sale securities are reflected at their estimated fair value with unrealized gains and losses excluded from earnings and reported in other comprehensive income pursuant to ASC Topic 320. The estimated fair value of these securities fluctuates primarily due to changes in interest rates and other factors. Generally, in a rising interest rate environment, the estimated fair value of these securities would be expected to decrease; conversely, in a decreasing interest rate environment, the estimated fair value of these securities would be expected to increase.

The sensitivity analysis table presented below shows the estimated impact of an instantaneous parallel shift in the yield curve, up and down 50 and 100 basis points, on the market value of our interest rate-sensitive investments and net interest income, including net interest paid or received under interest rate swaps, at March 31, 2019, assuming a static portfolio. When evaluating the impact of changes in interest rates, prepayment assumptions and principal reinvestment rates are adjusted based on our Manager’s expectations. The analysis presented utilized assumptions, models and estimates of our Manager based on our Manager’s judgment and experience.

Change in Interest Rates	Percentage Change in Projected Net Interest Income		Percentage Change in Projected Portfolio Value
+1.00%	(9.13	)%	(1.08	)%
+0.50%	(1.90	)%	(0.37	)%
-0.50%	(0.52	)%	(0.16	)%
-1.00%	(7.07	)%	(0.94	)%

Certain assumptions have been made in connection with the calculation of the information set forth in the foregoing interest rate sensitivity table and, as such, there can be no assurance that assumed events will occur or that other events will not

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occur that would affect the outcomes. The base interest rate scenario assumes interest rates at March 31, 2019. Furthermore, while we generally expect to retain such assets and the associated interest rate risk to maturity, future purchases and sales of assets could materially change our interest rate risk profile.

Given the low interest rates at March 31, 2019, we applied a floor of 0% for all anticipated interest rates included in our assumptions. Because of this floor, we anticipate that any hypothetical interest rate shock decrease would have a limited positive impact on our funding costs; however, because prepayment speeds are unaffected by this floor, we expect that any increase in our prepayment speeds (occurring as a result of any interest rate decrease or otherwise) could result in an acceleration of our premium amortization on securities purchased at a premium, and accretion of discount on our securities purchased at a discount. As a result, because this floor limits the positive impact of any interest rate decrease on our funding costs, hypothetical interest rate decreases could cause the fair value of our financial instruments and our net interest income to decline.

The information set forth in the interest rate sensitivity table above and all related disclosures constitutes forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. Actual results could differ significantly from those estimated in the foregoing interest rate sensitivity table.

Real Estate Risk

Residential and commercial property values are subject to volatility and may be adversely affected by a number of factors, including, but not limited to: national, regional and local economic conditions (which may be adversely affected by industry slowdowns and other factors); local real estate conditions (such as the supply of housing stock); changes or continued weakness in specific industry segments; construction quality, age and design; demographic factors; and retroactive changes to building or similar codes. In addition, decreases in property values reduce the value of the collateral and the potential proceeds available to a borrower to repay our loans, which could also cause us to suffer losses.

Credit Risk

We believe that our investment strategy will generally keep our credit losses and financing costs low. However, we retain the risk of potential credit losses on all of our residential and commercial mortgage investments. We seek to manage this risk through our pre-acquisition due diligence process. In addition, we re-evaluate the credit risk inherent in our investments on a regular basis pursuant to fundamental considerations such as GDP, unemployment, interest rates, retail sales, store closings/openings, corporate earnings, housing inventory, affordability and regional home price trends. We also review key loan credit metrics including, but not limited to, payment status, current loan-to-value ratios, current borrower credit scores and debt yields. These characteristics assist in determining the likelihood and severity of loan loss as well as prepayment and extension expectations. We then perform structural analysis under multiple scenarios to establish likely cash flow profiles and credit enhancement levels relative to collateral performance projections. This analysis allows us to quantify our opinions of credit quality and fundamental value, which are key drivers of portfolio management decisions.

Foreign Exchange Rate Risk

We have an investment in a commercial loan denominated in foreign currency and an investment in an unconsolidated joint venture whose net assets and results of operations are exposed to foreign currency translation risk when translated in U.S. dollars upon consolidation. We seek to hedge our foreign currency exposures by purchasing currency forward contracts.

Risk Management

To the extent consistent with maintaining our REIT qualification, we seek to manage risk exposure to protect our investment portfolio against the effects of major interest rate changes. We generally seek to manage this risk by:

• monitoring and adjusting, if necessary, the reset index and interest rate related to our target assets and our financings;

• attempting to structure our financing agreements to have a range of different maturities, terms, amortizations and interest rate adjustment periods;

• using hedging instruments, primarily interest rate swap agreements but also financial futures, options, interest rate cap agreements, floors and forward sales to adjust the interest rate sensitivity of our target assets and our borrowings; and

• actively managing, on an aggregate basis, the interest rate indices, interest rate adjustment periods, and gross reset margins of our target assets and the interest rate indices and adjustment periods of our financings.

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ITEM 4. CONTROLS AND PROCEDURES.

Our management is responsible for establishing and maintaining disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act.

We have evaluated, with the participation of our principal executive officer and principal financial officer, the effectiveness of our disclosure controls and procedures as of March 31, 2019. Based upon our evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives.

Changes in Internal Control over Financial Reporting

There has been no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) during the quarter ended March 31, 2019 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II – OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS.

From time to time, we may be involved in various claims and legal actions arising in the ordinary course of business. As of March 31, 2019, we were not involved in any such legal proceedings.

ITEM 1A. RISK FACTORS.

There were no material changes during the period covered by this Report to the risk factors previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2018, as filed with the SEC on February 20, 2019. Additional risks not presently known, or that we currently deem immaterial, also may have a material adverse effect on our business, financial condition and results of operations.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS.

During the three months ended March 31, 2019, we did not repurchase any shares of our common stock.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES.

None.

ITEM 4. MINE SAFETY DISCLOSURES.

Not applicable.

ITEM 5. OTHER INFORMATION.

None.

ITEM 6. EXHIBITS.

A list of exhibits to this Form 10-Q is set forth on the Exhibit Index and is incorporated herein by reference.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	INVESCO MORTGAGE CAPITAL INC.
May 8, 2019	By:	/s/ John M. Anzalone
		John M. Anzalone
		Chief Executive Officer
May 8, 2019	By:	/s/ R. Lee Phegley, Jr.
		R. Lee Phegley, Jr.
		Chief Financial Officer

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EXHIBIT INDEX

Item 6.        Exhibits

Exhibit No.	Description
3.1	Articles of Amendment and Restatement of Invesco Mortgage Capital Inc. (incorporated by reference to Exhibit 3.1 to our Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission ("SEC") on August 12, 2009).
3.2	Articles Supplementary of 7.75% Series A Cumulative Redeemable Preferred Stock (incorporated by reference to Exhibit 3.3 to the Registrant’s Registration Statement on Form 8-A, filed with the SEC on July 23, 2012).
3.3	Articles Supplementary classifying 1,500,000 shares of the Company’s preferred stock as additional Series A Shares (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed with the SEC on March 19, 2019).
3.4	Articles Supplementary of 7.75% Fixed-to-Floating Series B Cumulative Redeemable Preferred Stock (incorporated by reference to Exhibit 3.3 to the Registrant’s Registration Statement on Form 8-A, filed with the SEC on September 8, 2014).
3.5	Articles Supplementary classifying 1,500,000 shares of the Company’s preferred stock as additional Series B Shares (incorporated by reference to Exhibit 3.2 to the Current Report on Form 8-K, filed with the SEC on March 19, 2019).
3.6	Articles Supplementary of 7.50% Fixed-to-Floating Series C Cumulative Redeemable Preferred Stock (incorporated by reference to Exhibit 3.4 to the Registrant’s Registration Statement on Form 8-A, filed with the SEC on August 11, 2017).
3.7	Articles Supplementary classifying 4,000,000 shares of the Company’s preferred stock as additional Series C Shares (incorporated by reference to Exhibit 3.3 to the Current Report on Form 8-K, filed with the SEC on March 19, 2019).
3.8	Amended and Restated Bylaws of Invesco Mortgage Capital Inc., incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed with the SEC on February 17, 2017.
10.1	Fourth Amendment to First Amended and Restated Agreement of Limited Partnership of IAS Operating Partnership LP, dated November 30, 2018
10.2	Amendment No. 1 to the Equity Distribution Agreement between the Company, the Operating Partnership, the Manager and the Placement Agent (incorporated by reference to Exhibit 1.1 to the Current Report on Form 8-K, filed with the SEC on March 19, 2019).
10.3	Equity Distribution Agreement with respect to the Series A Shares, Series B Shares and Series C Shares, dated March  19, 2019, by and among the Company, the Operating Partnership, the Manager and JonesTrading Institutional Services LLC (incorporated by reference to Exhibit 1.1 to the Current Report on Form 8-K, filed with the SEC on March 19, 2019).
10.4	Invesco Mortgage Capital Inc. 2009 Equity Incentive Plan as Amended and Restated (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K, filed with the SEC on May 7, 2019).
31.1	Certification of John M. Anzalone pursuant to Rule 13a-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of R. Lee Phegley, Jr. pursuant to Rule 13a-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of John M. Anzalone pursuant to Rule 13a-14(b) and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of R. Lee Phegley, Jr. pursuant to Rule 13a-14(b) and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

71

101 The following series of unaudited XBRL-formatted documents are collectively included herewith as Exhibit 101. The financial information is extracted from Invesco Mortgage Capital Inc.’s unaudited condensed consolidated interim financial statements and notes that are included in this Form 10-Q Report. 101.INS XBRL Instance Document 101.SCH XBRL Taxonomy Extension Schema Document 101.CAL XBRL Taxonomy Calculation Linkbase Document 101.LAB XBRL Taxonomy Label Linkbase Document 101.PRE XBRL Taxonomy Presentation Linkbase Document 101.DEF XBRL Taxonomy Definition Linkbase Document

72

EX-10.1

EXHIBIT 10.1

FOURTH AMENDMENT TO

FIRST AMENDED AND RESTATED AGREEMENT

OF LIMITED PARTNERSHIP OF

IAS OPERATING PARTNERSHIP LP

The undersigned, as the General Partner of IAS Operating Partnership LP (the “Partnership”), hereby amends the Partnership’s First Amended and Restated Agreement of Limited Partnership, as heretofore amended (the “Partnership Agreement”), pursuant to Sections 4.3.A, 4.3.B and 7.3.0 of the Partnership Agreement, to amend the current Exhibit A to read as provided in the attached Exhibit A. In all other respects, the Partnership Agreement shall continue in full force and effect as amended hereby. Any capitalized terms used in this Amendment and not defined herein have the meanings given to them in the Partnership Agreement.

Dated: November 30, 2018            IAS OPERATING PARTNERSHIP LP

By:    INVESCO MORTGAGE CAPITAL INC.,

general partner

By:/s/ Robert H. Rigsby

Name: Robert H. Rigsby

Title: Vice President and Secretary

EXHIBIT 10.1

Exhibit A

PARTNERS AND PARTNERSHIP INTERESTS

	Op Units		Series A Preferred		Series B Preferred		Series C Preferred
Name and Address of Partner	Capital Contributions(1)	Units	Capital Contributions	Preferred Units	Capital Contributions	Preferred Units	Capital Contributions	Preferred Units
GENERAL PARTNERS:
Invesco Mortgage Capital Inc.	$24,521,488	1,115,850 1.0%	$1,400,000	56,000 1.0%	$1,550,000	62,000 1.0%	$2,875,000	115,000 1.0%
LIMITED PARTNERS
Invesco Mortgage Capital Inc.	$2,425,175,205	110,357,561 98.9%	$138,600,000	5,544,000 99.0%	$153,450,000	6,138,000 99.0%	$284,625,000	11,385,000 99.0%
IVR Limited Partner LLC	$2,452,149	111,585 0.1%	0	0%	0	0%	0	0%

(1) Subject to adjustment as provided in Section 4.1 of the Partnership Agreement.

EX-31.1

EXHIBIT 31.1

Certification Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, John M. Anzalone, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Invesco Mortgage Capital Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

May 8, 2019

/s/ John M. Anzalone

John M. Anzalone

Chief Executive Officer

EX-31.2

EXHIBIT 31.2

Certification Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, R. Lee Phegley, Jr., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Invesco Mortgage Capital Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

May 8, 2019

/s/ R. Lee Phegley, Jr.

R. Lee Phegley, Jr.

Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF JOHN M. ANZALONE

PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with Invesco Mortgage Capital Inc.’s (the “Company”) Quarterly Report on Form 10-Q for the period ended March 31, 2019 (the “Report”), I, John M. Anzalone, do hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1. the Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

May 8, 2019

/s/ John M. Anzalone

John M. Anzalone

Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF R. LEE PHEGLEY, JR.

PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with Invesco Mortgage Capital Inc.’s (the “Company”) Quarterly Report on Form 10-Q for the period ended March 31, 2019 (the “Report”), I, R. Lee Phegley, Jr., do hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1. the Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

May 8, 2019

/s/ R. Lee Phegley, Jr.

R. Lee Phegley, Jr.

Chief Financial Officer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	Invesco Mortgage Capital Inc.
Trading Symbol	IVR
Entity Central Index Key	0001437071
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		128,588,493

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	$ 21,127,598	$ 17,396,642
Cash and cash equivalents	78,482	135,617
Restricted cash	5,025	0
Due from counterparties	13,000	13,500
Investment related receivable	70,789	66,598
Derivative assets, at fair value	26,580	15,089
Other assets	177,913	186,059
Total assets	21,499,387	17,813,505
Liabilities:
Repurchase agreements	16,824,387	13,602,484
Secured loans	1,650,000	1,650,000
Derivative liabilities, at fair value	8,463	23,390
Dividends and distributions payable	60,433	49,578
Investment related payable	222,500	132,096
Accrued interest payable	47,100	37,620
Collateral held payable	2,273	18,083
Accounts payable and accrued expenses	2,384	1,694
Due to affiliate	10,133	11,863
Total liabilities	18,827,673	15,526,808
Commitments and contingencies
Equity:
Common Stock, par value $0.01 per share; 450,000,000 shares authorized; 128,267,497 and 111,584,996 shares issued and outstanding, respectively	1,282	1,115
Additional paid in capital	2,642,050	2,383,532
Accumulated other comprehensive income	277,182	220,813
Retained earnings (distributions in excess of earnings)	(812,124)	(882,087)
Total stockholders’ equity	2,671,714	2,286,697
Total liabilities and stockholders' equity	21,499,387	17,813,505
Series A Preferred Stock
Equity:
Preferred Stock	135,356	135,356
Series B Preferred Stock
Equity:
Preferred Stock	149,860	149,860
Series C Preferred Stock
Equity:
Preferred Stock	$ 278,108	$ 278,108

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Preferred Stock - par value (in usd per share)	$ 0.01	$ 0.01
Preferred Stock - shares authorized	50,000,000	50,000,000
Common Stock - par value (in usd per share)	$ 0.01	$ 0.01
Common Stock - shares authorized	450,000,000	450,000,000
Common Stock - shares issued	128,267,497	111,584,996
Common Stock - shares outstanding	128,267,497	111,584,996
MBS and GSE CRT pledged as collateral	$ 20,544,317	$ 17,082,825
Series A Preferred Stock
Preferred Stock - dividend rate stated percentage	7.75%	7.75%
Preferred Stock - shares issued	5,600,000	5,600,000
Preferred Stock - shares outstanding	5,600,000	5,600,000
Preferred Stock - liquidation preference value	$ 140,000	$ 140,000
Series B Preferred Stock
Preferred Stock - dividend rate stated percentage	7.75%	7.75%
Preferred Stock - shares issued	6,200,000	6,200,000
Preferred Stock - shares outstanding	6,200,000	6,200,000
Preferred Stock - liquidation preference value	$ 155,000	$ 155,000
Series C Preferred Stock
Preferred Stock - dividend rate stated percentage	7.50%	7.50%
Preferred Stock - shares issued	11,500,000	11,500,000
Preferred Stock - shares outstanding	11,500,000	11,500,000
Preferred Stock - liquidation preference value	$ 287,500	$ 287,500

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest Income
Mortgage-backed and credit risk transfer securities	$ 185,492	$ 149,003
Commercial and other loans	1,582	4,222
Total interest income	187,074	153,225
Interest Expense
Repurchase agreements	101,875	59,585
Secured loans	11,144	6,927
Exchangeable senior notes	0	1,621
Total interest expense	113,019	68,133
Net interest income	74,055	85,092
Other Income (loss)
Gain (loss) on investments, net	268,382	(160,370)
Equity in earnings (losses) of unconsolidated ventures	692	896
Gain (loss) on derivative instruments, net	(201,460)	133,367
Realized and unrealized credit derivative income (loss), net	7,884	3,165
Net loss on extinguishment of debt	0	(26)
Other investment income (loss), net	1,029	3,102
Total other income (loss)	76,527	(19,866)
Expenses
Management fee – related party	9,534	10,221
General and administrative	2,258	1,756
Total expenses	11,792	11,977
Net income	138,790	53,249
Net income attributable to non-controlling interest	0	671
Net income attributable to Invesco Mortgage Capital Inc.	138,790	52,578
Dividends to preferred stockholders	11,107	11,107
Net income attributable to common stockholders	$ 127,683	$ 41,471
Earnings per share:
Net income attributable to common shareholders (basic) (usd per share)	$ 1.05	$ 0.37
Net income attributable to common shareholders (diluted) (usd per share)	$ 1.05	$ 0.37

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 138,790	$ 53,249
Other comprehensive income (loss):
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	52,349	(132,317)
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	10,147	9,237
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	(5,851)	(6,539)
Currency translation adjustments on investment in unconsolidated venture	(276)	312
Total other comprehensive income (loss)	56,369	(129,307)
Comprehensive income (loss)	195,159	(76,058)
Less: Comprehensive (income) loss attributable to non-controlling interest	0	959
Less: Dividends to preferred stockholders	(11,107)	(11,107)
Comprehensive income (loss) attributable to common stockholders	$ 184,052	$ (86,206)

XML

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock Series A Preferred Stock	Preferred Stock Series B Preferred Stock	Preferred Stock Series C Preferred Stock	Common Stock	Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Distributions in excess of earnings)	Total Stockholders’ Equity	Non- Controlling Interest
Beginning Balance (in shares) at Dec. 31, 2017		5,600,000	6,200,000	11,500,000	111,624,159
Balance at beginning of period at Dec. 31, 2017	$ 2,656,878	$ 135,356	$ 149,860	$ 278,108	$ 1,116	$ 2,384,356	$ 261,029	$ (579,334)	$ 2,630,491	$ 26,387
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	53,249							52,578	52,578	671
Other comprehensive income	(129,307)						(127,677)		(127,677)	(1,630)
Stock awards (in shares)					12,564
Common stock dividends	(46,887)							(46,887)	(46,887)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(599)									(599)
Preferred stock dividends	(11,107)							(11,107)	(11,107)
Amortization of equity-based compensation	129					127			127	2
Rebalancing of ownership percentage of non-controlling interest						143			143	(143)
Ending Balance (in shares) at Mar. 31, 2018		5,600,000	6,200,000	11,500,000	111,636,723
Balance at end of period at Mar. 31, 2018	2,522,356	$ 135,356	$ 149,860	$ 278,108	$ 1,116	2,384,626	133,352	(584,750)	2,497,668	$ 24,688
Beginning Balance (in shares) at Dec. 31, 2018		5,600,000	6,200,000	11,500,000	111,584,996
Balance at beginning of period at Dec. 31, 2018		$ 135,356	$ 149,860	$ 278,108	$ 1,115	2,383,532	220,813	(882,087)	2,286,697
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	138,790							138,790	138,790
Other comprehensive income	$ 56,369						56,369		56,369
Proceeds from issuance of common stock, net of offering costs (in shares)					16,672,000
Proceeds from issuance of common stock, net of offering costs					$ 167	258,386			258,553
Stock awards (in shares)					10,501
Common stock dividends								(57,720)	(57,720)
Preferred stock dividends								(11,107)	(11,107)
Amortization of equity-based compensation						132			132
Ending Balance (in shares) at Mar. 31, 2019		5,600,000	6,200,000	11,500,000	128,267,497
Balance at end of period at Mar. 31, 2019		$ 135,356	$ 149,860	$ 278,108	$ 1,282	$ 2,642,050	$ 277,182	$ (812,124)	$ 2,671,714

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities
Net income	$ 138,790	$ 53,249
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of mortgage-backed and credit risk transfer securities premiums and (discounts), net	3,185	12,663
Realized and unrealized (gain) loss on derivative instruments, net	205,969	(145,479)
Realized and unrealized (gain) loss on credit derivatives, net	(2,534)	2,468
(Gain) loss on investments, net	(268,382)	160,370
(Gain) loss from investments in unconsolidated ventures in excess of distributions received	(692)	(352)
Other amortization	(5,719)	(6,265)
Net loss on extinguishment of debt	0	26
(Gain) loss on foreign currency transactions, net	0	(1,800)
Changes in operating assets and liabilities:
(Increase) decrease in operating assets	(10,015)	1,334
Increase in operating liabilities	7,758	562
Net cash provided by operating activities	68,360	76,776
Cash Flows from Investing Activities
Purchase of mortgage-backed and credit risk transfer securities	(4,340,536)	(298,859)
(Contributions to) distributions from investments in unconsolidated ventures, net	299	(1,532)
Change in other assets	1,154	0
Principal payments from mortgage-backed and credit risk transfer securities	300,222	488,123
Proceeds from sale of mortgage-backed and credit risk transfer securities	734,834	0
Settlement (termination) of futures, currency forwards and interest rate swaps, net	(232,387)	113,578
Net change in due from counterparties and collateral held payable	(14,060)	14,853
Principal payments from commercial loans held-for-investment	7,128	10,042
Origination and advances of commercial loans, net of origination fees	0	(698)
Net cash (used in) provided by investing activities	(3,543,346)	325,507
Cash Flows from Financing Activities
Proceeds from issuance of common stock	258,966	0
Proceeds from repurchase agreements	28,316,732	35,711,164
Principal repayments of repurchase agreements	(25,094,829)	(35,880,828)
Extinguishment of exchangeable senior notes	0	(143,433)
Payments of deferred costs	(21)	(76)
Payments of dividends and distributions	(57,972)	(58,587)
Net cash provided by (used in) financing activities	3,422,876	(371,760)
Net change in cash, cash equivalents and restricted cash	(52,110)	30,523
Cash, cash equivalents and restricted cash, beginning of period	135,617	89,001
Cash, cash equivalents and restricted cash, end of period	83,507	119,524
Supplement Disclosure of Cash Flow Information
Interest paid	109,392	73,811
Non-cash Investing and Financing Activities Information
Net change in unrealized gain (loss) on mortgage-backed and credit risk transfer securities	62,496	(123,080)
Dividends and distributions declared not paid	60,433	50,199
Net change in investment related payable (receivable)	(95,250)	80,688
Offering costs not paid	$ (413)	$ 0

XML

Organization and Business Operations

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Business Operations

Organization and Business Operations

Invesco Mortgage Capital Inc. (the "Company", "we") is a Maryland corporation primarily focused on investing in, financing and managing residential and commercial mortgage-backed securities and other mortgage-related assets. We are externally managed and advised by Invesco Advisers, Inc. (our "Manager"), a registered investment adviser and an indirect, wholly-owned subsidiary of Invesco Ltd. ("Invesco"), a leading independent global investment management firm. We conduct our business through IAS Operating Partnership LP (the "Operating Partnership") and have one operating segment. Prior to November 30, 2018, a wholly-owned subsidiary of Invesco owned 1.3% of the Operating Partnership. See Note 15 - "Non-Controlling Interest - Operating Partnership" of our Annual Report on Form 10-K for the year ended December 31, 2018 for information regarding redemption of Operating Partnership Units ("OP Units") previously held by Invesco.

