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Derivatives and Hedging Activities (Tables)
12 Months Ended
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments
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 December 31, 2019
Interest Rate Swaps
12,370,000

 
26,950,000

 
(25,320,000
)
 
14,000,000

Futures Contracts
1,689,900

 
3,625,800

 
(5,315,700
)
 

Currency Forward Contracts
23,149

 
101,597

 
(101,635
)
 
23,111

Credit Derivatives
526,912

 

 
(61,946
)
 
464,966

Total
14,609,961

 
30,677,397

 
(30,799,281
)
 
14,488,077


Schedule of Interest Rate Swaps Outstanding
As of December 31, 2019, we had interest rate swaps with the following maturities outstanding: 
$ in thousands
 
As of December 31, 2019
Maturities
 
Notional Amount (1)
 
Weighted Average Fixed Pay Rate
 
Weighted Average Receive Rate
 
Weighted Average Years to Maturity
2020
 
1,900,000

 
1.67
%
 
1.84
%
 
0.6
2021
 
2,500,000

 
1.40
%
 
1.77
%
 
1.3
2022
 
800,000

 
1.53
%
 
1.91
%
 
2.9
2023
 
2,400,000

 
1.44
%
 
1.72
%
 
3.9
2024
 
900,000

 
1.49
%
 
1.76
%
 
4.8
Thereafter
 
5,500,000

 
1.44
%
 
1.78
%
 
9.5
Total
 
14,000,000

 
1.47
%
 
1.79
%
 
5.2

$ 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 $10.7 billion of interest rate swaps that receive variable payments based on 1-month LIBOR and $3.3 billion of interest rate swaps that receive variable payments based on 3-month LIBOR as of December 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.
Schedule of Credit Derivatives As of December 31, 2019 and 2018, terms of the GSE CRT embedded derivatives are:
$ in thousands
December 31, 2019
 
December 31, 2018
Fair value amount
10,281

 
22,771

Notional amount
464,966

 
526,912

Maximum potential amount of future undiscounted payments
464,966

 
526,912


Schedule of 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 our consolidated balance sheets as of December 31, 2019 and 2018.
$ in thousands
 
 
 
 
 
 
 
 
 
 
Derivative Assets
 
Derivative Liabilities
 
 
As of December 31, 2019
 
As of December 31, 2018
 
 
 
As of December 31, 2019
 
As of December 31, 2018
Balance
Sheet
 
Fair Value
 
Fair Value
 
Balance
Sheet
 
Fair Value
 
Fair Value
Interest Rate Swaps Asset
 
18,533

 
15,089

 
Interest Rate Swaps Liability
 

 
15,382

Currency Forward Contracts
 

 

 
Currency Forward Contracts
 
352

 
172

Futures Contracts
 

 

 
Futures Contracts
 

 
7,836

Total Derivative Assets
 
18,533

 
15,089

 
Total Derivative Liabilities
 
352

 
23,390


Schedule of Effect of Derivative Financial Instruments on Statement of Operations
The tables below present the effect of our credit derivatives on our consolidated statements of operations for the years ended December 31, 2019, 2018 and 2017.
$ in thousands
Year ended December 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

 
20,833

 
(12,490
)
 
8,343

$ in thousands
Year ended December 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

 
22,478

 
(22,629
)
 
(151
)

$ in thousands
Year ended December 31, 2017
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

 
23,343

 
28,305

 
51,648

The following tables summarize the effect of interest rate swaps, futures contracts, currency forward contracts and TBAs reported in gain (loss) on derivative instruments, net on the consolidated statements of operations for the years ended December 31, 2019, 2018 and 2017.
$ in thousands
Year ended December 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
(440,626
)
 
35,840

 
18,826

 
(385,960
)
Future Contracts
(157,929
)
 

 
7,836

 
(150,093
)
Currency Forward Contracts
1,478

 

 
(180
)
 
1,298

Total
(597,077
)
 
35,840

 
26,482

 
(534,755
)

$ in thousands
Year ended December 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
81,417

 
(20,015
)
 
24,358

 
85,760

Future Contracts
(86,318
)
 

 
(7,836
)
 
(94,154
)
Currency Forward Contracts
2,088

 

 
1,046

 
3,134

TBAs
(17
)
 

 

 
(17
)
Total
(2,830
)
 
(20,015
)
 
17,568

 
(5,277
)

$ in thousands
Year ended December 31, 2017
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
72,894

 
(77,076
)
 
28,316

 
24,134

Currency Forward Contracts
(5,056
)
 

 
(923
)
 
(5,979
)
Total
67,838

 
(77,076
)
 
27,393

 
18,155