We primarily invest in:

• Residential mortgage-backed securities ("RMBS") that are guaranteed by a U.S. government agency such as the Government National Mortgage Association ("Ginnie Mae"), or a federally chartered corporation such as the Federal National Mortgage Association ("Fannie Mae") or the Federal Home Loan Mortgage Corporation ("Freddie Mac") (collectively "Agency RMBS");

• Commercial mortgage-backed securities (“CMBS”) that are guaranteed by a U.S. government agency such as Ginnie Mae or a federally chartered corporation such as Fannie Mae or Freddie Mac (collectively "Agency CMBS");

• RMBS that are not guaranteed by a U.S. government agency or a federally chartered corporation ("non-Agency RMBS");

• CMBS that are not guaranteed by a U.S. government agency or a federally chartered corporation (“non-Agency CMBS”);

• Credit risk transfer securities that are unsecured obligations issued by government-sponsored enterprises ("GSE CRT");

• Residential and commercial mortgage loans; and

• Other real estate-related financing agreements.

We elected to be taxed as a real estate investment trust ("REIT") for U.S. federal income tax purposes under the provisions of the Internal Revenue Code of 1986 commencing with our taxable year ended December 31, 2009. To maintain our REIT qualification, we are generally required to distribute at least 90% of our REIT taxable income to our stockholders annually. We operate our business in a manner that permits exclusion from the "Investment Company" definition under the Investment Company Act of 1940.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Basis of Presentation and Consolidation

Certain disclosures included in our Annual Report on Form 10-K are not required to be included on an interim basis in our quarterly reports on Form 10-Q. We have condensed or omitted these disclosures. Therefore, this Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2018.

Our condensed consolidated financial statements have been prepared in accordance with U.S. GAAP and consolidate the financial statements of the Company and our controlled subsidiaries. All significant intercompany transactions, balances, revenues and expenses are eliminated upon consolidation. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, consisting of normal recurring accruals, which are necessary for a fair statement of our financial condition and results of operations for the periods presented.

Reclassifications

Our condensed consolidated balance sheet for the year ended December 31, 2018 presented in this Form 10-Q includes a reclassification of Commercial Loans, held-for-investment to Other assets to conform to our current period presentation. See Note 5 - "Other Assets" for further information. 

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Examples of estimates include, but are not limited to, estimates of the fair values of financial instruments, interest income on mortgage-backed and credit risk transfer securities, provision for loan losses and other-than-temporary impairment charges. Actual results may differ from those estimates.

Significant Accounting Policies

There have been no changes to our accounting policies included in Note 2 to the consolidated financial statements of our Annual Report on Form 10-K for the year ended December 31, 2018 except for the implementation of new accounting guidance for stock-based payments to non-employees discussed below.

Accounting Pronouncements Recently Adopted

Effective January 1, 2019, we adopted the accounting guidance that aligns the measurement and classification for stock-based payments to non-employees with the guidance for stock-based payments to employees. Under the new guidance, the measurement of equity-classified non-employee awards is fixed at the grant date. The implementation of the guidance did not have a material impact on our financial statements.

Pending Accounting Pronouncements

In June 2016, new accounting guidance was issued for reporting credit losses for assets measured at amortized cost and available-for-sale securities. The new guidance significantly changes how entities will measure credit losses for most financial assets, including loans, that are not measured at fair value through net income. The guidance replaces the existing “incurred loss” model with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. The new guidance also simplifies the accounting model for purchased credit-impaired debt securities and loans. We are required to adopt the new guidance in the first quarter of 2020 by recording a cumulative effect adjustment to retained earnings as of January 1, 2020. We are currently evaluating the potential impacts of the new guidance and proposed amendments to the new guidance on our consolidated financial statements.

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Variable Interest Entities ("VIEs")

3 Months Ended

Mar. 31, 2019

Variable Interest Entity Disclosure [Abstract]

Variable Interest Entities (VIEs)

Variable Interest Entities ("VIEs")

Our maximum risk of loss in VIEs in which we are not the primary beneficiary at March 31, 2019 is presented in the table below.

$ in thousands	Carrying Amount	Company's Maximum Risk of Loss
Non-Agency CMBS	3,455,806	3,455,806
Non-Agency RMBS	1,186,896	1,186,896
Investments in unconsolidated ventures	24,129	24,129
Total	4,666,831	4,666,831

Refer to Note 4 - "Mortgage-Backed and Credit Risk Transfer Securities" and Note 5 - "Other Assets" for additional details regarding these investments.

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Mortgage-Backed and Credit Risk Transfer Securities

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Mortgage-Backed and Credit Risk Transfer Securities

Mortgage-Backed and Credit Risk Transfer Securities

The following tables summarize our mortgage-backed securities ("MBS") and GSE CRT portfolio by asset type as of March 31, 2019 and December 31, 2018.

March 31, 2019
$ in thousands	Principal/ Notional Balance	Unamortized Premium (Discount)		Amortized Cost	Unrealized Gain/ (Loss), net		Fair Value	Period- end Weighted Average Yield (1)
Agency RMBS:
15 year fixed-rate	343,116	2,595		345,711	6,391		352,102	3.34	%
30 year fixed-rate	12,264,517	386,145		12,650,662	65,974		12,716,636	3.66	%
ARM*	6,215	184		6,399	5		6,404	3.64	%
Hybrid ARM*	170,397	3,602		173,999	(478	)	173,521	3.11	%
Total Agency RMBS pass-through	12,784,245	392,526		13,176,771	71,892		13,248,663	3.64	%
Agency-CMO (2)	913,574	(585,878	)	327,696	(545	)	327,151	3.65	%
Agency CMBS	1,898,205	35,961		1,934,166	67,387		2,001,553	3.48	%
Non-Agency CMBS (3)	4,127,880	(737,241	)	3,390,639	65,167		3,455,806	5.08	%
Non-Agency RMBS (4)(5)(6)	2,774,428	(1,700,612	)	1,073,816	113,080		1,186,896	6.89	%
GSE CRT (7)	823,578	19,823		843,401	64,128		907,529	3.16	%
Total	23,321,910	(2,575,421	)	20,746,489	381,109		21,127,598	4.01	%

* Adjustable-rate mortgage ("ARM")

(1) Period-end weighted average yield is based on amortized cost as of March 31, 2019 and incorporates future prepayment and loss assumptions.

(2) Agency collateralized mortgage obligation ("Agency-CMO") includes interest-only securities ("Agency IO"), which represent 67.8% of principal/notional balance, 10.3% of amortized cost and 9.7% of fair value.

(3) Non-Agency CMBS includes interest-only securities which represent 14.6% of principal/notional balance, 0.4% of amortized cost and 0.4% of fair value.

(4) Non-Agency RMBS is 54.9% fixed rate, 39.7% variable rate, and 5.4% floating rate based on fair value. Coupon payments on variable rate investments are based upon changes in the underlying ARM and Hybrid ARM loan coupons, while coupon payments on floating rate investments are based upon a spread to a reference index.

(5) Of the total discount in non-Agency RMBS, $140.8 million is non-accretable calculated using the principal/notional balance and based on estimated future cash flows of the securities.

(6) Non-Agency RMBS includes interest-only securities ("non-Agency IO") which represent 54.6% of principal/notional balance, 2.2% of amortized cost and 2.1% of fair value.

(7) GSE CRT weighted average yield excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

December 31, 2018
$ in thousands	Principal/Notional Balance	Unamortized Premium (Discount)		Amortized Cost	Unrealized Gain/ (Loss), net		Fair Value	Period- end Weighted Average Yield (1)
Agency RMBS:
15 year fixed-rate	417,233	5,077		422,310	1,944		424,254	3.27	%
30 year fixed-rate	9,599,301	298,693		9,897,994	(125,225	)	9,772,769	3.55	%
ARM	105,453	350		105,803	(56	)	105,747	2.74	%
Hybrid ARM	548,133	13,425		561,558	(7,357	)	554,201	2.80	%
Total Agency RMBS pass-through	10,670,120	317,545		10,987,665	(130,694	)	10,856,971	3.49	%
Agency-CMO (2)	907,862	(631,180	)	276,682	(8,991	)	267,691	3.61	%
Agency CMBS	973,122	15,058		988,180	14,330		1,002,510	3.54	%
Non-Agency CMBS (3)	4,024,715	(727,307	)	3,297,408	(10,949	)	3,286,459	5.05	%
Non-Agency RMBS (4)(5)(6)	2,800,335	(1,748,223	)	1,052,112	111,570		1,163,682	7.24	%
GSE CRT (7)	738,529	21,259		759,788	59,541		819,329	3.10	%
Total	20,114,683	(2,752,848	)	17,361,835	34,807		17,396,642	4.00	%

(1) Period-end weighted average yield is based on amortized cost as of December 31, 2018 and incorporates future prepayment and loss assumptions.

(2) Agency collateralized mortgage obligation ("Agency-CMO") includes interest-only securities ("Agency IO"), which represent 73.6% of principal (notional) balance, 13.5%of amortized cost and 12.4% of fair value.

(3) Non-Agency CMBS includes interest-only securities which represent 15.0% of principal/notional balance, 0.4% of amortized cost and 0.5% of fair value.

(4) Non-Agency RMBS is 43.5% variable rate, 50.7% fixed rate, and 5.8% floating rate based on fair value. Coupon payments on variable rate investments are based upon changes in the underlying ARM and Hybrid ARM loan coupons, while coupon payments on floating rate investments are based upon a spread to a reference index.

(5) Of the total discount in non-Agency RMBS, $145.6 million is non-accretable calculated using the principal/notional balance andbased on estimated future cash flows of the securities.

(6) Non-Agency RMBS includes interest-only securities, which represent 55.4% of principal/notional balance, 2.3% of amortized cost and 2.4% of fair value.

(7) GSE CRT weighted average yield excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

The following table presents the fair value of our available-for-sale securities and securities accounted for under the fair value option by asset type as of March 31, 2019 and December 31, 2018. We have elected the fair value option for all of our RMBS IOs, our MBS purchased on or after September 1, 2016 and our GSE CRTs purchased on or after August 24, 2015. As of March 31, 2019 and December 31, 2018, approximately 76% and 67%, respectively, of our MBS and GSE CRTs are accounted for under the fair value option.

	March 31, 2019			December 31, 2018
$ in thousands	Available-for-sale Securities	Securities under Fair Value Option	Total Fair Value	Available-for-sale Securities	Securities under Fair Value Option	Total Fair Value
Agency RMBS:
15 year fixed-rate	135,169	216,933	352,102	204,347	219,907	424,254
30 year fixed-rate	918,778	11,797,858	12,716,636	1,093,070	8,679,699	9,772,769
ARM	6,404	—	6,404	105,747	—	105,747
Hybrid ARM	141,320	32,201	173,521	521,199	33,002	554,201
Total RMBS Agency pass-through	1,201,671	12,046,992	13,248,663	1,924,363	8,932,608	10,856,971
Agency-CMO	166,730	160,421	327,151	168,385	99,306	267,691
Agency CMBS	—	2,001,553	2,001,553	—	1,002,510	1,002,510
Non-Agency CMBS	2,144,187	1,311,619	3,455,806	2,153,403	1,133,056	3,286,459
Non-Agency RMBS	916,158	270,738	1,186,896	961,445	202,237	1,163,682
GSE CRT	579,142	328,387	907,529	586,231	233,098	819,329
Total	5,007,888	16,119,710	21,127,598	5,793,827	11,602,815	17,396,642

The components of the carrying value of our MBS and GSE CRT portfolio at March 31, 2019 and December 31, 2018 are presented below.

	March 31, 2019
$ in thousands	MBS and GSE CRT Securities		Interest-Only Securities		Total
Principal/ notional balance	20,734,762		2,587,148		23,321,910
Unamortized premium	488,161		—		488,161
Unamortized discount	(545,248	)	(2,518,334	)	(3,063,582	)
Gross unrealized gains (1)	447,903		5,613		453,516
Gross unrealized losses (1)	(67,022	)	(5,385	)	(72,407	)
Fair value	21,058,556		69,042		21,127,598

	December 31, 2018
$ in thousands	MBS and GSE CRT Securities		Interest-Only Securities		Total
Principal/ notional balance	17,442,367		2,672,316		20,114,683
Unamortized premium	395,907		—		395,907
Unamortized discount	(549,988	)	(2,598,767	)	(3,148,755	)
Gross unrealized gains (1)	238,579		7,448		246,027
Gross unrealized losses (1)	(204,664	)	(6,556	)	(211,220	)
Fair value	17,322,201		74,441		17,396,642

(1) Gross unrealized gains and losses includes gains (losses) recognized in net income for securities accounted for as derivatives or under the fair value option as well as gains (losses) for available-for-sale securities which are recognized as adjustments to other comprehensive income. Realization occurs upon sale or settlement of such securities. Further detail on the components of our total gains (losses) on investments, net for the three months ended March 31, 2019 and 2018 is provided below within this Note 4.

The following table summarizes our MBS and GSE CRT portfolio according to estimated weighted average life classifications as of March 31, 2019 and December 31, 2018. 

$ in thousands	March 31, 2019	December 31, 2018
Less than one year	49,768	110,020
Greater than one year and less than five years	5,188,229	3,508,100
Greater than or equal to five years	15,889,601	13,778,522
Total	21,127,598	17,396,642

The following tables present the estimated fair value and gross unrealized losses of our MBS and GSE CRTs by length of time that such securities have been in a continuous unrealized loss position at March 31, 2019 and December 31, 2018.

March 31, 2019

	Less than 12 Months				12 Months or More				Total
$ in thousands	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities
Agency RMBS:
15 year fixed-rate	8,398	(28	)	21	35,070	(165	)	25	43,468	(193	)	46
30 year fixed-rate	1,286	(11	)	4	4,448,849	(50,925	)	146	4,450,135	(50,936	)	150
ARM	—	—		—	2,760	(60	)	2	2,760	(60	)	2
Hybrid ARM	3,059	(6	)	1	101,210	(1,595	)	24	104,269	(1,601	)	25
Total Agency RMBS pass-through (1)	12,743	(45	)	26	4,587,889	(52,745	)	197	4,600,632	(52,790	)	223
Agency-CMO (2)	9,749	(3,276	)	16	109,177	(3,380	)	20	118,926	(6,656	)	36
Non-Agency CMBS (3)	94,622	(538	)	9	478,174	(10,226	)	41	572,796	(10,764	)	50
GSE CRT (4)	62,965	(381	)	4	—	—		—	62,965	(381	)	4
Non-Agency RMBS (5)	63,102	(1,225	)	13	93,291	(591	)	15	156,393	(1,816	)	28
Total	243,181	(5,465	)	68	5,268,531	(66,942	)	273	5,511,712	(72,407	)	341

(1) Includes Agency RMBS with a fair value of $4.2 billion for which the fair value option has been elected. Such securities have unrealized losses of $47.0 million.

(2) Includes Agency IO and Agency-CMO with fair value of $13.9 million and $17.9 million, respectively, for which the fair value option has been elected. These Agency IO and Agency-CMO securities have unrealized losses of $4.6 million and $64,000, respectively.

(3) Includes non-Agency CMBS with a fair value of $323.9 million for which the fair value option has been elected. Such securities have unrealized losses of $3.1 million.

(4) Fair value option has been elected for all GSE CRT that are in an unrealized loss position.

(5) Includes non-Agency RMBS and non-Agency IO with a fair value of $6.1 million and $4.9 million, respectively for which the fair value option has been elected. Such securities have unrealized losses of $223,000 and $821,000, respectively.

December 31, 2018

	Less than 12 Months				12 Months or More				Total
$ in thousands	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities
Agency RMBS:
15 year fixed-rate	86,241	(814	)	50	16,660	(189	)	22	102,901	(1,003	)	72
30 year fixed-rate	3,966,347	(49,182	)	158	2,846,090	(94,716	)	95	6,812,437	(143,898	)	253
ARM	2,632	(28	)	1	49,954	(785	)	10	52,586	(813	)	11
Hybrid ARM	6,758	(59	)	2	453,463	(8,390	)	71	460,221	(8,449	)	73
Total Agency RMBS pass-through (1)	4,061,978	(50,083	)	211	3,366,167	(104,080	)	198	7,428,145	(154,163	)	409
Agency-CMO (2)	152,962	(6,315	)	34	101,705	(5,100	)	19	254,667	(11,415	)	53
Non-Agency CMBS (3)	1,214,691	(17,778	)	94	659,298	(25,381	)	52	1,873,989	(43,159	)	146
Non-Agency RMBS (4)	87,850	(1,152	)	19	89,265	(1,138	)	16	177,115	(2,290	)	35
GSE CRT(5)	9,639	(193	)	1	—	—		—	9,639	(193	)	1
Total	5,527,120	(75,521	)	359	4,216,435	(135,699	)	285	9,743,555	(211,220	)	644

(1) Includes Agency RMBS with a fair value of $6.1 billion for which the fair value option has been elected. Such securities have unrealized losses of $130.2 million.

(2) Includes Agency IO and Agency-CMO with fair value of $21.8 million and $66.0 million, respectively, for which the fair value option has been elected. These Agency IO and Agency-CMO securities have unrealized losses of $6.3 million and $845,000, respectively.

(3) Includes non-Agency CMBS with a fair value of $831.3 million for which the fair value option has been elected. Such securities have unrealized losses of $26.3 million.

(4) Includes non-Agency RMBS and non-Agency IO with a fair value of $6.2 million and $3.7 million for which the fair value option has been elected. Such securities have unrealized losses of $79,000 and $269,000, respectively.

(5) Fair value option has been elected for all GSE CRT that are in an unrealized loss position.

Gross unrealized losses on our Agency RMBS, Agency CMBS, GSE CRT and CMO were $55.3 million at March 31, 2019 (December 31, 2018: $159.3 million). Due to the inherent credit quality of Agency RMBS, Agency CMBS and Agency-CMO, we determined that at March 31, 2019 and December 31, 2018, any unrealized losses on these securities are not other than temporary.

Gross unrealized losses on our Agency IO, non-Agency RMBS and non-Agency CMBS were $17.1 million at March 31, 2019 (December 31, 2018: $51.9 million). We did not consider these unrealized losses to be credit related, but rather due to non-credit related factors such as interest rates, prepayment speeds, and market fluctuations. These investment securities are included in our assessment for other-than-temporary impairment ("OTTI").

We assess our investment securities for OTTI on a quarterly basis. When the fair value of an investment is less than its amortized cost at the balance sheet date of the reporting period for which impairment is assessed, the impairment is designated as either "temporary" or "other-than-temporary." This analysis includes a determination of estimated future cash flows through an evaluation of the characteristics of the underlying loans and the structural features of the investment. Underlying loan characteristics reviewed include, but are not limited to, delinquency status, loan-to-value ratios, borrower credit scores, occupancy status and geographic concentration.

The following table summarizes OTTI included in earnings for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
$ in thousands	2019	2018
RMBS interest-only securities	1,463	4,309
Non-Agency RMBS (1)	313	50
Total	1,776	4,359

(1) Amounts disclosed relate to credit losses on debt securities for which a portion of an other-than-temporary impairment was recognized in other comprehensive income.

OTTI on RMBS interest-only securities was recorded as a reclassification from an unrealized to realized loss within gain (loss) on investments, net on the condensed consolidated statements of operations because we account for these securities under the fair value option. As of March 31, 2019, we did not intend to sell the securities and determined that it was not more likely than not that we will be required to sell the securities.

The following table summarizes the components of our total gain (loss) on investments, net for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019		2018
Gross realized gains on sale of investments	1,202		—
Gross realized losses on sale of investments	(12,317	)	(9,237	)
Other-than-temporary impairment losses	(1,776	)	(4,359	)
Net unrealized gains and losses on MBS accounted for under the fair value option	280,039		(147,195	)
Net unrealized gains and losses on GSE CRT accounted for under the fair value option	1,234		434
Net unrealized gains and losses on trading securities	—		(13	)
Total gain (loss) on investments, net	268,382		(160,370	)

The following tables present components of interest income recognized on our MBS and GSE CRT portfolio for the three months ended March 31, 2019 and 2018. GSE CRT interest income excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

For the three months ended March 31, 2019

$ in thousands	Coupon Interest	Net (Premium Amortization)/Discount Accretion		Interest Income
Agency RMBS and Agency CMBS	130,197	(12,725	)	117,472
Non-Agency CMBS	38,830	3,031		41,861
Non-Agency RMBS	14,267	3,922		18,189
GSE CRT	8,596	(1,178	)	7,418
Other	552	—		552
Total	192,442	(6,950	)	185,492

For the three months ended March 31, 2018

$ in thousands	Coupon Interest	Net (Premium Amortization)/Discount Accretion		Interest Income
Agency RMBS and Agency CMBS	108,317	(23,222	)	85,095
Non-Agency CMBS	37,293	1,426		38,719
Non-Agency RMBS	14,012	5,177		19,189
GSE CRT	6,525	(697	)	5,828
Other	172	—		172
Total	166,319	(17,316	)	149,003

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Other Assets

3 Months Ended

Mar. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Assets

Other Assets

The following table summarizes our other assets as of March 31, 2019 and December 31, 2018.

$ in thousands	March 31, 2019	December 31, 2018
FHLBI stock	74,250	74,250
Loan participation interest	53,827	54,981
Commercial loans, held-for-investment	24,454	31,582
Investments in unconsolidated ventures	24,129	24,012
Prepaid expenses and other assets	1,253	1,234
Total	177,913	186,059

IAS Services LLC, our wholly-owned captive insurance subsidiary, is required to purchase and hold Federal Home Loan Bank of Indianapolis ("FHLBI") stock as a condition of membership in the FHLBI. The stock is recorded at cost.

In August 2018, we acquired a participation interest in a secured loan collateralized by mortgage servicing rights. The loan has a two year term subject to a one year extension at the borrower's option. The participation interest bears interest at a floating rate based on LIBOR plus a spread. The weighted average asset yield for the participation interest was 6.14% as of March 31, 2019 and 6.06% as of December 31, 2018. We elected to account for the investment using the fair value option. Refer to Note 14 - "Commitments and Contingencies" for additional details regarding our unfunded commitment on this loan participation interest.

As of March 31, 2019, our commercial loan portfolio consisted of one commercial loan with a weighted average maturity of 1.9 years (December 31, 2018: two commercial loans with a weighted average maturity of 1.7 years). The loans had a weighted average coupon rate of 10.99% as of March 31, 2019 and 10.69% as of December 31, 2018. The loans were not impaired, and we have not recorded an allowance for loan losses as of March 31, 2019 and December 31, 2018 based on our analysis of credit quality factors as described in Note 2 - "Summary of Significant Accounting Policies" included in the consolidated financial statements of our Annual Report on Form 10-K for the year ended December 31, 2018.

We have invested in unconsolidated ventures that are managed by an affiliate of our Manager. The unconsolidated ventures invest in our target assets. Refer to Note 14 - "Commitments and Contingencies" for additional details regarding our commitments to these unconsolidated ventures.

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Borrowings

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Borrowings

Borrowings

We finance the majority of our investment portfolio through repurchase agreements and secured loans. The following tables summarize certain characteristics of our borrowings at March 31, 2019 and December 31, 2018. Refer to Note 7 - "Collateral Positions" for collateral pledged under our repurchase agreements and secured loans.

$ in thousands	March 31, 2019
				Weighted
		Weighted		Average
		Average		Remaining
	Amount	Interest		Maturity
	Outstanding	Rate		(days)
Repurchase Agreements:
Agency RMBS	11,868,925	2.68	%	67
Agency CMBS	1,639,097	2.67	%	72
Non-Agency CMBS	1,642,106	3.57	%	18
Non-Agency RMBS	887,186	3.46	%	25
GSE CRT	746,703	3.49	%	20
Loan participation interest	40,370	4.09	%	515
Total Repurchase Agreements	16,824,387	2.85	%	59
Secured Loans	1,650,000	2.76	%	1862
Total Borrowings	18,474,387	2.84	%	220

$ in thousands	December 31, 2018
				Weighted
		Weighted		Average
		Average		Remaining
	Amount	Interest		Maturity
	Outstanding	Rate		(days)
Repurchase Agreements:
Agency RMBS	9,529,352	2.56	%	36
Agency CMBS	810,450	2.53	%	31
Non-Agency CMBS	1,616,473	3.56	%	19
Non-Agency RMBS	923,959	3.60	%	26
GSE CRT	681,014	3.48	%	21
Loan participation interest	41,236	4.09	%	605
Total Repurchase Agreements	13,602,484	2.80	%	34
Secured Loans	1,650,000	2.68	%	1952
Total Borrowings	15,252,484	2.79	%	242

The following table shows the aggregate amount of maturities of our outstanding borrowings:

$ in thousands	As of
Borrowings maturing within:	March 31, 2019
4/1/2019 - 3/31/2020	17,084,017
4/1/2020 - 3/31/2021	140,370
4/1/2021 - 3/31/2022	—
4/1/2022 - 3/31/2023	—
4/1/2023 - 3/31/2024	—
Thereafter	1,250,000
Total	18,474,387

Repurchase Agreements

Our repurchase agreements generally bear interest at a contractually agreed upon rate and have maturities ranging from one month to six months. Our repurchase agreement that is collateralized by a loan participation interest bears interest at a floating rate based on LIBOR plus a spread and matures on August 27, 2020. Repurchase agreements are accounted for as secured borrowings since we maintain effective control of the financed assets. Repurchase agreements are subject to certain financial covenants. We were in compliance with these covenants at March 31, 2019.

Our repurchase agreement collateral ratio (MBS, GSE CRTs and a loan participation interest pledged as collateral/Amount Outstanding) was 110% as of March 31, 2019 (December 31, 2018: 111%).

Secured Loans

Our wholly-owned captive insurance subsidiary, IAS Services LLC, is a member of the FHLBI. As a member of the FHLBI, IAS Services LLC has borrowed funds from the FHLBI in the form of secured loans.

As of March 31, 2019, IAS Services LLC had $1.65 billion in outstanding secured loans from the FHLBI. These secured loans have floating rates that are based on the three-month FHLB swap rate plus a spread. For the three months ended March 31, 2019, IAS Services LLC had weighted average borrowings of $1.65 billion with a weighted average borrowing rate of 2.70% and a weighted average maturity of 5.1 years.

The Federal Housing Finance Agency’s ("FHFA") final rule governing Federal Home Loan Bank membership (the "FHFA Rule") became effective on February 19, 2016. The FHFA Rule permits existing captive insurance companies, such as IAS Services LLC, to remain members until February 2021. New advances or renewals that mature after February 2021 are prohibited. The FHLBI has indicated it will honor the contractual maturity dates of existing advances to IAS Services LLC that were made prior to February 19, 2016 and extend beyond February 2021. We do not expect there to be any impact to our existing FHLBI borrowings under the FHFA rule. The ability to borrow from the FHLBI is subject to our continued creditworthiness, pledging of sufficient eligible collateral to secure advances, and compliance with certain agreements with FHLBI and FHFA rules.

As discussed in Note 5 - "Other Assets," IAS Services LLC is required to purchase and hold a certain amount of FHLBI stock, which is based, in part, upon the outstanding principal balance of secured loans from the FHLBI.

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Collateral Positions

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Collateral Positions

Collateral Positions

The following table summarizes the fair value of collateral that we have pledged and held under our repurchase agreements, secured loans, interest rate swaps, futures contracts and currency forward contracts as of March 31, 2019 and December 31, 2018. Refer to Note 2 - "Summary of Significant Accounting Policies - Fair Value Measurements" of our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 for a description of how we determine fair value. RMBS, CMBS and GSE CRT collateral pledged is included in mortgage-backed and credit risk transfer securities on our condensed consolidated balance sheets. Loan participation interest collateral pledged is included in other assets on our condensed consolidated balance sheets. Cash collateral pledged on secured loans, centrally cleared swaps, bilateral interest rate swaps and currency forward contracts is classified as restricted cash on our condensed consolidated balance sheets. Cash collateral pledged on futures contracts is classified as due from counterparties on our condensed consolidated balance sheets.

Cash collateral held on bilateral swaps that is not restricted for use is included in cash and cash equivalents on our condensed consolidated balance sheets and the liability to return the collateral is included in collateral held payable. Non-cash collateral held is only recognized if the counterparty defaults or if we sell the pledged collateral. As of March 31, 2019 and December 31, 2018, we did not recognize any non-cash collateral held.

$ in thousands	As of
Collateral Pledged	March 31, 2019	December 31, 2018
Repurchase Agreements:
Agency RMBS	12,575,947	10,158,404
Agency CMBS	1,763,779	870,702
Non-Agency CMBS	2,072,829	2,016,202
Non-Agency RMBS	1,079,223	1,127,911
GSE CRT	907,529	819,328
Loan participation interest	53,827	54,981
Total repurchase agreements collateral pledged	18,453,134	15,047,528
Secured Loans:
Agency RMBS	686,656	702,952
Non-Agency CMBS	1,260,396	1,227,412
Total secured loans collateral pledged	1,947,052	1,930,364
Interest Rate Swaps, Futures Contracts and Currency Forward Contracts:
Agency RMBS	197,958	159,914
Cash (1)	18,025	13,500
Total interest rate swaps, futures contracts and currency forward contracts collateral pledged	215,983	173,414
Total collateral pledged:
Mortgage-backed and credit risk transfer securities	20,544,317	17,082,825
Loan participation interest	53,827	54,981
Cash	18,025	13,500
Total collateral pledged	20,616,169	17,151,306
	As of
Collateral Held	March 31, 2019	December 31, 2018
Interest Rate Swaps:
Cash	2,273	18,083
Non-cash collateral	—	—
Total collateral held	2,273	18,083

(1) Includes restricted cash of $5,025,000 pledged as collateral on centrally cleared swaps.

Repurchase Agreements

Collateral pledged with our repurchase agreement counterparties is segregated in our books and records. The repurchase agreement counterparties have the right to resell and repledge the collateral posted but have the obligation to return the pledged collateral, or substantially the same collateral if agreed to by us, upon maturity of the repurchase agreement. Under the repurchase agreements, the respective lender retains the contractual right to mark the underlying collateral to fair value as determined by a pricing service agreed to by the respective lender and us. We would be required to provide additional collateral or fund margin calls if the value of pledged assets declined. We intend to maintain a level of liquidity that will enable us to meet margin calls.

Secured Loans

The ability to borrow from the FHLBI is subject to our continued creditworthiness, pledging of sufficient eligible collateral to secure advances, and compliance with FHLBI and FHFA rules. Collateral pledged with the FHLBI is held in trust for the benefit of the FHLBI and is not commingled with our other assets. The FHLBI does not have the right to resell or repledge collateral posted unless an event of default occurs. The FHLBI retains the right to mark the underlying collateral for FHLBI advances to fair value as determined by the FHLBI in its sole discretion. IAS Services LLC would be required to provide additional collateral or fund margin calls if the value of pledged assets declines.

Interest Rate Swaps

Collateral pledged with our interest rate swap counterparties is segregated in our books and records. We have two types of interest rate swap agreements: bilateral interest rate swaps that are governed by an International Swaps and Derivatives Association ("ISDA") agreement and interest rate swaps that are centrally cleared by a registered clearing organization such as the Chicago Mercantile Exchange ("CME") and LCH Limited ("LCH") through a Futures Commission Merchant ("FCM"). Interest rate swaps that are governed by an ISDA agreement provide for bilateral collateral pledging based on the counterparties' market value. The counterparties have the right to repledge the collateral posted, but have the obligation to return the pledged collateral, or substantially the same collateral, if agreed to by us, as the market value of the interest rate swaps change.

We are required to pledge initial margin and daily variation margin for our interest rate swaps that are centrally cleared. The FCM determines the fair value of our centrally cleared swaps, including daily variation margin. The daily variation margin payment for centrally cleared interest rate swaps is characterized as settlement of the derivative itself rather than collateral. Accordingly, cash collateral pledged on our centrally cleared interest rate swaps is settled against the fair value of these swaps.

Futures Contracts

We are required to pledge initial margin and daily variation margin for our futures contracts that is based on the fair value of our contracts as determined by our FCM. The daily variation margin payment for our futures contracts is characterized as settlement of the futures contract itself rather than collateral. Accordingly, cash collateral pledged on our futures contracts is settled against the fair value of these contracts.

Currency Forward Contracts

Collateral pledged with our currency forward counterparty is segregated in our books and records. Our currency forward contract provides for bilateral collateral pledging based on market value as determined by the counterparty and can be in the form of cash or securities. Our counterparty has the right to repledge the collateral posted, but has the obligation to return the pledged collateral, or substantially the same collateral, if agreed to by us, as the market value of the currency forward contract changes.

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Derivatives and Hedging Activities

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging Activities

Derivatives and Hedging Activities

The following table summarizes changes in the notional amount of our derivative instruments during 2019:

$ in thousands	Notional Amount as of December 31, 2018	Additions	Settlement, Termination, Expiration or Exercise		Notional Amount as of March 31, 2019
Interest Rate Swaps	12,370,000	4,575,000	(4,050,000	)	12,895,000
Futures Contracts	1,689,900	1,586,400	(1,689,900	)	1,586,400
Currency Forward Contracts	23,149	25,534	(23,149	)	25,534
Credit Derivatives	526,912	—	(9,378	)	517,534
Total	14,609,961	6,186,934	(5,772,427	)	15,024,468

Refer to Note 7 - "Collateral Positions" for further information regarding our collateral pledged to and received from our interest rate swap counterparties.

Interest Rate Swaps

Our repurchase agreements are usually settled on a short-term basis ranging from one to twelve months. At each settlement date, we typically refinance each repurchase agreement at the market interest rate at that time. In addition, our secured loans have floating interest rates. As such, we are exposed to changing interest rates. Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposures to interest rate movements. To accomplish these objectives, we primarily use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps involve making fixed-rate payments to a counterparty in exchange for the receipt of variable-rate amounts over the life of the agreements without exchange of the underlying notional amount.

Amounts recorded in accumulated other comprehensive income ("AOCI") before we discontinued cash flow hedge accounting for our interest rate swaps are reclassified to interest expense on repurchase agreements on the condensed consolidated statements of operations as interest is accrued and paid on the related repurchase agreements over the remaining life of the interest rate swap agreements. We reclassified $5.9 million as a decrease (March 31, 2018: $6.5 million as a decrease) to interest expense for the three months ended March 31, 2019. During the next 12 months, we estimate that $23.8 million will be reclassified as a decrease to interest expense, repurchase agreements. As of March 31, 2019, $93.8 million (December 31, 2018: $99.6 million) of unrealized gains on discontinued cash flow hedges, net are still included in accumulated other comprehensive income and will be reclassified to interest expense over a period of time through December 15, 2023.

As of March 31, 2019 and December 31, 2018, we had the following interest rate swaps outstanding:

$ in thousands	As of March 31, 2019
Maturities	Notional Amount(1)	Weighted Average Fixed Pay Rate		Weighted Average Receive Rate		Weighted Average Years to Maturity
2020	1,000,000	2.72	%	2.50	%	1.4
2021	2,800,000	2.49	%	2.54	%	2.2
2022	2,550,000	2.13	%	2.61	%	3.2
2023	1,500,000	2.21	%	2.48	%	4.3
2024	1,600,000	2.27	%	2.65	%	4.8
Thereafter	3,445,000	2.46	%	2.52	%	7.8
Total	12,895,000	2.37	%	2.55	%	4.4

$ in thousands	As of December 31, 2018
Maturities	Notional Amount(2)	Weighted Average Fixed Pay Rate		Weighted Average Receive Rate		Weighted Average Years to Maturity
2019	1,500,000	2.70	%	2.47	%	0.9
2020	1,500,000	2.78	%	2.51	%	1.7
2021	2,300,000	2.51	%	2.58	%	2.5
2022	2,550,000	2.13	%	2.65	%	3.4
2023	1,600,000	2.39	%	2.47	%	4.7
Thereafter	2,920,000	2.47	%	2.55	%	6.8
Total	12,370,000	2.46	%	2.55	%	3.7

(1) Notional amount includes $8.4 billion of interest rate swaps that receive variable payments based on 1-month LIBOR and $4.5 billion of interest rate swaps that receive variable payments based on 3-month LIBOR as of March 31, 2019.

(2) Notional amount includes $6.7 billion of interest rate swaps that receive variable payments based on 1-month LIBOR and $5.7 billion of interest rate swaps that receive variable payments based on 3-month LIBOR as of December 31, 2018.

TBAs, Futures and Currency Forward Contracts

We purchase or sell certain TBAs and U.S. Treasury futures contracts to help mitigate the potential impact of changes in interest rates on the performance of our investment portfolio. We recognize realized and unrealized gains and losses associated with the purchases or sales of TBAs and U.S. Treasury futures contracts in gain (loss) on derivative instruments, net in our condensed consolidated statements of operations.

We use currency forward contracts to help mitigate the potential impact of changes in foreign currency exchange rates on our investments denominated in foreign currencies. We recognize realized and unrealized gains and losses associated with the purchases or sales of currency forward contracts in gain (loss) on derivative instruments, net in our condensed consolidated statements of operations. As of March 31, 2019, we had $25.5 million (December 31, 2018: $23.1 million) of notional amount of currency forward contracts denominated in Euro.

Credit Derivatives

Our GSE CRTs purchased prior to August 24, 2015 are accounted for as hybrid financial instruments consisting of a debt host contract and an embedded credit derivative. Embedded derivatives associated with GSE CRTs are recorded within mortgage-backed and credit risk transfer securities, at fair value, on the condensed consolidated balance sheets. At March 31, 2019 and December 31, 2018, terms of the GSE CRT embedded derivatives are:

$ in thousands	March 31, 2019	December 31, 2018
Fair value amount	25,305	22,771
Notional amount	517,534	526,912
Maximum potential amount of future undiscounted payments	517,534	526,912

Tabular Disclosure of the Effect of Derivative Instruments on the Balance Sheet

The table below presents the fair value of our derivative financial instruments, as well as their classification on the condensed consolidated balance sheets as of March 31, 2019 and December 31, 2018.

$ in thousands

Derivative Assets			Derivative Liabilities
	As of March 31, 2019	As of December 31, 2018		As of March 31, 2019	As of December 31, 2018
Balance Sheet	Fair Value	Fair Value	Balance Sheet	Fair Value	Fair Value
Interest Rate Swaps Asset	21,161	15,089	Interest Rate Swaps Liability	8,463	15,382
Currency Forward Contracts	311	—	Currency Forward Contracts	—	172
Futures Contracts	5,108	—	Futures Contracts	—	7,836

Tabular Disclosure of the Effect of Derivative Instruments on the Income Statement

The tables below present the effect of our credit derivatives on the condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018.

$ in thousands	Three months ended March 31, 2019
Derivative not designated as hedging instrument	Realized gain (loss), net	GSE CRT embedded derivative coupon interest	Unrealized gain (loss), net	Realized and unrealized credit derivative income (loss), net
GSE CRT Embedded Derivatives	—	5,350	2,534	7,884

$ in thousands	Three months ended March 31, 2018
Derivative not designated as hedging instrument	Realized gain (loss), net	GSE CRT embedded derivative coupon interest	Unrealized gain (loss), net		Realized and unrealized credit derivative income (loss), net
GSE CRT Embedded Derivatives	—	5,633	(2,468	)	3,165

The following table summarizes the effect of interest rate swaps, futures contracts and currency forward contracts reported in gain (loss) on derivative instruments, net on the condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018:

$ in thousands	Three Months Ended March 31, 2019
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)	Unrealized gain (loss), net	Gain (loss) on derivative instruments, net
Interest Rate Swaps	(165,884	)	4,509	12,991	(148,384	)
Futures Contracts	(66,688	)	—	12,944	(53,744	)
Currency Forward Contracts	185		—	483	668
Total	(232,387	)	4,509	26,418	(201,460	)

$ in thousands	Three Months Ended March 31, 2018
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)		Unrealized gain (loss), net		Gain (loss) on derivative instruments, net
Interest Rate Swaps	122,273		(12,112	)	32,374		142,535
Futures Contracts	(5,277	)	—		(1,612	)	(6,889	)
Currency Forward Contracts	(3,418	)	—		1,139		(2,279	)
Total	113,578		(12,112	)	31,901		133,367

Credit-risk-related Contingent Features

We have agreements with each of our bilateral derivative counterparties. Some of those agreements contain a provision whereby if we default on any of our indebtedness, including default whereby repayment of the indebtedness has not been accelerated by the lender, we could be declared in default on our derivative obligations.

At March 31, 2019, the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for non-performance risk related to bilateral interest rate swap agreements, was $8.4 million. We have minimum collateral posting thresholds with certain of our bilateral derivative counterparties and were required to pledge $12.1 million of collateral with these counterparties as of March 31, 2019. If we had breached any of these provisions at March 31, 2019, we could have been required to settle our obligations under these agreements at their termination value.

We also have an agreement with a clearing counterparty for our interest rate swaps that includes cross default provisions. The fair value of our centrally cleared interest rate derivative contracts, which includes accrued interest and variation margin but excludes any adjustment for non-performance risk, was a net asset of $17.8 million as of March 31, 2019.

We were in compliance with all of the financial provisions of these counterparty agreements as of March 31, 2019.

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Offsetting Assets and Liabilities

3 Months Ended

Mar. 31, 2019

Offsetting [Abstract]

Offsetting Assets and Liabilities

Offsetting Assets and Liabilities

Certain of our repurchase agreements and derivative transactions are governed by underlying agreements that generally provide for a right of offset under master netting arrangements (or similar agreements) in the event of default or in the event of bankruptcy of either party to the transactions. Assets and liabilities subject to such arrangements are presented on a gross basis in the condensed consolidated balance sheets.

The following tables present information about the assets and liabilities that are subject to master netting agreements (or similar agreements) and can potentially be offset on our condensed consolidated balance sheets at March 31, 2019 and December 31, 2018. The daily variation margin payment for centrally cleared interest rate swaps is characterized as settlement of the derivative itself rather than collateral. As of March 31, 2019, our derivative asset of $17.8 million (December 31, 2018: derivative liability of $13.2 million) related to centrally cleared interest rate swaps is not included in the table below as a result of this characterization of daily variation margin.

Offsetting of Derivative Assets

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments	Cash Collateral Received		Net Amount
Derivatives (1) (3)	8,742	—	8,742	—	(2,201	)	6,541

Offsetting of Derivative Liabilities, Repurchase Agreements and Secured Loans

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged	Net Amount
Derivatives (3)	8,463	—	8,463	(8,463	)	—	—
Repurchase Agreements (4)	16,824,387	—	16,824,387	(16,824,387	)	—	—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—	—
Total	18,482,850	—	18,482,850	(18,482,850	)	—	—

Offsetting of Derivative Assets

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments		Cash Collateral Received		Net Amount
Derivatives (1) (3)	15,089	—	15,089	(433	)	(14,656	)	—

Offsetting of Derivative Liabilities and Repurchase Agreements

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged		Net Amount
Derivatives (3)	10,239	—	10,239	(2,058	)	(7,836	)	345
Repurchase Agreements (4)	13,602,484	—	13,602,484	(13,602,484	)	—		—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—		—
Total	15,262,723	—	15,262,723	(15,254,542	)	(7,836	)	345

(1) Amounts represent derivatives in an asset position which could potentially be offset against derivatives in a liability position at March 31, 2019 and December 31, 2018, subject to a netting arrangement.

(2) Amounts represent collateral pledged that is available to be offset against liability balances associated with repurchase agreements, secured loans and derivatives.

(3) The fair value of securities pledged against our derivatives was $198.0 million (December 31, 2018: $159.9 million) at March 31, 2019, of which $164.8 million (December 31, 2018: $158.3 million) relates to initial margin pledged on centrally cleared interest rate swaps. Centrally cleared interest rate swaps are excluded from the tables above. Cash collateral received on our derivatives was $2.3 million and $18.1 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged by us on our futures contracts and interest rate swaps were $18.0 million and $13.5 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged on our centrally cleared interest rate swaps is settled against the fair value of these swaps and therefore excluded from the tables above at March 31, 2019 and December 31, 2018, respectively.

(4) The fair value of securities pledged against our borrowing under repurchase agreements was $18.5 billion and $15.0 billion at March 31, 2019 and December 31, 2018, respectively.

(5) The fair value of securities pledged against IAS Services LLC's borrowings under secured loans was $1.9 billion at March 31, 2019 and December 31, 2018, respectively.

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Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

Fair Value of Financial Instruments

A three-level valuation hierarchy exists for disclosure of fair value measurements based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. Observable inputs reflect readily obtainable data from independent sources, while unobservable inputs reflect our market assumptions. The three levels are defined as follows:

• Level 1 Inputs – Quoted prices for identical instruments in active markets.

• Level 2 Inputs – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable.

• Level 3 Inputs – Instruments with primarily unobservable value drivers.

The following tables present our assets and liabilities measured at fair value on a recurring basis.

	March 31, 2019
	Fair Value Measurements Using:
$ in thousands	Level 1	Level 2	Level 3	NAV as a practical expedient (3)	Total at Fair Value
Assets:
Mortgage-backed and credit risk transfer securities (1)(2)	—	21,102,293	25,305	—	21,127,598
Derivative assets	5,108	21,472	—	—	26,580
Other assets (4)	—	—	53,827	24,129	77,956
Total assets	5,108	21,123,765	79,132	24,129	21,232,134
Liabilities:
Derivative liabilities	—	8,463	—	—	8,463
Total liabilities	—	8,463	—	—	8,463

	December 31, 2018
	Fair Value Measurements Using:
$ in thousands	Level 1	Level 2	Level 3	NAV as a practical expedient (3)	Total at Fair Value
Assets:
Mortgage-backed and credit risk transfer securities (1)(2)	—	17,373,871	22,771	—	17,396,642
Derivative assets	—	15,089	—	—	15,089
Other assets (4)	—	—	54,981	24,012	78,993
Total assets	—	17,388,960	77,752	24,012	17,490,724
Liabilities:
Derivative liabilities	7,836	15,554	—	—	23,390
Total liabilities	7,836	15,554	—	—	23,390

(1) For more detail about the fair value of our MBS and GSE CRTs, refer to Note 4 - "Mortgage-Backed and Credit Risk Transfer Securities."

(2) Our GSE CRTs purchased prior to August 24, 2015 are accounted for as hybrid financial instruments with an embedded derivative. The hybrid financial instruments consist of debt host contracts classified as Level 2 and embedded derivatives classified as Level 3. As of March 31, 2019, the net embedded derivative asset position of $25.3 million includes $30.2 million of embedded derivatives in an asset position and $4.9 million of embedded derivatives in a liability position. As of December 31, 2018, the net embedded derivative asset position of $22.8 million includes $28.8 million of embedded derivatives in an asset position and $6.0 million of embedded derivatives in a liability position.

(3) Investments in unconsolidated ventures are valued using the net asset value ("NAV") as a practical expedient and are not subject to redemption, although investors may sell or transfer their interest at the approval of the general partner of the underlying funds. As of March 31, 2019 and December 31, 2018, the weighted average remaining term of our investments in unconsolidated ventures is 2.8 and 2.6 years, respectively.

(4) Includes $53.8 million and $55.0 million of a loan participation interest as of March 31, 2019 and December 31, 2018, respectively. The loan participation interest is transferable and bears interest at a variable rate based on LIBOR plus a spread and resets daily. As a result, the cost of the loan participation interest approximates its fair value.

The following table shows a reconciliation of the beginning and ending fair value measurements of our GSE CRT embedded derivatives, which we have valued utilizing Level 3 inputs:

	Three Months Ended March 31,
$ in thousands	2019	2018
Beginning balance	22,771	45,400
Unrealized credit derivative gains (losses), net	2,534	(2,468	)
Ending balance	25,305	42,932

The following table shows a reconciliation of the beginning and ending fair value measurements of our loan participation interest, which we have valued utilizing Level 3 inputs:

	Three Months Ended March 31,
$ in thousands	2019
Beginning balance	54,981
Advances	577
Repayments	(1,731	)
Ending balance	53,827

The following tables summarize significant unobservable inputs used in the fair value measurement of our GSE CRT embedded derivatives:

	Fair Value at	Valuation	Unobservable		Weighted
$ in thousands	March 31, 2019	Technique	Input	Range	Average
GSE CRT Embedded Derivatives	25,305	Market Comparables, Vendor Pricing	Weighted average life	2.5 - 5.6 years	4.0 years

	Fair Value at	Valuation	Unobservable		Weighted
$ in thousands	December 31, 2018	Technique	Input	Range	Average
GSE CRT Embedded Derivatives	22,771	Market Comparables, Vendor Pricing	Weighted average life	2.9 - 5.9 years	4.3 years

These significant unobservable inputs change according to market conditions and security performance. We estimate the weighted average life of GSE CRTs in order to identify GSE corporate debt with a similar maturity. We obtain our weighted average life estimates from a third party provider. Although weighted average life is a significant input, changes in weighted average life may not have an explicit directional impact on the fair value measurement.

The following table presents the carrying value and estimated fair value of our financial instruments that are not carried at fair value on the condensed consolidated balance sheets at March 31, 2019 and December 31, 2018:

	March 31, 2019		December 31, 2018
$ in thousands	Carrying Value	Estimated Fair Value	Carrying Value	Estimated Fair Value
Financial Assets
Commercial loans, held-for-investment	24,454	24,732	31,582	31,826
FHLBI stock	74,250	74,250	74,250	74,250
Total	98,704	98,982	105,832	106,076
Financial Liabilities
Repurchase agreements	16,824,387	16,825,642	13,602,484	13,602,050
Secured loans	1,650,000	1,650,000	1,650,000	1,650,000
Total	18,474,387	18,475,642	15,252,484	15,252,050

The following describes our methods for estimating the fair value for financial instruments not carried at fair value on the condensed consolidated balance sheets.

• The estimated fair value of commercial loans held-for-investment, included in "Other assets" on our condensed consolidated balance sheets, is a Level 3 fair value measurement. Subsequent to the origination or purchase, commercial loan investments are valued on a monthly basis by an independent third party valuation agent using a discounted cash flow technique.

• The estimated fair value of FHLBI stock, included in "Other assets" on our condensed consolidated balance sheets, is a Level 3 fair value measurement. FHLBI stock may only be sold back to the FHLBI at its discretion at par. As a result, the cost of the FHLBI stock approximates its fair value.

• The estimated fair value of repurchase agreements is a Level 3 fair value measurement based on an expected present value technique. This method discounts future estimated cash flows using rates we determined best reflect current market interest rates that would be offered for repurchase agreements with similar characteristics and credit quality.

• The estimated fair value of secured loans is a Level 3 fair value measurement. The secured loans have floating rates based on an index plus a spread and the spread is typically consistent with those demanded in the market. Accordingly, the interest rates on these secured loans are at market, and thus the carrying amount approximates fair value.

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Related Party Transactions

3 Months Ended

Mar. 31, 2019

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

Under the terms of our management agreement, our Manager and its affiliates provide us with our management team, including our officers and appropriate support personnel. Each of our officers is an employee of our Manager or one of its affiliates. We do not have any employees. Our Manager is not obligated to dedicate any of its employees exclusively to us, nor is our Manager obligated to dedicate any specific portion of time to our business. During the three months ended March 31, 2019, we reimbursed our Manager $183,000 (March 31, 2018: $214,000) for costs of support personnel that are fully dedicated to our business.

We have invested $62.0 million as of March 31, 2019 (December 31, 2018: $131.9 million) in money market or mutual funds managed by affiliates of our Manager. The investments are reported as cash and cash equivalents on our condensed consolidated balance sheets.

Management Fee Expense

We pay our Manager a management fee equal to 1.50% of our stockholders’ equity per annum. The fee is calculated and payable quarterly in arrears. For purposes of calculating the management fee, stockholders’ equity is equal to the sum of the net proceeds from all issuances of equity securities since inception including proceeds from the issuance of operating partnership units to an affiliate of our Manager, plus retained earnings at the end of the most recently completed calendar quarter (without taking into account any non-cash equity compensation expense incurred in current or prior periods), less any amount paid to repurchase common stock since inception. Stockholders equity excludes (i) any unrealized gains, losses or other items that do not affect realized net income (regardless of whether such items are included in other comprehensive income or loss, or in net income); (ii) cumulative net realized losses that are not attributable to permanently impaired investments and that relate to the investments for which market movement is accounted for in other comprehensive income; provided, however, that such adjustment shall not exceed cumulative unrealized net gains in other comprehensive income; (iii) one-time events pursuant to changes in U.S. GAAP; and (iv) certain non-cash items after discussions between our Manager and our independent directors and approval by a majority of our independent directors.

We do not pay any management fees on our investments in unconsolidated ventures that are managed by an affiliate of our Manager.

Expense Reimbursement

We are required to reimburse our Manager for our operating expenses incurred on our behalf, including directors and officers insurance, accounting services, auditing and tax services, filing fees, and miscellaneous general and administrative costs. Our reimbursement obligation is not subject to any dollar limitation.

The following table summarizes the costs incurred on our behalf by our Manager for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019	2018
Incurred costs, prepaid or expensed	1,604	1,492
Incurred costs, charged against equity as a cost of raising capital	320	165
Total incurred costs, originally paid by our Manager	1,924	1,657

Termination Fee

If we terminate our management agreement, we owe our Manager a termination fee equal to three times the sum of our average annual management fee during the 24-month period before termination, calculated as of the end of the most recently completed fiscal quarter.

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Stockholders' Equity

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Preferred Stock

Holders of our Series A Preferred Stock are entitled to receive dividends at an annual rate of 7.75% of the liquidation preference of $25.00 per share or $1.9375 per share per annum. Dividends are cumulative and payable quarterly in arrears.

Holders of our Series B Preferred Stock are entitled to receive dividends at an annual rate of 7.75% of the liquidation preference of $25.00 per share or $1.9375 per share per annum until December 27, 2024. After December 27, 2024, holders are entitled to receive dividends at a floating rate equal to three-month LIBOR plus a spread of 5.18% of the $25.00 liquidation preference per annum. Dividends are cumulative and payable quarterly in arrears.

Holders of our Series C Preferred Stock are entitled to receive dividends at an annual rate of 7.50% of the liquidation preference of $25.00 per share or $1.875 per share per annum until September 27, 2027. After September 27, 2027, holders are entitled to receive dividends at a floating rate equal to three-month LIBOR plus a spread of 5.289% of the $25.00 liquidation preference per annum. Dividends are cumulative and payable quarterly in arrears.

As of July 27, 2017, we had the option to redeem shares of Series A Preferred Stock for $25.00 per share, plus any accumulated and unpaid dividends through the date of redemption. We have the option to redeem shares of Series B Preferred Stock after December 27, 2024 and shares of Series C Preferred Stock after September 27, 2027 for $25.00 per share, plus any accumulated and unpaid dividends through the date of the redemption. Shares of Series B and Series C Preferred Stock are not redeemable, convertible into or exchangeable for any other property or any other securities of the Company prior to those times, except under circumstances intended to preserve our qualification as a REIT or upon the occurrence of a change in control.

In March 2019, we entered into an equity distribution agreement with a placement agent under which we may sell up to 7,000,000 shares of our preferred stock from time to time in at-the-market or privately negotiated transactions. These shares are registered with the SEC under our automatic shelf registration statement (as amended and/or supplemented). As of March 31, 2019, we have not sold any shares of preferred stock under the equity distribution agreement.

Common Stock

On February 7, 2019, we completed a public offering of 16,100,000 shares of common stock at the price of $15.73 per share. Total net proceeds were approximately $249.5 million after deducting estimated offering costs.

In March 2019, we amended our equity distribution agreement, dated December 18, 2017, with a placement agent under which we may sell up to 17,000,000 shares of our common stock from time to time in at-the-market or privately negotiated transactions. These shares are registered with the SEC under our automatic shelf registration statement (as amended and/or supplemented). During the three months ended March 31, 2019, we issued 572,000 shares of common stock under the equity distribution agreement for proceeds of $9.1 million, net of approximately $193,000 in commissions and fees.

Share Repurchase Program

During the three months ended March 31, 2019 and 2018, we did not repurchase any shares of our common stock. As of March 31, 2019, we had authority to purchase 18,239,082 shares of our common stock through our share repurchase program.

Share-Based Compensation

We established the 2009 Equity Incentive Plan for grants of common stock and other equity based awards to our independent directors and officers and employees of our Manager and its affiliates (the "Incentive Plan"). Under the Incentive Plan, a total of 1,000,000 shares of common stock are authorized for issuance. As of March 31, 2019, 748,492 shares of common stock remain available for future issuance under the Incentive Plan. The Incentive Plan was scheduled to terminate on June 30, 2019 but was amended and restated as of May 3, 2019 extending the term an additional ten years. See Note 15 - "Subsequent Events" for a description of the amended Incentive Plan terms.

We recognized compensation expense of approximately $113,000 (March 31, 2018: $93,000) for shares issued to our independent directors under the Incentive Plan for the three months ended March 31, 2019. During the three months ended March 31, 2019 and 2018, we issued 7,065 shares and 7,177 shares of common stock, respectively, to our independent directors. The fair market value of the shares granted was determined by the closing stock market price on the date of the grant. The grants vested immediately.

We recognized compensation expense of approximately $19,000 (March 31, 2018: $14,000) for the three months ended March 31, 2019 for restricted stock units awarded to employees of our Manager and its affiliates under the Incentive Plan. Our Manager reimburses us for the cost of these restricted stock awards under the terms of our management agreement. At March 31, 2019, there was approximately $185,000 of total unrecognized compensation cost related to restricted stock unit awards that is expected to be recognized over a period of up to 48 months, with a weighted-average remaining vesting period of 24 months.

The following table summarizes the activity related to restricted stock units awarded to employees of our Manager and its affiliates for the three months ended March 31, 2019.

	Three Months Ended March 31,
	2019
	Restricted Stock Units		Weighted Average Grant Date Fair Value (1)
Unvested at the beginning of the period	11,051		$	14.55
Shares granted during the period	6,189		15.92
Shares vested during the period	(4,720	)	14.48
Unvested at the end of the period	12,520		$	15.25

(1) The grant date fair value of restricted stock awards is based on the closing market price of our common stock at the grant date.

Accumulated Other Comprehensive Income

The following tables present the components of total other comprehensive income (loss), net and accumulated other comprehensive income ("AOCI") for the three months ended March 31, 2019 and 2018. The tables exclude gains and losses on MBS and GSE CRTs that are accounted for under the fair value option.

	Three Months Ended March 31, 2019
$ in thousands	Equity method investments		Available-for-sale securities	Derivatives and hedging		Total
Total other comprehensive income (loss)
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	—		52,349	—		52,349
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	—		10,147	—		10,147
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	—		—	(5,851	)	(5,851	)
Currency translation adjustments on investment in unconsolidated venture	(276	)	—	—		(276	)
Total other comprehensive income (loss)	(276	)	62,496	(5,851	)	56,369
AOCI balance at beginning of period	513		120,664	99,636		220,813
Total other comprehensive income (loss)	(276	)	62,496	(5,851	)	56,369
AOCI balance at end of period	237		183,160	93,785		277,182

	Three Months Ended March 31, 2018
$ in thousands	Equity method investments		Available-for-sale securities		Derivatives and hedging		Total
Total other comprehensive income (loss)
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	—		(132,317	)	—		(132,317	)
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	—		9,237		—		9,237
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	—		—		(6,539	)	(6,539	)
Currency translation adjustments on investment in unconsolidated venture	312		—		—		312
Total other comprehensive income (loss)	312		(123,080	)	(6,539	)	(129,307	)
AOCI balance at beginning of period	947		136,188		123,894		261,029
Total other comprehensive income (loss)	312		(123,080	)	(6,539	)	(129,307	)
Other comprehensive income/(loss) attributable to non-controlling interest	(4	)	1,552		82		1,630
AOCI balance at end of period	1,255		14,660		117,437		133,352

Amounts recorded in AOCI before we discontinued cash flow hedge accounting for our interest rate swaps are reclassified to interest expense on repurchase agreements on the condensed consolidated statements of operations as interest is accrued and paid on the related repurchase agreements over the remaining original life of the interest rate swap agreements.

Dividends

We declared the following dividends during the three months ended March 31, 2019 and 2018:

$ in thousands, except per share amounts	Dividends Declared
Series A Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
March 18, 2019	0.4844	2,713	April 25, 2019
2018
March 15, 2018	0.4844	2,713	April 25, 2018

$ in thousands, except per share amounts	Dividends Declared
Series B Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
February 14, 2019	0.4844	3,003	March 27, 2019
2018
February 15, 2018	0.4844	3,003	March 27, 2018

$ in thousands, except per share amounts	Dividends Declared
Series C Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
February 14, 2019	0.46875	5,391	March 27, 2019
2018
February 15, 2018	0.46875	5,391	March 27, 2018

$ in thousands, except per share amounts	Dividends Declared
Common Stock	Per Share	In Aggregate	Date of Payment
2019
March 18, 2019	0.45	57,720	April 26, 2019
2018
March 15, 2018	0.42	46,887	April 26, 2018

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Earnings per Common Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Earnings per Common Share

Earnings per Common Share

Earnings per share for the three months ended March 31, 2019 and 2018 is computed as follows:

	Three Months Ended March 31,
In thousands except per share amounts	2019	2018
Numerator (Income)
Basic Earnings:
Net income available to common stockholders	127,683	41,471
Effect of dilutive securities:
Income allocated to exchangeable senior notes	—	1,621
Income allocated to non-controlling interest	—	671
Dilutive net income available to stockholders	127,683	43,763
Denominator (Weighted Average Shares)
Basic Earnings:
Shares available to common stockholders	121,098	111,629
Effect of dilutive securities:
Restricted stock awards	12	20
Non-controlling interest OP units	—	1,425
Exchangeable senior notes	—	4,803
Dilutive Shares	121,110	117,877
Earnings per share:
Net income attributable to common stockholders
Basic	1.05	0.37
Diluted	1.05	0.37

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments and Contingencies

Commitments and contingencies may arise in the ordinary course of business. Our material off-balance sheet commitments as of March 31, 2019 are discussed below.

As discussed in Note 5 - "Other Assets", we have invested in unconsolidated ventures that are sponsored by an affiliate of our Manager. The unconsolidated ventures are structured as partnerships, and we invest in the partnerships as a limited partner. The entities are structured such that capital commitments are to be drawn down over the life of the partnership as investment opportunities are identified. As of March 31, 2019 and December 31, 2018, our undrawn capital and purchase commitments were $7.6 million and $10.0 million, respectively.

As discussed in Note 5 - "Other Assets", we have funded our portion of a commitment in a loan participation. The remainder of our commitment will be funded over the two year term of the loan based upon the financing needs of the borrower. As of March 31, 2019, we have an unfunded commitment of $21.2 million.

As discussed in Note 12 - "Stockholders' Equity", we have programs under which we may sell shares of our common and preferred stock from time to time in at-the-market or privately negotiated transactions. As of March 31, 2019, we had committed to sell 90,000 shares of common stock at an average price of $15.83 per share for total proceeds of $1.4 million, net of approximately $30,000 in commissions and fees that settled in April 2019.

We have entered into agreements with financial institutions to guarantee certain obligations of our subsidiaries. We would be required to perform under these guarantees in the event of certain defaults. We have not had prior claims or losses pursuant to these contracts and expect the risk of loss to be remote.

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Subsequent Events

3 Months Ended

Mar. 31, 2019

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On May 3, 2019, our shareholders approved the 2009 Equity Incentive Plan (the "Incentive Plan") as amended and restated. Under the amended and restated Incentive Plan, the number of shares of common stock available for issuance to our independent directors and officers and employees of our Manager and its affiliates was reduced to 200,000, and the term of the Incentive Plan was extended for an additional ten years.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation and Consolidation

Certain disclosures included in our Annual Report on Form 10-K are not required to be included on an interim basis in our quarterly reports on Form 10-Q. We have condensed or omitted these disclosures. Therefore, this Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2018.

Consolidation

condensed consolidated financial statements have been prepared in accordance with U.S. GAAP and consolidate the financial statements of the Company and our controlled subsidiaries. All significant intercompany transactions, balances, revenues and expenses are eliminated upon consolidation. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, consisting of normal recurring accruals, which are necessary for a fair statement of our financial condition and results of operations for the periods presented.

Reclassifications

Reclassifications

Our condensed consolidated balance sheet for the year ended December 31, 2018 presented in this Form 10-Q includes a reclassification of Commercial Loans, held-for-investment to Other assets to conform to our current period presentation.

Use of Estimates

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Examples of estimates include, but are not limited to, estimates of the fair values of financial instruments, interest income on mortgage-backed and credit risk transfer securities, provision for loan losses and other-than-temporary impairment charges. Actual results may differ from those estimates.

Accounting Pronouncements Recently Adopted and Pending Accounting Pronouncements

Accounting Pronouncements Recently Adopted

Effective January 1, 2019, we adopted the accounting guidance that aligns the measurement and classification for stock-based payments to non-employees with the guidance for stock-based payments to employees. Under the new guidance, the measurement of equity-classified non-employee awards is fixed at the grant date. The implementation of the guidance did not have a material impact on our financial statements.

Pending Accounting Pronouncements

In June 2016, new accounting guidance was issued for reporting credit losses for assets measured at amortized cost and available-for-sale securities. The new guidance significantly changes how entities will measure credit losses for most financial assets, including loans, that are not measured at fair value through net income. The guidance replaces the existing “incurred loss” model with an “expected loss” model for instruments measured at amortized cost, and require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount, as they do today under the other-than-temporary impairment model. The new guidance also simplifies the accounting model for purchased credit-impaired debt securities and loans. We are required to adopt the new guidance in the first quarter of 2020 by recording a cumulative effect adjustment to retained earnings as of January 1, 2020. We are currently evaluating the potential impacts of the new guidance and proposed amendments to the new guidance on our consolidated financial statements.

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Variable Interest Entities ("VIEs") (Tables)

3 Months Ended

Mar. 31, 2019

Variable Interest Entity Disclosure [Abstract]

Maximum Risk of Loss

Our maximum risk of loss in VIEs in which we are not the primary beneficiary at March 31, 2019 is presented in the table below.

$ in thousands	Carrying Amount	Company's Maximum Risk of Loss
Non-Agency CMBS	3,455,806	3,455,806
Non-Agency RMBS	1,186,896	1,186,896
Investments in unconsolidated ventures	24,129	24,129
Total	4,666,831	4,666,831

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Mortgage-Backed and Credit Risk Transfer Securities (Tables)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Summary of Investment Portfolio

components of the carrying value of our MBS and GSE CRT portfolio at March 31, 2019 and December 31, 2018 are presented below.

	March 31, 2019
$ in thousands	MBS and GSE CRT Securities		Interest-Only Securities		Total
Principal/ notional balance	20,734,762		2,587,148		23,321,910
Unamortized premium	488,161		—		488,161
Unamortized discount	(545,248	)	(2,518,334	)	(3,063,582	)
Gross unrealized gains (1)	447,903		5,613		453,516
Gross unrealized losses (1)	(67,022	)	(5,385	)	(72,407	)
Fair value	21,058,556		69,042		21,127,598

	December 31, 2018
$ in thousands	MBS and GSE CRT Securities		Interest-Only Securities		Total
Principal/ notional balance	17,442,367		2,672,316		20,114,683
Unamortized premium	395,907		—		395,907
Unamortized discount	(549,988	)	(2,598,767	)	(3,148,755	)
Gross unrealized gains (1)	238,579		7,448		246,027
Gross unrealized losses (1)	(204,664	)	(6,556	)	(211,220	)
Fair value	17,322,201		74,441		17,396,642

(1) Gross unrealized gains and losses includes gains (losses) recognized in net income for securities accounted for as derivatives or under the fair value option as well as gains (losses) for available-for-sale securities which are recognized as adjustments to other comprehensive income. Realization occurs upon sale or settlement of such securities. Further detail on the components of our total gains (losses) on investments, net for the three months ended March 31, 2019 and 2018 is provided below within this Note 4.

The

The following tables summarize our mortgage-backed securities ("MBS") and GSE CRT portfolio by asset type as of March 31, 2019 and December 31, 2018.

March 31, 2019
$ in thousands	Principal/ Notional Balance	Unamortized Premium (Discount)		Amortized Cost	Unrealized Gain/ (Loss), net		Fair Value	Period- end Weighted Average Yield (1)
Agency RMBS:
15 year fixed-rate	343,116	2,595		345,711	6,391		352,102	3.34	%
30 year fixed-rate	12,264,517	386,145		12,650,662	65,974		12,716,636	3.66	%
ARM*	6,215	184		6,399	5		6,404	3.64	%
Hybrid ARM*	170,397	3,602		173,999	(478	)	173,521	3.11	%
Total Agency RMBS pass-through	12,784,245	392,526		13,176,771	71,892		13,248,663	3.64	%
Agency-CMO (2)	913,574	(585,878	)	327,696	(545	)	327,151	3.65	%
Agency CMBS	1,898,205	35,961		1,934,166	67,387		2,001,553	3.48	%
Non-Agency CMBS (3)	4,127,880	(737,241	)	3,390,639	65,167		3,455,806	5.08	%
Non-Agency RMBS (4)(5)(6)	2,774,428	(1,700,612	)	1,073,816	113,080		1,186,896	6.89	%
GSE CRT (7)	823,578	19,823		843,401	64,128		907,529	3.16	%
Total	23,321,910	(2,575,421	)	20,746,489	381,109		21,127,598	4.01	%

* Adjustable-rate mortgage ("ARM")

(1) Period-end weighted average yield is based on amortized cost as of March 31, 2019 and incorporates future prepayment and loss assumptions.

(2) Agency collateralized mortgage obligation ("Agency-CMO") includes interest-only securities ("Agency IO"), which represent 67.8% of principal/notional balance, 10.3% of amortized cost and 9.7% of fair value.

(3) Non-Agency CMBS includes interest-only securities which represent 14.6% of principal/notional balance, 0.4% of amortized cost and 0.4% of fair value.

(4) Non-Agency RMBS is 54.9% fixed rate, 39.7% variable rate, and 5.4% floating rate based on fair value. Coupon payments on variable rate investments are based upon changes in the underlying ARM and Hybrid ARM loan coupons, while coupon payments on floating rate investments are based upon a spread to a reference index.

(5) Of the total discount in non-Agency RMBS, $140.8 million is non-accretable calculated using the principal/notional balance and based on estimated future cash flows of the securities.

(6) Non-Agency RMBS includes interest-only securities ("non-Agency IO") which represent 54.6% of principal/notional balance, 2.2% of amortized cost and 2.1% of fair value.

(7) GSE CRT weighted average yield excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

December 31, 2018
$ in thousands	Principal/Notional Balance	Unamortized Premium (Discount)		Amortized Cost	Unrealized Gain/ (Loss), net		Fair Value	Period- end Weighted Average Yield (1)
Agency RMBS:
15 year fixed-rate	417,233	5,077		422,310	1,944		424,254	3.27	%
30 year fixed-rate	9,599,301	298,693		9,897,994	(125,225	)	9,772,769	3.55	%
ARM	105,453	350		105,803	(56	)	105,747	2.74	%
Hybrid ARM	548,133	13,425		561,558	(7,357	)	554,201	2.80	%
Total Agency RMBS pass-through	10,670,120	317,545		10,987,665	(130,694	)	10,856,971	3.49	%
Agency-CMO (2)	907,862	(631,180	)	276,682	(8,991	)	267,691	3.61	%
Agency CMBS	973,122	15,058		988,180	14,330		1,002,510	3.54	%
Non-Agency CMBS (3)	4,024,715	(727,307	)	3,297,408	(10,949	)	3,286,459	5.05	%
Non-Agency RMBS (4)(5)(6)	2,800,335	(1,748,223	)	1,052,112	111,570		1,163,682	7.24	%
GSE CRT (7)	738,529	21,259		759,788	59,541		819,329	3.10	%
Total	20,114,683	(2,752,848	)	17,361,835	34,807		17,396,642	4.00	%

(1) Period-end weighted average yield is based on amortized cost as of December 31, 2018 and incorporates future prepayment and loss assumptions.

(2) Agency collateralized mortgage obligation ("Agency-CMO") includes interest-only securities ("Agency IO"), which represent 73.6% of principal (notional) balance, 13.5%of amortized cost and 12.4% of fair value.

(3) Non-Agency CMBS includes interest-only securities which represent 15.0% of principal/notional balance, 0.4% of amortized cost and 0.5% of fair value.

(4) Non-Agency RMBS is 43.5% variable rate, 50.7% fixed rate, and 5.8% floating rate based on fair value. Coupon payments on variable rate investments are based upon changes in the underlying ARM and Hybrid ARM loan coupons, while coupon payments on floating rate investments are based upon a spread to a reference index.

(5) Of the total discount in non-Agency RMBS, $145.6 million is non-accretable calculated using the principal/notional balance andbased on estimated future cash flows of the securities.

(6) Non-Agency RMBS includes interest-only securities, which represent 55.4% of principal/notional balance, 2.3% of amortized cost and 2.4% of fair value.

(7) GSE CRT weighted average yield excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

Schedule of Fair Value of Available-for-sale Securities and Securities Accounted for under Fair Value Option by Asset Type

The following table presents the fair value of our available-for-sale securities and securities accounted for under the fair value option by asset type as of March 31, 2019 and December 31, 2018. We have elected the fair value option for all of our RMBS IOs, our MBS purchased on or after September 1, 2016 and our GSE CRTs purchased on or after August 24, 2015. As of March 31, 2019 and December 31, 2018, approximately 76% and 67%, respectively, of our MBS and GSE CRTs are accounted for under the fair value option.

	March 31, 2019			December 31, 2018
$ in thousands	Available-for-sale Securities	Securities under Fair Value Option	Total Fair Value	Available-for-sale Securities	Securities under Fair Value Option	Total Fair Value
Agency RMBS:
15 year fixed-rate	135,169	216,933	352,102	204,347	219,907	424,254
30 year fixed-rate	918,778	11,797,858	12,716,636	1,093,070	8,679,699	9,772,769
ARM	6,404	—	6,404	105,747	—	105,747
Hybrid ARM	141,320	32,201	173,521	521,199	33,002	554,201
Total RMBS Agency pass-through	1,201,671	12,046,992	13,248,663	1,924,363	8,932,608	10,856,971
Agency-CMO	166,730	160,421	327,151	168,385	99,306	267,691
Agency CMBS	—	2,001,553	2,001,553	—	1,002,510	1,002,510
Non-Agency CMBS	2,144,187	1,311,619	3,455,806	2,153,403	1,133,056	3,286,459
Non-Agency RMBS	916,158	270,738	1,186,896	961,445	202,237	1,163,682
GSE CRT	579,142	328,387	907,529	586,231	233,098	819,329
Total	5,007,888	16,119,710	21,127,598	5,793,827	11,602,815	17,396,642

Fair Value of Mortgage-Backed Securities and GSE CRT Portfolio According to Weighted Average Life Classification

The following table summarizes our MBS and GSE CRT portfolio according to estimated weighted average life classifications as of March 31, 2019 and December 31, 2018. 

$ in thousands	March 31, 2019	December 31, 2018
Less than one year	49,768	110,020
Greater than one year and less than five years	5,188,229	3,508,100
Greater than or equal to five years	15,889,601	13,778,522
Total	21,127,598	17,396,642

Unrealized Losses and Estimated Fair Value of MBS and GSE CRT by Length of Time

The following tables present the estimated fair value and gross unrealized losses of our MBS and GSE CRTs by length of time that such securities have been in a continuous unrealized loss position at March 31, 2019 and December 31, 2018.

March 31, 2019

	Less than 12 Months				12 Months or More				Total
$ in thousands	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities
Agency RMBS:
15 year fixed-rate	8,398	(28	)	21	35,070	(165	)	25	43,468	(193	)	46
30 year fixed-rate	1,286	(11	)	4	4,448,849	(50,925	)	146	4,450,135	(50,936	)	150
ARM	—	—		—	2,760	(60	)	2	2,760	(60	)	2
Hybrid ARM	3,059	(6	)	1	101,210	(1,595	)	24	104,269	(1,601	)	25
Total Agency RMBS pass-through (1)	12,743	(45	)	26	4,587,889	(52,745	)	197	4,600,632	(52,790	)	223
Agency-CMO (2)	9,749	(3,276	)	16	109,177	(3,380	)	20	118,926	(6,656	)	36
Non-Agency CMBS (3)	94,622	(538	)	9	478,174	(10,226	)	41	572,796	(10,764	)	50
GSE CRT (4)	62,965	(381	)	4	—	—		—	62,965	(381	)	4
Non-Agency RMBS (5)	63,102	(1,225	)	13	93,291	(591	)	15	156,393	(1,816	)	28
Total	243,181	(5,465	)	68	5,268,531	(66,942	)	273	5,511,712	(72,407	)	341

(1) Includes Agency RMBS with a fair value of $4.2 billion for which the fair value option has been elected. Such securities have unrealized losses of $47.0 million.

(2) Includes Agency IO and Agency-CMO with fair value of $13.9 million and $17.9 million, respectively, for which the fair value option has been elected. These Agency IO and Agency-CMO securities have unrealized losses of $4.6 million and $64,000, respectively.

(3) Includes non-Agency CMBS with a fair value of $323.9 million for which the fair value option has been elected. Such securities have unrealized losses of $3.1 million.

(4) Fair value option has been elected for all GSE CRT that are in an unrealized loss position.

(5) Includes non-Agency RMBS and non-Agency IO with a fair value of $6.1 million and $4.9 million, respectively for which the fair value option has been elected. Such securities have unrealized losses of $223,000 and $821,000, respectively.

December 31, 2018

	Less than 12 Months				12 Months or More				Total
$ in thousands	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities	Fair Value	Unrealized Losses		Number of Securities
Agency RMBS:
15 year fixed-rate	86,241	(814	)	50	16,660	(189	)	22	102,901	(1,003	)	72
30 year fixed-rate	3,966,347	(49,182	)	158	2,846,090	(94,716	)	95	6,812,437	(143,898	)	253
ARM	2,632	(28	)	1	49,954	(785	)	10	52,586	(813	)	11
Hybrid ARM	6,758	(59	)	2	453,463	(8,390	)	71	460,221	(8,449	)	73
Total Agency RMBS pass-through (1)	4,061,978	(50,083	)	211	3,366,167	(104,080	)	198	7,428,145	(154,163	)	409
Agency-CMO (2)	152,962	(6,315	)	34	101,705	(5,100	)	19	254,667	(11,415	)	53
Non-Agency CMBS (3)	1,214,691	(17,778	)	94	659,298	(25,381	)	52	1,873,989	(43,159	)	146
Non-Agency RMBS (4)	87,850	(1,152	)	19	89,265	(1,138	)	16	177,115	(2,290	)	35
GSE CRT(5)	9,639	(193	)	1	—	—		—	9,639	(193	)	1
Total	5,527,120	(75,521	)	359	4,216,435	(135,699	)	285	9,743,555	(211,220	)	644

(1) Includes Agency RMBS with a fair value of $6.1 billion for which the fair value option has been elected. Such securities have unrealized losses of $130.2 million.

(2) Includes Agency IO and Agency-CMO with fair value of $21.8 million and $66.0 million, respectively, for which the fair value option has been elected. These Agency IO and Agency-CMO securities have unrealized losses of $6.3 million and $845,000, respectively.

(3) Includes non-Agency CMBS with a fair value of $831.3 million for which the fair value option has been elected. Such securities have unrealized losses of $26.3 million.

(4) Includes non-Agency RMBS and non-Agency IO with a fair value of $6.2 million and $3.7 million for which the fair value option has been elected. Such securities have unrealized losses of $79,000 and $269,000, respectively.

(5) Fair value option has been elected for all GSE CRT that are in an unrealized loss position.

Changes in other than temporary impairment included in earnings

The following table summarizes OTTI included in earnings for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
$ in thousands	2019	2018
RMBS interest-only securities	1,463	4,309
Non-Agency RMBS (1)	313	50
Total	1,776	4,359

(1) Amounts disclosed relate to credit losses on debt securities for which a portion of an other-than-temporary impairment was recognized in other comprehensive income.

Realized Gain (Loss) on Investments

The following table summarizes the components of our total gain (loss) on investments, net for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019		2018
Gross realized gains on sale of investments	1,202		—
Gross realized losses on sale of investments	(12,317	)	(9,237	)
Other-than-temporary impairment losses	(1,776	)	(4,359	)
Net unrealized gains and losses on MBS accounted for under the fair value option	280,039		(147,195	)
Net unrealized gains and losses on GSE CRT accounted for under the fair value option	1,234		434
Net unrealized gains and losses on trading securities	—		(13	)
Total gain (loss) on investments, net	268,382		(160,370	)

Components of MBS and GSE CRT Interest Income

The following tables present components of interest income recognized on our MBS and GSE CRT portfolio for the three months ended March 31, 2019 and 2018. GSE CRT interest income excludes coupon interest associated with embedded derivatives not accounted for under the fair value option that is recorded as realized and unrealized credit derivative income (loss), net.

For the three months ended March 31, 2019

$ in thousands	Coupon Interest	Net (Premium Amortization)/Discount Accretion		Interest Income
Agency RMBS and Agency CMBS	130,197	(12,725	)	117,472
Non-Agency CMBS	38,830	3,031		41,861
Non-Agency RMBS	14,267	3,922		18,189
GSE CRT	8,596	(1,178	)	7,418
Other	552	—		552
Total	192,442	(6,950	)	185,492

For the three months ended March 31, 2018

$ in thousands	Coupon Interest	Net (Premium Amortization)/Discount Accretion		Interest Income
Agency RMBS and Agency CMBS	108,317	(23,222	)	85,095
Non-Agency CMBS	37,293	1,426		38,719
Non-Agency RMBS	14,012	5,177		19,189
GSE CRT	6,525	(697	)	5,828
Other	172	—		172
Total	166,319	(17,316	)	149,003

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Other Assets (Tables)

3 Months Ended

Mar. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Summary of Company's Other Assets

The following table summarizes our other assets as of March 31, 2019 and December 31, 2018.

$ in thousands	March 31, 2019	December 31, 2018
FHLBI stock	74,250	74,250
Loan participation interest	53,827	54,981
Commercial loans, held-for-investment	24,454	31,582
Investments in unconsolidated ventures	24,129	24,012
Prepaid expenses and other assets	1,253	1,234
Total	177,913	186,059

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Borrowings (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Borrowings

The following tables summarize certain characteristics of our borrowings at March 31, 2019 and December 31, 2018. Refer to Note 7 - "Collateral Positions" for collateral pledged under our repurchase agreements and secured loans.

$ in thousands	March 31, 2019
				Weighted
		Weighted		Average
		Average		Remaining
	Amount	Interest		Maturity
	Outstanding	Rate		(days)
Repurchase Agreements:
Agency RMBS	11,868,925	2.68	%	67
Agency CMBS	1,639,097	2.67	%	72
Non-Agency CMBS	1,642,106	3.57	%	18
Non-Agency RMBS	887,186	3.46	%	25
GSE CRT	746,703	3.49	%	20
Loan participation interest	40,370	4.09	%	515
Total Repurchase Agreements	16,824,387	2.85	%	59
Secured Loans	1,650,000	2.76	%	1862
Total Borrowings	18,474,387	2.84	%	220

$ in thousands	December 31, 2018
				Weighted
		Weighted		Average
		Average		Remaining
	Amount	Interest		Maturity
	Outstanding	Rate		(days)
Repurchase Agreements:
Agency RMBS	9,529,352	2.56	%	36
Agency CMBS	810,450	2.53	%	31
Non-Agency CMBS	1,616,473	3.56	%	19
Non-Agency RMBS	923,959	3.60	%	26
GSE CRT	681,014	3.48	%	21
Loan participation interest	41,236	4.09	%	605
Total Repurchase Agreements	13,602,484	2.80	%	34
Secured Loans	1,650,000	2.68	%	1952
Total Borrowings	15,252,484	2.79	%	242

Schedule of Maturities of Outstanding Borrowings

The following table shows the aggregate amount of maturities of our outstanding borrowings:

$ in thousands	As of
Borrowings maturing within:	March 31, 2019
4/1/2019 - 3/31/2020	17,084,017
4/1/2020 - 3/31/2021	140,370
4/1/2021 - 3/31/2022	—
4/1/2022 - 3/31/2023	—
4/1/2023 - 3/31/2024	—
Thereafter	1,250,000
Total	18,474,387

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Collateral Positions (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value of Collateral Hold and Pledged

The following table summarizes the fair value of collateral that we have pledged and held under our repurchase agreements, secured loans, interest rate swaps, futures contracts and currency forward contracts as of March 31, 2019 and December 31, 2018. Refer to Note 2 - "Summary of Significant Accounting Policies - Fair Value Measurements" of our consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 for a description of how we determine fair value. RMBS, CMBS and GSE CRT collateral pledged is included in mortgage-backed and credit risk transfer securities on our condensed consolidated balance sheets. Loan participation interest collateral pledged is included in other assets on our condensed consolidated balance sheets. Cash collateral pledged on secured loans, centrally cleared swaps, bilateral interest rate swaps and currency forward contracts is classified as restricted cash on our condensed consolidated balance sheets. Cash collateral pledged on futures contracts is classified as due from counterparties on our condensed consolidated balance sheets.

Cash collateral held on bilateral swaps that is not restricted for use is included in cash and cash equivalents on our condensed consolidated balance sheets and the liability to return the collateral is included in collateral held payable. Non-cash collateral held is only recognized if the counterparty defaults or if we sell the pledged collateral. As of March 31, 2019 and December 31, 2018, we did not recognize any non-cash collateral held.

$ in thousands	As of
Collateral Pledged	March 31, 2019	December 31, 2018
Repurchase Agreements:
Agency RMBS	12,575,947	10,158,404
Agency CMBS	1,763,779	870,702
Non-Agency CMBS	2,072,829	2,016,202
Non-Agency RMBS	1,079,223	1,127,911
GSE CRT	907,529	819,328
Loan participation interest	53,827	54,981
Total repurchase agreements collateral pledged	18,453,134	15,047,528
Secured Loans:
Agency RMBS	686,656	702,952
Non-Agency CMBS	1,260,396	1,227,412
Total secured loans collateral pledged	1,947,052	1,930,364
Interest Rate Swaps, Futures Contracts and Currency Forward Contracts:
Agency RMBS	197,958	159,914
Cash (1)	18,025	13,500
Total interest rate swaps, futures contracts and currency forward contracts collateral pledged	215,983	173,414
Total collateral pledged:
Mortgage-backed and credit risk transfer securities	20,544,317	17,082,825
Loan participation interest	53,827	54,981
Cash	18,025	13,500
Total collateral pledged	20,616,169	17,151,306
	As of
Collateral Held	March 31, 2019	December 31, 2018
Interest Rate Swaps:
Cash	2,273	18,083
Non-cash collateral	—	—
Total collateral held	2,273	18,083

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Derivatives and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Outstanding Interest Rate Swaptions and Derivative Instrument Information

The following table summarizes changes in the notional amount of our derivative instruments during 2019:

$ in thousands	Notional Amount as of December 31, 2018	Additions	Settlement, Termination, Expiration or Exercise		Notional Amount as of March 31, 2019
Interest Rate Swaps	12,370,000	4,575,000	(4,050,000	)	12,895,000
Futures Contracts	1,689,900	1,586,400	(1,689,900	)	1,586,400
Currency Forward Contracts	23,149	25,534	(23,149	)	25,534
Credit Derivatives	526,912	—	(9,378	)	517,534
Total	14,609,961	6,186,934	(5,772,427	)	15,024,468

Schedule of Interest Rate Swaps Outstanding

As of March 31, 2019 and December 31, 2018, we had the following interest rate swaps outstanding:

$ in thousands	As of March 31, 2019
Maturities	Notional Amount(1)	Weighted Average Fixed Pay Rate		Weighted Average Receive Rate		Weighted Average Years to Maturity
2020	1,000,000	2.72	%	2.50	%	1.4
2021	2,800,000	2.49	%	2.54	%	2.2
2022	2,550,000	2.13	%	2.61	%	3.2
2023	1,500,000	2.21	%	2.48	%	4.3
2024	1,600,000	2.27	%	2.65	%	4.8
Thereafter	3,445,000	2.46	%	2.52	%	7.8
Total	12,895,000	2.37	%	2.55	%	4.4

$ in thousands	As of December 31, 2018
Maturities	Notional Amount(2)	Weighted Average Fixed Pay Rate		Weighted Average Receive Rate		Weighted Average Years to Maturity
2019	1,500,000	2.70	%	2.47	%	0.9
2020	1,500,000	2.78	%	2.51	%	1.7
2021	2,300,000	2.51	%	2.58	%	2.5
2022	2,550,000	2.13	%	2.65	%	3.4
2023	1,600,000	2.39	%	2.47	%	4.7
Thereafter	2,920,000	2.47	%	2.55	%	6.8
Total	12,370,000	2.46	%	2.55	%	3.7

(1) Notional amount includes $8.4 billion of interest rate swaps that receive variable payments based on 1-month LIBOR and $4.5 billion of interest rate swaps that receive variable payments based on 3-month LIBOR as of March 31, 2019.

(2) Notional amount includes $6.7 billion of interest rate swaps that receive variable payments based on 1-month LIBOR and $5.7 billion of interest rate swaps that receive variable payments based on 3-month LIBOR as of December 31, 2018.

Disclosure of Credit Derivatives

At March 31, 2019 and December 31, 2018, terms of the GSE CRT embedded derivatives are:

$ in thousands	March 31, 2019	December 31, 2018
Fair value amount	25,305	22,771
Notional amount	517,534	526,912
Maximum potential amount of future undiscounted payments	517,534	526,912

Fair Value of Derivative Financial Instruments and Classification on Balance Sheet

The table below presents the fair value of our derivative financial instruments, as well as their classification on the condensed consolidated balance sheets as of March 31, 2019 and December 31, 2018.

$ in thousands

Derivative Assets			Derivative Liabilities
	As of March 31, 2019	As of December 31, 2018		As of March 31, 2019	As of December 31, 2018
Balance Sheet	Fair Value	Fair Value	Balance Sheet	Fair Value	Fair Value
Interest Rate Swaps Asset	21,161	15,089	Interest Rate Swaps Liability	8,463	15,382
Currency Forward Contracts	311	—	Currency Forward Contracts	—	172
Futures Contracts	5,108	—	Futures Contracts	—	7,836

Effect of Derivative Financial Instruments on Statement of Operations

The tables below present the effect of our credit derivatives on the condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018.

$ in thousands	Three months ended March 31, 2019
Derivative not designated as hedging instrument	Realized gain (loss), net	GSE CRT embedded derivative coupon interest	Unrealized gain (loss), net	Realized and unrealized credit derivative income (loss), net
GSE CRT Embedded Derivatives	—	5,350	2,534	7,884

$ in thousands	Three months ended March 31, 2018
Derivative not designated as hedging instrument	Realized gain (loss), net	GSE CRT embedded derivative coupon interest	Unrealized gain (loss), net		Realized and unrealized credit derivative income (loss), net
GSE CRT Embedded Derivatives	—	5,633	(2,468	)	3,165

The following table summarizes the effect of interest rate swaps, futures contracts and currency forward contracts reported in gain (loss) on derivative instruments, net on the condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018:

$ in thousands	Three Months Ended March 31, 2019
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)	Unrealized gain (loss), net	Gain (loss) on derivative instruments, net
Interest Rate Swaps	(165,884	)	4,509	12,991	(148,384	)
Futures Contracts	(66,688	)	—	12,944	(53,744	)
Currency Forward Contracts	185		—	483	668
Total	(232,387	)	4,509	26,418	(201,460	)

$ in thousands	Three Months Ended March 31, 2018
Derivative not designated as hedging instrument	Realized gain (loss) on derivative instruments, net		Contractual net interest income (expense)		Unrealized gain (loss), net		Gain (loss) on derivative instruments, net
Interest Rate Swaps	122,273		(12,112	)	32,374		142,535
Futures Contracts	(5,277	)	—		(1,612	)	(6,889	)
Currency Forward Contracts	(3,418	)	—		1,139		(2,279	)
Total	113,578		(12,112	)	31,901		133,367

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Offsetting Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Offsetting [Abstract]

Offsetting Derivative Assets

The following tables present information about the assets and liabilities that are subject to master netting agreements (or similar agreements) and can potentially be offset on our condensed consolidated balance sheets at March 31, 2019 and December 31, 2018. The daily variation margin payment for centrally cleared interest rate swaps is characterized as settlement of the derivative itself rather than collateral. As of March 31, 2019, our derivative asset of $17.8 million (December 31, 2018: derivative liability of $13.2 million) related to centrally cleared interest rate swaps is not included in the table below as a result of this characterization of daily variation margin.

Offsetting of Derivative Assets

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments	Cash Collateral Received		Net Amount
Derivatives (1) (3)	8,742	—	8,742	—	(2,201	)	6,541

Offsetting of Derivative Liabilities, Repurchase Agreements and Secured Loans

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged	Net Amount
Derivatives (3)	8,463	—	8,463	(8,463	)	—	—
Repurchase Agreements (4)	16,824,387	—	16,824,387	(16,824,387	)	—	—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—	—
Total	18,482,850	—	18,482,850	(18,482,850	)	—	—

Offsetting of Derivative Assets

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments		Cash Collateral Received		Net Amount
Derivatives (1) (3)	15,089	—	15,089	(433	)	(14,656	)	—

Offsetting of Derivative Liabilities and Repurchase Agreements

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged		Net Amount
Derivatives (3)	10,239	—	10,239	(2,058	)	(7,836	)	345
Repurchase Agreements (4)	13,602,484	—	13,602,484	(13,602,484	)	—		—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—		—
Total	15,262,723	—	15,262,723	(15,254,542	)	(7,836	)	345

(1) Amounts represent derivatives in an asset position which could potentially be offset against derivatives in a liability position at March 31, 2019 and December 31, 2018, subject to a netting arrangement.

(2) Amounts represent collateral pledged that is available to be offset against liability balances associated with repurchase agreements, secured loans and derivatives.

(3) The fair value of securities pledged against our derivatives was $198.0 million (December 31, 2018: $159.9 million) at March 31, 2019, of which $164.8 million (December 31, 2018: $158.3 million) relates to initial margin pledged on centrally cleared interest rate swaps. Centrally cleared interest rate swaps are excluded from the tables above. Cash collateral received on our derivatives was $2.3 million and $18.1 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged by us on our futures contracts and interest rate swaps were $18.0 million and $13.5 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged on our centrally cleared interest rate swaps is settled against the fair value of these swaps and therefore excluded from the tables above at March 31, 2019 and December 31, 2018, respectively.

(4) The fair value of securities pledged against our borrowing under repurchase agreements was $18.5 billion and $15.0 billion at March 31, 2019 and December 31, 2018, respectively.

(5) The fair value of securities pledged against IAS Services LLC's borrowings under secured loans was $1.9 billion at March 31, 2019 and December 31, 2018, respectively.

Offsetting Derivative Liabilities

The following tables present information about the assets and liabilities that are subject to master netting agreements (or similar agreements) and can potentially be offset on our condensed consolidated balance sheets at March 31, 2019 and December 31, 2018. The daily variation margin payment for centrally cleared interest rate swaps is characterized as settlement of the derivative itself rather than collateral. As of March 31, 2019, our derivative asset of $17.8 million (December 31, 2018: derivative liability of $13.2 million) related to centrally cleared interest rate swaps is not included in the table below as a result of this characterization of daily variation margin.

Offsetting of Derivative Assets

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments	Cash Collateral Received		Net Amount
Derivatives (1) (3)	8,742	—	8,742	—	(2,201	)	6,541

Offsetting of Derivative Liabilities, Repurchase Agreements and Secured Loans

As of March 31, 2019

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged	Net Amount
Derivatives (3)	8,463	—	8,463	(8,463	)	—	—
Repurchase Agreements (4)	16,824,387	—	16,824,387	(16,824,387	)	—	—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—	—
Total	18,482,850	—	18,482,850	(18,482,850	)	—	—

Offsetting of Derivative Assets

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Assets	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	Financial Instruments		Cash Collateral Received		Net Amount
Derivatives (1) (3)	15,089	—	15,089	(433	)	(14,656	)	—

Offsetting of Derivative Liabilities and Repurchase Agreements

As of December 31, 2018

				Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets
$ in thousands Description	Gross Amounts of Recognized Liabilities	Gross Amounts Offset in the Condensed Consolidated Balance Sheets	Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	Financial Instruments (2)		Cash Collateral Pledged		Net Amount
Derivatives (3)	10,239	—	10,239	(2,058	)	(7,836	)	345
Repurchase Agreements (4)	13,602,484	—	13,602,484	(13,602,484	)	—		—
Secured Loans (5)	1,650,000	—	1,650,000	(1,650,000	)	—		—
Total	15,262,723	—	15,262,723	(15,254,542	)	(7,836	)	345

(1) Amounts represent derivatives in an asset position which could potentially be offset against derivatives in a liability position at March 31, 2019 and December 31, 2018, subject to a netting arrangement.

(2) Amounts represent collateral pledged that is available to be offset against liability balances associated with repurchase agreements, secured loans and derivatives.

(3) The fair value of securities pledged against our derivatives was $198.0 million (December 31, 2018: $159.9 million) at March 31, 2019, of which $164.8 million (December 31, 2018: $158.3 million) relates to initial margin pledged on centrally cleared interest rate swaps. Centrally cleared interest rate swaps are excluded from the tables above. Cash collateral received on our derivatives was $2.3 million and $18.1 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged by us on our futures contracts and interest rate swaps were $18.0 million and $13.5 million at March 31, 2019 and December 31, 2018, respectively. Cash collateral pledged on our centrally cleared interest rate swaps is settled against the fair value of these swaps and therefore excluded from the tables above at March 31, 2019 and December 31, 2018, respectively.

(4) The fair value of securities pledged against our borrowing under repurchase agreements was $18.5 billion and $15.0 billion at March 31, 2019 and December 31, 2018, respectively.

(5) The fair value of securities pledged against IAS Services LLC's borrowings under secured loans was $1.9 billion at March 31, 2019 and December 31, 2018, respectively.

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Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measured on Recurring Basis

The following tables present our assets and liabilities measured at fair value on a recurring basis.

	March 31, 2019
	Fair Value Measurements Using:
$ in thousands	Level 1	Level 2	Level 3	NAV as a practical expedient (3)	Total at Fair Value
Assets:
Mortgage-backed and credit risk transfer securities (1)(2)	—	21,102,293	25,305	—	21,127,598
Derivative assets	5,108	21,472	—	—	26,580
Other assets (4)	—	—	53,827	24,129	77,956
Total assets	5,108	21,123,765	79,132	24,129	21,232,134
Liabilities:
Derivative liabilities	—	8,463	—	—	8,463
Total liabilities	—	8,463	—	—	8,463

	December 31, 2018
	Fair Value Measurements Using:
$ in thousands	Level 1	Level 2	Level 3	NAV as a practical expedient (3)	Total at Fair Value
Assets:
Mortgage-backed and credit risk transfer securities (1)(2)	—	17,373,871	22,771	—	17,396,642
Derivative assets	—	15,089	—	—	15,089
Other assets (4)	—	—	54,981	24,012	78,993
Total assets	—	17,388,960	77,752	24,012	17,490,724
Liabilities:
Derivative liabilities	7,836	15,554	—	—	23,390
Total liabilities	7,836	15,554	—	—	23,390

(1) For more detail about the fair value of our MBS and GSE CRTs, refer to Note 4 - "Mortgage-Backed and Credit Risk Transfer Securities."

(2) Our GSE CRTs purchased prior to August 24, 2015 are accounted for as hybrid financial instruments with an embedded derivative. The hybrid financial instruments consist of debt host contracts classified as Level 2 and embedded derivatives classified as Level 3. As of March 31, 2019, the net embedded derivative asset position of $25.3 million includes $30.2 million of embedded derivatives in an asset position and $4.9 million of embedded derivatives in a liability position. As of December 31, 2018, the net embedded derivative asset position of $22.8 million includes $28.8 million of embedded derivatives in an asset position and $6.0 million of embedded derivatives in a liability position.

(3) Investments in unconsolidated ventures are valued using the net asset value ("NAV") as a practical expedient and are not subject to redemption, although investors may sell or transfer their interest at the approval of the general partner of the underlying funds. As of March 31, 2019 and December 31, 2018, the weighted average remaining term of our investments in unconsolidated ventures is 2.8 and 2.6 years, respectively.

(4) Includes $53.8 million and $55.0 million of a loan participation interest as of March 31, 2019 and December 31, 2018, respectively. The loan participation interest is transferable and bears interest at a variable rate based on LIBOR plus a spread and resets daily. As a result, the cost of the loan participation interest approximates its fair value.

Embedded Derivatives Level 3 Roll Forward

The following table shows a reconciliation of the beginning and ending fair value measurements of our GSE CRT embedded derivatives, which we have valued utilizing Level 3 inputs:

	Three Months Ended March 31,
$ in thousands	2019	2018
Beginning balance	22,771	45,400
Unrealized credit derivative gains (losses), net	2,534	(2,468	)
Ending balance	25,305	42,932

Loan participation interest Level 3 Roll Forward

The following table shows a reconciliation of the beginning and ending fair value measurements of our loan participation interest, which we have valued utilizing Level 3 inputs:

	Three Months Ended March 31,
$ in thousands	2019
Beginning balance	54,981
Advances	577
Repayments	(1,731	)
Ending balance	53,827

Embedded Derivatives Fair Value Inputs

The following tables summarize significant unobservable inputs used in the fair value measurement of our GSE CRT embedded derivatives:

	Fair Value at	Valuation	Unobservable		Weighted
$ in thousands	March 31, 2019	Technique	Input	Range	Average
GSE CRT Embedded Derivatives	25,305	Market Comparables, Vendor Pricing	Weighted average life	2.5 - 5.6 years	4.0 years

	Fair Value at	Valuation	Unobservable		Weighted
$ in thousands	December 31, 2018	Technique	Input	Range	Average
GSE CRT Embedded Derivatives	22,771	Market Comparables, Vendor Pricing	Weighted average life	2.9 - 5.9 years	4.3 years

Carrying Value and Estimated Fair Value of Financial Instruments

The following table presents the carrying value and estimated fair value of our financial instruments that are not carried at fair value on the condensed consolidated balance sheets at March 31, 2019 and December 31, 2018:

	March 31, 2019		December 31, 2018
$ in thousands	Carrying Value	Estimated Fair Value	Carrying Value	Estimated Fair Value
Financial Assets
Commercial loans, held-for-investment	24,454	24,732	31,582	31,826
FHLBI stock	74,250	74,250	74,250	74,250
Total	98,704	98,982	105,832	106,076
Financial Liabilities
Repurchase agreements	16,824,387	16,825,642	13,602,484	13,602,050
Secured loans	1,650,000	1,650,000	1,650,000	1,650,000
Total	18,474,387	18,475,642	15,252,484	15,252,050

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Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2019

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

The following table summarizes the costs incurred on our behalf by our Manager for the three months ended March 31, 2019 and 2018.

	Three Months Ended March 31,
$ in thousands	2019	2018
Incurred costs, prepaid or expensed	1,604	1,492
Incurred costs, charged against equity as a cost of raising capital	320	165
Total incurred costs, originally paid by our Manager	1,924	1,657

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Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes the activity related to restricted stock units awarded to employees of our Manager and its affiliates for the three months ended March 31, 2019.

	Three Months Ended March 31,
	2019
	Restricted Stock Units		Weighted Average Grant Date Fair Value (1)
Unvested at the beginning of the period	11,051		$	14.55
Shares granted during the period	6,189		15.92
Shares vested during the period	(4,720	)	14.48
Unvested at the end of the period	12,520		$	15.25

(1) The grant date fair value of restricted stock awards is based on the closing market price of our common stock at the grant date.

Schedule of accumulated other comprehensive income

The tables exclude gains and losses on MBS and GSE CRTs that are accounted for under the fair value option.

	Three Months Ended March 31, 2019
$ in thousands	Equity method investments		Available-for-sale securities	Derivatives and hedging		Total
Total other comprehensive income (loss)
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	—		52,349	—		52,349
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	—		10,147	—		10,147
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	—		—	(5,851	)	(5,851	)
Currency translation adjustments on investment in unconsolidated venture	(276	)	—	—		(276	)
Total other comprehensive income (loss)	(276	)	62,496	(5,851	)	56,369
AOCI balance at beginning of period	513		120,664	99,636		220,813
Total other comprehensive income (loss)	(276	)	62,496	(5,851	)	56,369
AOCI balance at end of period	237		183,160	93,785		277,182

	Three Months Ended March 31, 2018
$ in thousands	Equity method investments		Available-for-sale securities		Derivatives and hedging		Total
Total other comprehensive income (loss)
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	—		(132,317	)	—		(132,317	)
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	—		9,237		—		9,237
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	—		—		(6,539	)	(6,539	)
Currency translation adjustments on investment in unconsolidated venture	312		—		—		312
Total other comprehensive income (loss)	312		(123,080	)	(6,539	)	(129,307	)
AOCI balance at beginning of period	947		136,188		123,894		261,029
Total other comprehensive income (loss)	312		(123,080	)	(6,539	)	(129,307	)
Other comprehensive income/(loss) attributable to non-controlling interest	(4	)	1,552		82		1,630
AOCI balance at end of period	1,255		14,660		117,437		133,352

Dividends Declared

We declared the following dividends during the three months ended March 31, 2019 and 2018:

$ in thousands, except per share amounts	Dividends Declared
Series A Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
March 18, 2019	0.4844	2,713	April 25, 2019
2018
March 15, 2018	0.4844	2,713	April 25, 2018

$ in thousands, except per share amounts	Dividends Declared
Series B Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
February 14, 2019	0.4844	3,003	March 27, 2019
2018
February 15, 2018	0.4844	3,003	March 27, 2018

$ in thousands, except per share amounts	Dividends Declared
Series C Preferred Stock	Per Share	In Aggregate	Date of Payment
2019
February 14, 2019	0.46875	5,391	March 27, 2019
2018
February 15, 2018	0.46875	5,391	March 27, 2018

$ in thousands, except per share amounts	Dividends Declared
Common Stock	Per Share	In Aggregate	Date of Payment
2019
March 18, 2019	0.45	57,720	April 26, 2019
2018
March 15, 2018	0.42	46,887	April 26, 2018

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Earnings per Common Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per share for the three months ended March 31, 2019 and 2018 is computed as follows:

	Three Months Ended March 31,
In thousands except per share amounts	2019	2018
Numerator (Income)
Basic Earnings:
Net income available to common stockholders	127,683	41,471
Effect of dilutive securities:
Income allocated to exchangeable senior notes	—	1,621
Income allocated to non-controlling interest	—	671
Dilutive net income available to stockholders	127,683	43,763
Denominator (Weighted Average Shares)
Basic Earnings:
Shares available to common stockholders	121,098	111,629
Effect of dilutive securities:
Restricted stock awards	12	20
Non-controlling interest OP units	—	1,425
Exchangeable senior notes	—	4,803
Dilutive Shares	121,110	117,877
Earnings per share:
Net income attributable to common stockholders
Basic	1.05	0.37
Diluted	1.05	0.37

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Organization and Business Operations (Detail)	3 Months Ended
	Mar. 31, 2019 segment
Organization And Business Operations
Number of operating segments	1
Minimum distribution percentage of taxable income to qualify for REIT	90.00%
Invesco Investments (Bermuda) Ltd
Organization And Business Operations
Ownership percentage in operating partnership	1.30%

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Variable Interest Entities ("VIEs") (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity
Carrying Amount	$ 21,127,598	$ 17,396,642
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
Carrying Amount	4,666,831
Company's Maximum Risk of Loss	4,666,831
Variable Interest Entity, Not Primary Beneficiary | Non-Agency CMBS
Variable Interest Entity
Carrying Amount	3,455,806
Company's Maximum Risk of Loss	3,455,806
Variable Interest Entity, Not Primary Beneficiary | Non-Agency RMBS
Variable Interest Entity
Carrying Amount	1,186,896
Company's Maximum Risk of Loss	1,186,896
Variable Interest Entity, Not Primary Beneficiary | Investments in unconsolidated ventures
Variable Interest Entity
Carrying Amount	24,129
Company's Maximum Risk of Loss	$ 24,129

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Mortgage-Backed and Credit Risk Transfer Securities - Summary of Investment Portfolio (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 23,321,910	$ 20,114,683
Unamortized Premium (Discount)	(2,575,421)	(2,752,848)
Amortized Cost	20,746,489	17,361,835
Unrealized Gain/ (Loss), net	381,109	34,807
Fair value	$ 21,127,598	$ 17,396,642
Period- end Weighted Average Yield	4.01%	4.00%
Percentage of agency collateralized mortgage obligations interest only securities, principal balance	67.80%	73.60%
Percentage of agency collateralized mortgage obligations interest only securities, amortized cost	10.30%	13.50%
Percentage of agency collateralized mortgage obligations interest only securities, fair value	9.70%	12.40%
Percentage of CMBS interest only, principal balance	14.60%	15.00%
Percentage of CMBS interest only, amortized cost	0.40%	0.40%
Percentage of CMBS interest only, fair value	0.40%	0.50%
Unamortized premium (discount) non-accretable portion	$ 140,800	$ 145,600
Percentage of Non-Agency RMBS interest-only, principal balance	54.60%	55.40%
Percentage of Non-Agency RMBS interest-only, amortized cost	2.20%	2.30%
Percentage of Non-Agency RMBS interest only, fair value	2.10%	2.40%
15 year fixed-rate
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 343,116	$ 417,233
Unamortized Premium (Discount)	2,595	5,077
Amortized Cost	345,711	422,310
Unrealized Gain/ (Loss), net	6,391	1,944
Fair value	$ 352,102	$ 424,254
Period- end Weighted Average Yield	3.34%	3.27%
30 year fixed-rate
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 12,264,517	$ 9,599,301
Unamortized Premium (Discount)	386,145	298,693
Amortized Cost	12,650,662	9,897,994
Unrealized Gain/ (Loss), net	65,974	(125,225)
Fair value	$ 12,716,636	$ 9,772,769
Period- end Weighted Average Yield	3.66%	3.55%
ARM
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 6,215	$ 105,453
Unamortized Premium (Discount)	184	350
Amortized Cost	6,399	105,803
Unrealized Gain/ (Loss), net	5	(56)
Fair value	$ 6,404	$ 105,747
Period- end Weighted Average Yield	3.64%	2.74%
Hybrid ARM
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 170,397	$ 548,133
Unamortized Premium (Discount)	3,602	13,425
Amortized Cost	173,999	561,558
Unrealized Gain/ (Loss), net	(478)	(7,357)
Fair value	$ 173,521	$ 554,201
Period- end Weighted Average Yield	3.11%	2.80%
Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 12,784,245	$ 10,670,120
Unamortized Premium (Discount)	392,526	317,545
Amortized Cost	13,176,771	10,987,665
Unrealized Gain/ (Loss), net	71,892	(130,694)
Fair value	$ 13,248,663	$ 10,856,971
Period- end Weighted Average Yield	3.64%	3.49%
Agency-CMO
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 913,574	$ 907,862
Unamortized Premium (Discount)	(585,878)	(631,180)
Amortized Cost	327,696	276,682
Unrealized Gain/ (Loss), net	(545)	(8,991)
Fair value	$ 327,151	$ 267,691
Period- end Weighted Average Yield	3.65%	3.61%
Agency CMBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 1,898,205	$ 973,122
Unamortized Premium (Discount)	35,961	15,058
Amortized Cost	1,934,166	988,180
Unrealized Gain/ (Loss), net	67,387	14,330
Fair value	$ 2,001,553	$ 1,002,510
Period- end Weighted Average Yield	3.48%	3.54%
Non-Agency CMBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 4,127,880	$ 4,024,715
Unamortized Premium (Discount)	(737,241)	(727,307)
Amortized Cost	3,390,639	3,297,408
Unrealized Gain/ (Loss), net	65,167	(10,949)
Fair value	$ 3,455,806	$ 3,286,459
Period- end Weighted Average Yield	5.08%	5.05%
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 2,774,428	$ 2,800,335
Unamortized Premium (Discount)	(1,700,612)	(1,748,223)
Amortized Cost	1,073,816	1,052,112
Unrealized Gain/ (Loss), net	113,080	111,570
Fair value	$ 1,186,896	$ 1,163,682
Period- end Weighted Average Yield	6.89%	7.24%
Percentage of non-agency securities classified as variable rate	39.70%	43.50%
Percentage of non-agency securities classified as fixed rate	54.90%	50.70%
Percentage of non-agency securities classified as floating rate	5.40%	5.80%
GSE CRT
Debt Securities, Available-for-sale [Line Items]
Principal/ Notional Balance	$ 823,578	$ 738,529
Unamortized Premium (Discount)	19,823	21,259
Amortized Cost	843,401	759,788
Unrealized Gain/ (Loss), net	64,128	59,541
Fair value	$ 907,529	$ 819,329
Period- end Weighted Average Yield	3.16%	3.10%

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Mortgage-Backed and Credit Risk Transfer Securities - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Percentage of MBS and GSE CRT are accounted for under the fair value option	76.00%	67.00%
Gross unrealized losses	$ 72,407	$ 211,220
Agency RMBS, Agency CMBS and CMO
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses	55,300	159,300
Agency IO, non-Agency RMBS and non-Agency CMBS
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses	$ 17,100	$ 51,900

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Mortgage-Backed and Credit Risk Transfer Securities - Schedule of Fair Value of Available-for-sale Securities and Securities Accounted for under Fair Value Option by Asset Type (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	$ 5,007,888	$ 5,793,827
Securities under Fair Value Option	16,119,710	11,602,815
Marketable Securities	21,127,598	17,396,642
15 year fixed-rate
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	135,169	204,347
Securities under Fair Value Option	216,933	219,907
Marketable Securities	352,102	424,254
30 year fixed-rate
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	918,778	1,093,070
Securities under Fair Value Option	11,797,858	8,679,699
Marketable Securities	12,716,636	9,772,769
ARM
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	6,404	105,747
Securities under Fair Value Option	0	0
Marketable Securities	6,404	105,747
Hybrid ARM
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	141,320	521,199
Securities under Fair Value Option	32,201	33,002
Marketable Securities	173,521	554,201
Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	1,201,671	1,924,363
Securities under Fair Value Option	12,046,992	8,932,608
Marketable Securities	13,248,663	10,856,971
Agency-CMO
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	166,730	168,385
Securities under Fair Value Option	160,421	99,306
Marketable Securities	327,151	267,691
Agency CMBS
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	0	0
Securities under Fair Value Option	2,001,553	1,002,510
Marketable Securities	2,001,553	1,002,510
Non-Agency CMBS
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	2,144,187	2,153,403
Securities under Fair Value Option	1,311,619	1,133,056
Marketable Securities	3,455,806	3,286,459
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	916,158	961,445
Securities under Fair Value Option	270,738	202,237
Marketable Securities	1,186,896	1,163,682
GSE CRT
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	579,142	586,231
Securities under Fair Value Option	328,387	233,098
Marketable Securities	$ 907,529	$ 819,329

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Mortgage-Backed and Credit Risk Transfer Securities - Components of Carrying Value of MBS and GSE CRT Portfolio (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Principal/ notional balance	$ 23,321,910	$ 20,114,683
Unamortized premium	488,161	395,907
Unamortized discount	(3,063,582)	(3,148,755)
Gross unrealized gains	453,516	246,027
Gross unrealized losses	(72,407)	(211,220)
Fair value	21,127,598	17,396,642
MBS and GSE CRT Securities
Debt Securities, Available-for-sale [Line Items]
Principal/ notional balance	20,734,762	17,442,367
Unamortized premium	488,161	395,907
Unamortized discount	(545,248)	(549,988)
Gross unrealized gains	447,903	238,579
Gross unrealized losses	(67,022)	(204,664)
Fair value	21,058,556	17,322,201
Interest-Only Securities
Debt Securities, Available-for-sale [Line Items]
Principal/ notional balance	2,587,148	2,672,316
Unamortized premium	0	0
Unamortized discount	(2,518,334)	(2,598,767)
Gross unrealized gains	5,613	7,448
Gross unrealized losses	(5,385)	(6,556)
Fair value	$ 69,042	$ 74,441

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Mortgage-Backed and Credit Risk Transfer Securities - Fair Value of Mortgage-Backed Securities According to Weighted Average Life Classification (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Less than one year	$ 49,768	$ 110,020
Greater than one year and less than five years	5,188,229	3,508,100
Greater than or equal to five years	15,889,601	13,778,522
Fair value	$ 21,127,598	$ 17,396,642

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Mortgage-Backed and Credit Risk Transfer Securities - Unrealized Losses and Estimated Fair Value of MBS and GSE CRT by Length of Time (Detail) $ in Thousands	Mar. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
Fair Value
Less than 12 Months	$ 243,181	$ 5,527,120
12 Months or More	5,268,531	4,216,435
Total	5,511,712	9,743,555
Unrealized Losses
Less than 12 Months	(5,465)	(75,521)
12 Months or More	(66,942)	(135,699)
Total	$ (72,407)	$ (211,220)
Number of Securities
Less than 12 Months (in securities) | security	68	359
12 Months or More (in securities) | security	273	285
Total (in securities) | security	341	644
15 year fixed-rate
Fair Value
Less than 12 Months	$ 8,398	$ 86,241
12 Months or More	35,070	16,660
Total	43,468	102,901
Unrealized Losses
Less than 12 Months	(28)	(814)
12 Months or More	(165)	(189)
Total	$ (193)	$ (1,003)
Number of Securities
Less than 12 Months (in securities) | security	21	50
12 Months or More (in securities) | security	25	22
Total (in securities) | security	46	72
30 year fixed-rate
Fair Value
Less than 12 Months	$ 1,286	$ 3,966,347
12 Months or More	4,448,849	2,846,090
Total	4,450,135	6,812,437
Unrealized Losses
Less than 12 Months	(11)	(49,182)
12 Months or More	(50,925)	(94,716)
Total	$ (50,936)	$ (143,898)
Number of Securities
Less than 12 Months (in securities) | security	4	158
12 Months or More (in securities) | security	146	95
Total (in securities) | security	150	253
ARM
Fair Value
Less than 12 Months	$ 0	$ 2,632
12 Months or More	2,760	49,954
Total	2,760	52,586
Unrealized Losses
Less than 12 Months	0	(28)
12 Months or More	(60)	(785)
Total	$ (60)	$ (813)
Number of Securities
Less than 12 Months (in securities) | security	0	1
12 Months or More (in securities) | security	2	10
Total (in securities) | security	2	11
Hybrid ARM
Fair Value
Less than 12 Months	$ 3,059	$ 6,758
12 Months or More	101,210	453,463
Total	104,269	460,221
Unrealized Losses
Less than 12 Months	(6)	(59)
12 Months or More	(1,595)	(8,390)
Total	$ (1,601)	$ (8,449)
Number of Securities
Less than 12 Months (in securities) | security	1	2
12 Months or More (in securities) | security	24	71
Total (in securities) | security	25	73
Agency RMBS
Fair Value
Less than 12 Months	$ 12,743	$ 4,061,978
12 Months or More	4,587,889	3,366,167
Total	4,600,632	7,428,145
Unrealized Losses
Less than 12 Months	(45)	(50,083)
12 Months or More	(52,745)	(104,080)
Total	$ (52,790)	$ (154,163)
Number of Securities
Less than 12 Months (in securities) | security	26	211
12 Months or More (in securities) | security	197	198
Total (in securities) | security	223	409
Fair value option, fair value	$ 4,200,000	$ 6,100,000
Fair value option, unrealized losses	47,000	130,200
Agency-CMO
Fair Value
Less than 12 Months	9,749	152,962
12 Months or More	109,177	101,705
Total	118,926	254,667
Unrealized Losses
Less than 12 Months	(3,276)	(6,315)
12 Months or More	(3,380)	(5,100)
Total	$ (6,656)	$ (11,415)
Number of Securities
Less than 12 Months (in securities) | security	16	34
12 Months or More (in securities) | security	20	19
Total (in securities) | security	36	53
Agency IO
Number of Securities
Fair value option, fair value	$ 13,900	$ 21,800
Fair value option, unrealized losses	4,600	6,300
Agency-CMO
Number of Securities
Fair value option, fair value	17,900	66,000
Fair value option, unrealized losses	64	845
Non-Agency CMBS
Fair Value
Less than 12 Months	94,622	1,214,691
12 Months or More	478,174	659,298
Total	572,796	1,873,989
Unrealized Losses
Less than 12 Months	(538)	(17,778)
12 Months or More	(10,226)	(25,381)
Total	$ (10,764)	$ (43,159)
Number of Securities
Less than 12 Months (in securities) | security	9	94
12 Months or More (in securities) | security	41	52
Total (in securities) | security	50	146
Fair value option, fair value	$ 323,900	$ 831,300
Fair value option, unrealized losses	3,100	26,300
GSE CRT
Fair Value
Less than 12 Months	62,965	9,639
12 Months or More	0	0
Total	62,965	9,639
Unrealized Losses
Less than 12 Months	(381)	(193)
12 Months or More	0	0
Total	$ (381)	$ (193)
Number of Securities
Less than 12 Months (in securities) | security	4	1
12 Months or More (in securities) | security	0	0
Total (in securities) | security	4	1
Non-Agency RMBS
Fair Value
Less than 12 Months	$ 63,102	$ 87,850
12 Months or More	93,291	89,265
Total	156,393	177,115
Unrealized Losses
Less than 12 Months	(1,225)	(1,152)
12 Months or More	(591)	(1,138)
Total	$ (1,816)	$ (2,290)
Number of Securities
Less than 12 Months (in securities) | security	13	19
12 Months or More (in securities) | security	15	16
Total (in securities) | security	28	35
Fair value option, fair value	$ 6,100	$ 6,200
Fair value option, unrealized losses	223	79
Non-Agency IO
Number of Securities
Fair value option, fair value	4,900	3,700
Fair value option, unrealized losses	$ 821	$ 269

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Mortgage-Backed and Credit Risk Transfer Securities - OTTI included in earnings (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Other-than-temporary credit impairment losses	$ 1,776	$ 4,359
RMBS interest-only securities
Debt Securities, Available-for-sale [Line Items]
Other-than-temporary credit impairment losses	1,463	4,309
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Other-than-temporary credit impairment losses	$ 313	$ 50

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Mortgage-Backed and Credit Risk Transfer Securities - Realized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Gross realized gains on sale of investments	$ 1,202	$ 0
Gross realized losses on sale of investments	(12,317)	(9,237)
Other-than-temporary impairment losses	(1,776)	(4,359)
Net unrealized gains and losses on trading securities	0	(13)
Total gain (loss) on investments, net	268,382	(160,370)
MBS
Debt Securities, Available-for-sale [Line Items]
Net unrealized gains and losses on securities accounted for under the fair value option	280,039	(147,195)
GSE CRT
Debt Securities, Available-for-sale [Line Items]
Net unrealized gains and losses on securities accounted for under the fair value option	$ 1,234	$ 434

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Mortgage-Backed and Credit Risk Transfer Securities - Components of MBS and GSE CRT Interest Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Coupon Interest	$ 192,442	$ 166,319
Net (Premium Amortization)/Discount Accretion	(6,950)	(17,316)
Interest Income	185,492	149,003
Agency RMBS and Agency CMBS
Debt Securities, Available-for-sale [Line Items]
Coupon Interest	130,197	108,317
Net (Premium Amortization)/Discount Accretion	(12,725)	(23,222)
Interest Income	117,472	85,095
Non-Agency CMBS
Debt Securities, Available-for-sale [Line Items]
Coupon Interest	38,830	37,293
Net (Premium Amortization)/Discount Accretion	3,031	1,426
Interest Income	41,861	38,719
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Coupon Interest	14,267	14,012
Net (Premium Amortization)/Discount Accretion	3,922	5,177
Interest Income	18,189	19,189
GSE CRT
Debt Securities, Available-for-sale [Line Items]
Coupon Interest	8,596	6,525
Net (Premium Amortization)/Discount Accretion	(1,178)	(697)
Interest Income	7,418	5,828
Other
Debt Securities, Available-for-sale [Line Items]
Coupon Interest	552	172
Net (Premium Amortization)/Discount Accretion	0	0
Interest Income	$ 552	$ 172

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Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
FHLBI stock	$ 74,250	$ 74,250
Loan participation interest	53,827	54,981
Commercial loans, held-for-investment	24,454	31,582
Investments in unconsolidated ventures	24,129	24,012
Prepaid expenses and other assets	1,253	1,234
Total	$ 177,913	$ 186,059

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Other Assets - Additional Information (Details) - loan	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2018	Mar. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, term	2 years
Secured loan collateralized by mortgage servicing rights
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, term	2 years
Loans receivable, renewal option, term	1 year
Participation interest in a secured loan collateralized by mortgage servicing rights | LIBOR
Loans and Leases Receivable Disclosure [Line Items]
Loans receivable, basis spread on variable rate		6.14%	6.06%
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Number of loans		1	2
Weighted average years to maturity		1 year 11 months	1 year 8 months
Weighted average coupon rate		10.99%	10.69%

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Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Repurchase Agreements:
Amount outstanding	$ 16,824,387	$ 13,602,484
Weighted average interest rate	2.85%	2.80%
Weighted average remaining maturity	59 days	34 days
Secured Loans
Amount outstanding	$ 1,650,000	$ 1,650,000
Secured Debt, Excluding Asset-Backed Securities
Total Borrowings
Amount outstanding	$ 18,474,387	$ 15,252,484
Weighted average interest rate	2.84%	2.79%
Weighted average remaining maturity	220 days	242 days
Agency RMBS
Repurchase Agreements:
Amount outstanding	$ 11,868,925	$ 9,529,352
Weighted average interest rate	2.68%	2.56%
Weighted average remaining maturity	67 days	36 days
Agency CMBS
Repurchase Agreements:
Amount outstanding	$ 1,639,097	$ 810,450
Weighted average interest rate	2.67%	2.53%
Weighted average remaining maturity	72 days	31 days
Non-Agency CMBS
Repurchase Agreements:
Amount outstanding	$ 1,642,106	$ 1,616,473
Weighted average interest rate	3.57%	3.56%
Weighted average remaining maturity	18 days	19 days
Non-Agency RMBS
Repurchase Agreements:
Amount outstanding	$ 887,186	$ 923,959
Weighted average interest rate	3.46%	3.60%
Weighted average remaining maturity	25 days	26 days
GSE CRT
Repurchase Agreements:
Amount outstanding	$ 746,703	$ 681,014
Weighted average interest rate	3.49%	3.48%
Weighted average remaining maturity	20 days	21 days
Loan participation interest
Repurchase Agreements:
Amount outstanding	$ 40,370	$ 41,236
Weighted average interest rate	4.09%	4.09%
Weighted average remaining maturity	515 days	605 days
Secured Loans
Secured Loans
Amount outstanding	$ 1,650,000	$ 1,650,000
Weighted average interest rate	2.76%	2.68%
Weighted average remaining maturity	1862 days	1952 days

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Borrowings - Schedule of Maturities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Debt Disclosure [Abstract]
Borrowings maturing within 4/1/2019 - 3/31/2020	$ 17,084,017
Borrowings maturing within 4/1/2020 - 3/31/2021	140,370
Borrowings maturing within 4/1/2021 - 3/31/2022	0
Borrowings maturing within 4/1/2022 - 3/31/2023	0
Borrowings maturing within 4/1/2023 - 3/31/2024	0
Thereafter	1,250,000
Total	$ 18,474,387

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Borrowings - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Repurchase Agreement Counterparty
Collateral ratio	110.00%	111.00%
Advances from Federal Home Loan Banks	$ 1,650,000	$ 1,650,000
Minimum
Repurchase Agreement Counterparty
Repurchase obligation maturity	1 month
Maximum
Repurchase Agreement Counterparty
Repurchase obligation maturity	6 months
FHLBI
Repurchase Agreement Counterparty
Advances from Federal Home Loan Banks	$ 1,650,000
Average outstanding borrowings from FHLBI	$ 1,650,000
FHLBI weighted average interest rate on advances	2.70%
Weighted average maturity (in years)	5 years 1 month 6 days

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Collateral Positions (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Repurchase agreements collateral pledged	$ 18,453,134	$ 15,047,528
Securities loaned collateral pledged	1,947,052	1,930,364
Interest rate swaps, futures contracts and currency forward contracts collateral pledged	198,000	159,900
Total collateral pledged	20,616,169	17,151,306
Cash	2,273	18,083
Non-cash collateral	0	0
Total collateral held	2,273	18,083
Cash
Derivative [Line Items]
Total collateral pledged	18,025	13,500
Interest Rate Swaps, Future Contracts and Currency Forward Contracts
Derivative [Line Items]
Interest rate swaps, futures contracts and currency forward contracts collateral pledged	215,983	173,414
Interest Rate Swaps, Future Contracts and Currency Forward Contracts | Cash
Derivative [Line Items]
Interest rate swaps, futures contracts and currency forward contracts collateral pledged	18,025	13,500
Centrally Cleared Interest Rate Swaps
Derivative [Line Items]
Interest rate swaps, futures contracts and currency forward contracts collateral pledged	164,800	158,300
Centrally Cleared Interest Rate Swaps | Restricted Cash [Member]
Derivative [Line Items]
Interest rate swaps, futures contracts and currency forward contracts collateral pledged	5,025
Agency RMBS
Derivative [Line Items]
Repurchase agreements collateral pledged	12,575,947	10,158,404
Securities loaned collateral pledged	686,656	702,952
Agency RMBS | Interest Rate Swaps, Future Contracts and Currency Forward Contracts
Derivative [Line Items]
Interest rate swaps, futures contracts and currency forward contracts collateral pledged	197,958	159,914
Agency CMBS
Derivative [Line Items]
Repurchase agreements collateral pledged	1,763,779	870,702
Non-Agency CMBS
Derivative [Line Items]
Repurchase agreements collateral pledged	2,072,829	2,016,202
Securities loaned collateral pledged	1,260,396	1,227,412
Non-Agency RMBS
Derivative [Line Items]
Repurchase agreements collateral pledged	1,079,223	1,127,911
GSE CRT
Derivative [Line Items]
Repurchase agreements collateral pledged	907,529	819,328
Loan participation interest
Derivative [Line Items]
Repurchase agreements collateral pledged	53,827	54,981
Total collateral pledged	53,827	54,981
Mortgage-backed and credit risk transfer securities
Derivative [Line Items]
Total collateral pledged	$ 20,544,317	$ 17,082,825

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Derivatives and Hedging Activities - Outstanding Interest Rate Swaptions and Derivative Instrument Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Derivative Interest Rate Swaptions
Notional Amount as of December 31, 2018	$ 14,609,961
Additions	6,186,934
Settlement, Termination, Expiration or Exercise	(5,772,427)
Notional Amount as of March 31, 2019	15,024,468
Interest Rate Swaps
Derivative Interest Rate Swaptions
Notional Amount as of December 31, 2018	12,370,000
Additions	4,575,000
Settlement, Termination, Expiration or Exercise	(4,050,000)
Notional Amount as of March 31, 2019	12,895,000
Futures Contracts
Derivative Interest Rate Swaptions
Notional Amount as of December 31, 2018	1,689,900
Additions	1,586,400
Settlement, Termination, Expiration or Exercise	(1,689,900)
Notional Amount as of March 31, 2019	1,586,400
Currency Forward Contracts
Derivative Interest Rate Swaptions
Notional Amount as of December 31, 2018	23,149
Additions	25,534
Settlement, Termination, Expiration or Exercise	(23,149)
Notional Amount as of March 31, 2019	25,534
Credit Derivatives
Derivative Interest Rate Swaptions
Notional Amount as of December 31, 2018	526,912
Additions	0
Settlement, Termination, Expiration or Exercise	(9,378)
Notional Amount as of March 31, 2019	$ 517,534

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Derivatives and Hedging Activities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Decrease (increase) to interest expense	$ 5,900	$ 6,500
Amount reclassified to interest expenses within Next 12 months	23,800
Unrealized gain on discontinued cash flow hedges included in AOCI	2,671,714		$ 2,286,697
Notional amount	15,024,468		14,609,961
Derivative and hedging attributable to Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gain on discontinued cash flow hedges included in AOCI	93,800	$ 99,600
Currency Forward Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	25,534		23,149
Euro | Currency Forward Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 25,500		$ 23,100

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Derivatives and Hedging Activities - Schedule of Interest Rate Swaps Outstanding (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional amount	$ 15,024,468	$ 14,609,961
Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 12,895,000	$ 12,370,000
Weighted Average Fixed Pay Rate	2.37%	2.46%
Weighted Average Receive Rate	2.55%	2.55%
Weighted Average Years to Maturity	4 years 4 months 24 days	3 years 8 months 12 days
2020 | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 1,000,000	$ 1,500,000
Weighted Average Fixed Pay Rate	2.72%	2.70%
Weighted Average Receive Rate	2.50%	2.47%
Weighted Average Years to Maturity	1 year 5 months 5 days	10 months 18 days
2021 | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 2,800,000	$ 1,500,000
Weighted Average Fixed Pay Rate	2.49%	2.78%
Weighted Average Receive Rate	2.54%	2.51%
Weighted Average Years to Maturity	2 years 2 months 2 days	1 year 8 months 18 days
2022 | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 2,550,000	$ 2,300,000
Weighted Average Fixed Pay Rate	2.13%	2.51%
Weighted Average Receive Rate	2.61%	2.58%
Weighted Average Years to Maturity	3 years 2 months 12 days	2 years 5 months 15 days
2023 | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 1,500,000	$ 2,550,000
Weighted Average Fixed Pay Rate	2.21%	2.13%
Weighted Average Receive Rate	2.48%	2.65%
Weighted Average Years to Maturity	4 years 3 months 23 days	3 years 5 months 12 days
2024 | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 1,600,000	$ 1,600,000
Weighted Average Fixed Pay Rate	2.27%	2.39%
Weighted Average Receive Rate	2.65%	2.47%
Weighted Average Years to Maturity	4 years 10 months	4 years 8 months 25 days
Thereafter | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 3,445,000	$ 2,920,000
Weighted Average Fixed Pay Rate	2.46%	2.47%
Weighted Average Receive Rate	2.52%	2.55%
Weighted Average Years to Maturity	7 years 9 months 17 days	6 years 9 months 10 days
1-Month LIBOR | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 8,400,000	$ 6,700,000
3-Month LIBOR | Interest Rate Swaps
Derivative [Line Items]
Notional amount	$ 4,500,000	$ 5,700,000

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Derivatives and Hedging Activities - Schedule of Credit Derivatives (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional amount	$ 15,024,468	$ 14,609,961
GSE CRT | GSE CRT Embedded Derivatives
Derivative [Line Items]
Fair value amount	25,305	22,771
Notional amount	517,534	526,912
Maximum potential amount of future undiscounted payments	$ 517,534	$ 526,912

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Derivatives and Hedging Activities - Fair Value of Derivative Financial Instruments and Classification on Balance Sheet (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value
Derivative Assets	$ 8,742	$ 15,089
Derivative Liabilities	8,463	10,239
Interest Rate Swaps Asset
Derivatives, Fair Value
Derivative Assets	21,161	15,089
Interest Rate Swaps Liability
Derivatives, Fair Value
Derivative Liabilities	8,463	15,382
Currency Forward Contracts
Derivatives, Fair Value
Derivative Assets	311	0
Derivative Liabilities	0	172
Futures Contracts
Derivatives, Fair Value
Derivative Assets	5,108	0
Derivative Liabilities	$ 0	$ 7,836

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Derivatives and Hedging Activities - Effect of Derivative Financial Instruments on Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss)
Gain (loss) on derivative instruments, net	$ (201,460)	$ 133,367
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Realized gain (loss) on derivative instruments, net	(232,387)	113,578
Contractual net interest income (expense)	4,509	(12,112)
Unrealized gain (loss), net	26,418	31,901
Gain (loss) on derivative instruments, net	(201,460)	133,367
Not Designated as Hedging Instrument | GSE CRT Embedded Derivatives
Derivative Instruments, Gain (Loss)
Realized gain (loss) on derivative instruments, net	0	0
Contractual net interest income (expense)	5,350	5,633
Unrealized gain (loss), net	2,534	(2,468)
Gain (loss) on derivative instruments, net	7,884	3,165
Not Designated as Hedging Instrument | Interest Rate Swaps
Derivative Instruments, Gain (Loss)
Realized gain (loss) on derivative instruments, net	(165,884)	122,273
Contractual net interest income (expense)	4,509	(12,112)
Unrealized gain (loss), net	12,991	32,374
Gain (loss) on derivative instruments, net	(148,384)	142,535
Not Designated as Hedging Instrument | Futures Contracts
Derivative Instruments, Gain (Loss)
Realized gain (loss) on derivative instruments, net	(66,688)	(5,277)
Contractual net interest income (expense)	0	0
Unrealized gain (loss), net	12,944	(1,612)
Gain (loss) on derivative instruments, net	(53,744)	(6,889)
Not Designated as Hedging Instrument | Currency Forward Contracts
Derivative Instruments, Gain (Loss)
Realized gain (loss) on derivative instruments, net	185	(3,418)
Contractual net interest income (expense)	0	0
Unrealized gain (loss), net	483	1,139
Gain (loss) on derivative instruments, net	$ 668	$ (2,279)

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Derivatives and Hedging Activities - Credit Risk Related Contingent Features (Details) $ in Millions	Mar. 31, 2019 USD ($)
Central Clearing Counterparty
Derivative [Line Items]
Derivative asset (liability), net	$ 17.8
Bilateral Interest Rate Swap
Derivative [Line Items]
Collateral required to pledge	12.1
Bilateral Interest Rate Swap | Accrued Interest
Derivative [Line Items]
Derivative asset (liability), net	$ (8.4)

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Offsetting Assets and Liabilities - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative liabilities, at fair value	$ (8,463)	$ (23,390)
Central Clearing Counterparty
Derivative [Line Items]
Derivative liabilities, at fair value		$ (13,200)

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Offsetting Assets and Liabilities - Offsetting of Derivative Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives Asset
Gross Amounts of Recognized Assets	$ 8,742	$ 15,089
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Assets presented in the Condensed Consolidated Balance Sheets	8,742	15,089
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	0	(433)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Received	(2,201)	(14,656)
Net Amount	$ 6,541	$ 0

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Offsetting Assets and Liabilities - Offsetting of Derivative Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Derivatives Liability
Gross Amounts of Recognized Liabilities	$ 8,463	$ 10,239
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	8,463	10,239
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(8,463)	(2,058)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Posted	0	(7,836)
Net Amount	0	345
Repurchase Agreements
Gross Amounts of Recognized Liabilities	16,824,387	13,602,484
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	16,824,387	13,602,484
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(16,824,387)	(13,602,484)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Posted	0	0
Net Amount	0	0
Secured Loans
Gross Amounts of Recognized Liabilities	1,650,000	1,650,000
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	1,650,000	1,650,000
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(1,650,000)	(1,650,000)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Posted	0	0
Net Amount	0	0
Total Borrowings
Gross Amounts of Recognized Liabilities	18,482,850	15,262,723
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities presented in the Condensed Consolidated Balance Sheets	18,482,850	15,262,723
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(18,482,850)	(15,254,542)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Posted	0	(7,836)
Net Amount	0	345
Interest rate swaps collateral pledged	198,000	159,900
Cash collateral posted by Company's derivative counterparties	2,273	18,083
Due from counterparties	18,000	13,500
Fair value of securities pledged under repurchase agreement	18,453,134	15,047,528
Collateral pledged against secured loans	1,947,052	1,930,364
IAS Services LLC
Total Borrowings
Collateral pledged against secured loans	1,900,000
Centrally Cleared Interest Rate Swaps
Total Borrowings
Interest rate swaps collateral pledged	$ 164,800	$ 158,300

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Fair Value of Financial Instruments - Fair Value Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	$ 21,127,598		$ 17,396,642
Derivative Assets	8,742		15,089
Derivative Liabilities	$ 8,463		10,239
Weighted average remaining term of investments in unconsolidated ventures	2 years 9 months 25 days	2 years 7 months
Loan participation interest	$ 53,827		54,981
GSE CRT
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	907,529		819,329
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Embedded derivatives in an asset position	25,305		22,771
Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	21,127,598		17,396,642
Derivative Assets	26,580		15,089
Other assets, at fair value	77,956		78,993
Total assets	21,232,134		17,490,724
Derivative Liabilities	8,463		23,390
Total liabilities	8,463		23,390
Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	0		0
Derivative Assets	5,108		0
Other assets, at fair value	0		0
Total assets	5,108		0
Derivative Liabilities	0		7,836
Total liabilities	0		7,836
Recurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	21,102,293		17,373,871
Derivative Assets	21,472		15,089
Other assets, at fair value	0		0
Total assets	21,123,765		17,388,960
Derivative Liabilities	8,463		15,554
Total liabilities	8,463		15,554
Recurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage-backed and credit risk transfer securities, at fair value (including pledged securities of $20,544,317 and $17,082,825, respectively)	25,305		22,771
Derivative Assets	0		0
Other assets, at fair value	53,827		54,981
Total assets	79,132		77,752
Derivative Liabilities	0		0
Total liabilities	0		0
Recurring | Level 3 | GSE CRT
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Embedded derivatives at fair value	25,300		22,800
Embedded derivatives in an asset position	30,200		28,800
Embedded derivatives in a liability position	4,900		6,000
Recurring | NAV as a practical expedient
Fair Value, Balance Sheet Grouping, Financial Statement Captions
NAV as a practical expedient	$ 24,129		$ 24,012

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Fair Value of Financial Instruments - Embedded Derivatives Level 3 Roll Forward (Detail) - Embedded Credit Derivative - GSE CRT - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ 22,771	$ 45,400
Unrealized credit derivative gains (losses), net	2,534	(2,468)
Ending balance	$ 25,305	$ 42,932

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Fair Value of Financial Instruments - Loan participation interest Level 3 Roll Forward (Details) - Loan participation interest $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 54,981
Advances	577
Repayments	(1,731)
Ending balance	$ 53,827

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Fair Value of Financial Instruments - Embedded Derivatives Fair Value Inputs (Detail) - Level 3 $ in Thousands	Mar. 31, 2019 USD ($) year	Dec. 31, 2018 USD ($) year
Fair Value Inputs, Assets, Quantitative Information
GSE CRT Embedded Derivatives | $	$ 25,305	$ 22,771
Measurement Input, Expected Term | Minimum
Fair Value Inputs, Assets, Quantitative Information
GSE CRT Embedded Derivatives, measurement input	2.5	2.6
Measurement Input, Expected Term | Maximum
Fair Value Inputs, Assets, Quantitative Information
GSE CRT Embedded Derivatives, measurement input	5.6	6.8
Measurement Input, Expected Term | Weighted Average
Fair Value Inputs, Assets, Quantitative Information
GSE CRT Embedded Derivatives, measurement input	4.0	4.3

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Fair Value of Financial Instruments - Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Carrying Value
Financial Assets
Commercial loans, held-for-investment	$ 24,454	$ 31,582
FHLBI stock	74,250	74,250
Total assets	98,704	105,832
Financial Liabilities
Repurchase agreements	16,824,387	13,602,484
Secured loans	1,650,000	1,650,000
Total	18,474,387	15,252,484
Estimated Fair Value
Financial Assets
Commercial loans, held-for-investment	24,732	31,826
FHLBI stock	74,250	74,250
Total assets	98,982	106,076
Financial Liabilities
Repurchase agreements	16,825,642	13,602,050
Secured loans	1,650,000	1,650,000
Total	$ 18,475,642	$ 15,252,050

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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Management fee – related party	$ 9,534	$ 10,221
Investment in money market or mutual funds managed by affiliates of a related party	$ 78,482		$ 135,617
Manager
Related Party Transaction [Line Items]
Management fee as percentage of stockholders' equity per annum	1.50%
Termination fee multiplier	3
Termination fees assessment period	24 months
Invesco Advisers, Inc. | Affiliated Entity
Related Party Transaction [Line Items]
Management fee – related party	$ 183	214
Investment in money market or mutual funds managed by affiliates of a related party	$ 62,000	$ 131,900

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Related Party Transactions - Schedule of Relater Party Transactions (Details) - Manager - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Amounts of transaction with related party	$ 1,924	$ 1,657
Incurred costs, prepaid or expensed
Related Party Transaction [Line Items]
Amounts of transaction with related party	1,604	1,492
Incurred costs, charged against equity as a cost of raising capital
Related Party Transaction [Line Items]
Amounts of transaction with related party	$ 320	$ 165

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Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended			2 Months Ended	3 Months Ended
	May 03, 2019	Feb. 07, 2019	Apr. 30, 2019	Mar. 31, 2019	Aug. 31, 2017	Sep. 27, 2017	Mar. 31, 2019	Mar. 31, 2018	Sep. 28, 2017
Incentive Plan
Class of Stock [Line Items]
Number of shares of common stock remain available for future issuance (in shares)				748,492			748,492
Total unrecognized compensation cost				$ 185			$ 185
Share-based compensation cost not yet recognized, period for recognition							48 months
Weighted average remaining vesting period							24 months
Preferred Stock
Class of Stock [Line Items]
Preferred stock, redemption price per share (dollars per share)				$ 25			$ 25
Equity distribution agreement, authorized (in shares)				7,000,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend rate							7.75%
Preferred stock, liquidation preference (dollars per share)				$ 25			$ 25
Preferred stock, dividends per annum (dollars per share)							$ 1.9375
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend rate							7.75%
Preferred stock, liquidation preference (dollars per share)				$ 25			$ 25
Preferred stock, dividends per annum (dollars per share)							$ 1.9375
Series B Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock dividend variable rate spread				5.18%			5.18%
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend rate					7.50%
Preferred stock, liquidation preference (dollars per share)					$ 25
Preferred stock, dividends per annum (dollars per share)						$ 1.875
Series C Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock dividend variable rate spread									5.289%
Common Stock
Class of Stock [Line Items]
Equity distribution agreement, authorized (in shares)				17,000,000
Number of shares issued during period		16,100,000
Sale of stock, price (in USD per share)		$ 15.73
Proceeds from issuance of common stock		$ 249,500
Remaining number of shares authorized to be repurchased (in shares)				18,239,082			18,239,082
Common Stock | Incentive Plan
Class of Stock [Line Items]
Number of shares authorized (in shares)				1,000,000			1,000,000
Compensation expense recognized							$ 19
Common Stock | Equity Distribution Agreement
Class of Stock [Line Items]
Number of shares issued during period							572,000
Proceeds from issuance of common stock							$ 9,100
Payments of stock issuance commission and fees							193
Directors | Common Stock | Incentive Plan
Class of Stock [Line Items]
Compensation expense recognized							$ 113	$ 93
Restricted stock issued (in shares)							7,065	7,177
Employees of the Manager snd its affiliates | Common Stock | Incentive Plan
Class of Stock [Line Items]
Compensation expense recognized								$ 14
Subsequent Event | Incentive Plan
Class of Stock [Line Items]
Number of shares authorized (in shares)	200,000
Extended expiration period	10 years
Subsequent Event | Common Stock
Class of Stock [Line Items]
Sale of stock, price (in USD per share)			$ 15.83
Subsequent Event | Common Stock | Equity Distribution Agreement
Class of Stock [Line Items]
Number of shares issued during period			90,000
Proceeds from issuance of common stock			$ 1,400
Payments of stock issuance commission and fees			$ 30

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Shareholders' Equity - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Restricted Stock Units
Unvested at the beginning of the period (in shares) | shares	11,051
Shares granted during the period (in shares) | shares	6,189
Shares vested during the period (in shares) | shares	(4,720)
Unvested at the end of the period (in shares) | shares	12,520
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, at the beginning of the period (usd per share) | $ / shares	$ 14.55
Granted, Weighted Average Grant Date Fair Value (usd per share) | $ / shares	15.92
Vested, Weighted Average Grant Date Fair Value (usd per share) | $ / shares	14.48
Weighted Average Grant Date Fair Value, at the end of the period (usd per share) | $ / shares	$ 15.25

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Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	$ 52,349	$ (132,317)
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	10,147	9,237
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	(5,851)	(6,539)
Currency translation adjustments on investment in unconsolidated venture	(276)	312
Total other comprehensive income (loss)	56,369	(129,307)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period		2,656,878
Total other comprehensive income (loss)	56,369	(129,307)
Other comprehensive income/(loss) attributable to non-controlling interest		1,630
Balance at end of period		2,522,356
Equity method investments including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Currency translation adjustments on investment in unconsolidated venture	(276)	312
Total other comprehensive income (loss)	(276)	312
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive income (loss)	(276)	312
Other comprehensive income/(loss) attributable to non-controlling interest		(4)
Available-for-sale securities including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gain (loss) on mortgage-backed and credit risk transfer securities, net	52,349	(132,317)
Reclassification of unrealized (gain) loss on sale of mortgage-backed and credit risk transfer securities to gain (loss) on investments, net	10,147	9,237
Total other comprehensive income (loss)	62,496	(123,080)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive income (loss)	62,496	(123,080)
Other comprehensive income/(loss) attributable to non-controlling interest		1,552
Derivative and hedging including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of amortization of net deferred (gain) loss on de-designated interest rate swaps to repurchase agreements interest expense	(5,851)	(6,539)
Total other comprehensive income (loss)	(5,851)	(6,539)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive income (loss)	(5,851)	(6,539)
Other comprehensive income/(loss) attributable to non-controlling interest		82
Equity method investments attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	513	947
Balance at end of period	237	1,255
Available-for-sale securities attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	120,664	136,188
Balance at end of period	183,160	14,660
Derivative and hedging attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	99,636	123,894
Balance at end of period	93,785	117,437
Accumulated other comprehensive income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss)	56,369	(127,677)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	220,813	261,029
Total other comprehensive income (loss)	56,369	(127,677)
Balance at end of period	$ 277,182	$ 133,352

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Stockholders' Equity - Schedule of Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Class of Stock [Line Items]
Common stock dividend declared (dollars per share)	$ 0.45	$ 0.42
Dividends, common stock	$ 57,720	$ 46,887
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend declared (dollars per share)	$ 0.4844	$ 0.4844
Dividends, preferred stock	$ 2,713	$ 2,713
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend declared (dollars per share)	$ 0.4844	$ 0.4844
Dividends, preferred stock	$ 3,003	$ 3,003
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend declared (dollars per share)	$ 0.46875	$ 0.46875
Dividends, preferred stock	$ 5,391	$ 5,391

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Earnings per Common Share - Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic Earnings:
Net income available to common stockholders	$ 127,683	$ 41,471
Effect of dilutive securities:
Income allocated to exchangeable senior notes	0	1,621
Income allocated to non-controlling interest	0	671
Dilutive net income available to stockholders	$ 127,683	$ 43,763
Basic Earnings:
Shares available to common stockholders (in shares)	121,098	111,629
Effect of dilutive securities:
Restricted stock awards (in shares)	12	20
Non-controlling interest OP units (in shares)	0	1,425
Exchangeable senior notes (in shares)	0	4,803
Dilutive Shares (in shares)	121,110	117,877
Net income attributable to common stockholders
Basic (usd per share)	$ 1.05	$ 0.37
Diluted (usd per share)	$ 1.05	$ 0.37

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Commitments and Contingencies (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended		3 Months Ended
	Feb. 07, 2019	Apr. 30, 2019	Aug. 31, 2018	Mar. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Undrawn capital and purchase commitments for unconsolidated ventures sponsored by an affiliate				$ 7,600	$ 10,000
Loans receivable, term			2 years
Loan participation interest
Loans and Leases Receivable Disclosure [Line Items]
Unfunded commitment				$ 21,200
Common Stock
Loans and Leases Receivable Disclosure [Line Items]
Number of shares issued during period	16,100
Sale of stock, price (in USD per share)	$ 15.73
Proceeds from issuance of common stock	$ 249,500
Equity Distribution Agreement | Common Stock
Loans and Leases Receivable Disclosure [Line Items]
Number of shares issued during period				572
Proceeds from issuance of common stock				$ 9,100
Payments of stock issuance commission and fees				$ 193
Subsequent Event | Common Stock
Loans and Leases Receivable Disclosure [Line Items]
Sale of stock, price (in USD per share)		$ 15.83
Subsequent Event | Equity Distribution Agreement | Common Stock
Loans and Leases Receivable Disclosure [Line Items]
Number of shares issued during period		90
Proceeds from issuance of common stock		$ 1,400
Payments of stock issuance commission and fees		$ 30

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Subsequent Events (Details) - Incentive Plan - Subsequent Event	May 03, 2019 shares
Subsequent Event [Line Items]
Number of shares authorized (in shares)	200,000
Extended expiration period	10 years