Debt

12 Months Ended

Dec. 31, 2019

Warehouse Credit Facilities—To provide capital for the mortgage loans that it originates, Redfin Mortgage utilizes warehouse credit facilities that are classified as current liabilities in our consolidated balance sheets. Borrowings under each warehouse credit facility are secured by the related mortgage loan and rights and income related to the loans. The following table summarizes borrowings under these facilities as of the periods presented:



Lender	Borrowing Capacity as of December 31, 2019		Borrowings as of December 31, 2019		Borrowings as of December 31, 2018
Western Alliance Bank	$	24,500	$	8,489	$	1,141
Texas Capital Bank, N.A.	24,500		10,210		3,592
Flagstar Bank, FSB	15,000		2,603		N/A
Total	$	64,000	$	21,302	$	4,733

Borrowings under the facility with Western Alliance Bank ("Western Alliance") mature on June 15, 2020 and generally bear interest at a rate equal to the greater of (i) one-month LIBOR plus 2.00% or (ii) 3.50%. The weighted average interest rate on outstanding borrowings as of December 31, 2019 and 2018 was 3.79% and 5.26%, respectively. The agreement governing the facility requires Redfin Mortgage to maintain certain financial covenants. Additionally, Redfin Corporation has agreed to make capital contributions in an amount necessary for Redfin Mortgage to satisfy its adjusted tangible net worth financial covenant under the agreement. Redfin Mortgage is in default of this facility because it failed to satisfy a financial covenant as of December 31, 2019, but Western Alliance has not enforced its remedy under the agreement of requiring Redfin Mortgage to repurchase all outstanding loans held by the lender.

Borrowings under the facility with Texas Capital Bank, N.A. ("Texas Capital") mature on May 6, 2020 and generally bear interest at a rate equal to the greater of (i) the rate of interest accruing on the outstanding principal balance of the loan minus 0.5% or (ii) 3.5%. The weighted average interest rate on outstanding borrowings as of December 31, 2019 and 2018 was 3.51% and 4.11%, respectively. The agreement governing the facility requires Redfin Mortgage to maintain certain financial covenants. Additionally, Redfin Corporation has guaranteed Redfin Mortgage’s obligations under the agreement. Redfin Mortgage is in default of this facility because it failed to satisfy a financial covenant as of December 31, 2019, but Texas Capital has not enforced its remedies under the agreement, which principally include the rights to (i) cease purchasing participation interests in loans from Redfin Mortgage and (ii) sell all interests of Texas Capital or Redfin Mortgage in any loan subject to the agreement.

Borrowings under the facility with Flagstar Bank, FSB ("Flagstar") generally bear interest at a rate equal to the greater of (i) one-month LIBOR plus 2.00% or (ii) 3.00%. The weighted average interest rate on outstanding borrowings as of December 31, 2019 was 3.69%.The Flagstar facility does not have a stated maturity date, but Flagstar may terminate the facility upon 30 days prior notice. Redfin Mortgage would be required to pay all amounts owed to Flagstar upon the facility's termination.

Secured Revolving Credit Facility—To provide capital for the homes that it purchases, RedfinNow has, through a special purpose entity called RedfinNow Borrower, entered into a secured revolving credit facility with Goldman Sachs. Borrowings under the facility are secured by RedfinNow Borrower's assets, including the financed homes, as well as the equity interests in RedfinNow Borrower. The following table summarizes borrowings under this facility as of the period presented:



Lender	Borrowing Capacity as of December 31, 2019		Borrowings as of December 31, 2019
Goldman Sachs Bank USA	$	100,000	$	4,444

The facility matures on January 26, 2021, but we may extend the maturity date for an additional six months to repay outstanding borrowings. Goldman Sachs may, at its sole option, finance a portion of RedfinNow Borrower's acquisition costs of qualified homes that have been purchased. The portion financed

is based, in part, on how long the qualifying home has been owned by a Redfin entity. Borrowings under the facility generally bear interest at a rate of one-month LIBOR (subject to a floor of 0.50%) plus 2.65%. The weighted average interest rate on outstanding borrowings as of December 31, 2019 was 4.45%.

RedfinNow Borrower must repay all borrowings and accrued interest upon the termination of the facility, and it has the option to repay the borrowings, and the related interest, with respect to a specific financed home upon the sale of such home. In certain situations involving a financed home remaining unsold after a certain time period or becoming ineligible for financing under the facility, RedfinNow Borrower may be obligated to repay all or a portion of the borrowings, and related interest, with respect to such home prior to the sale of such home. In instances involving "bad acts," Redfin Corporation has guaranteed repayment of amounts owed under the facility, in some situations, and indemnification of certain expenses incurred, in other situations.

As of December 31, 2019, RedfinNow Borrower had $16,200 of total assets, of which $7,456 related to inventory and $5,663 in cash and cash equivalents.

For the year ended December 31, 2019, we amortized $256 of the debt issuance costs and recognized $17 of interest expense.

Convertible Senior Notes—On July 23, 2018, we issued $143,750 aggregate principal amount of convertible senior notes. The notes are senior, unsecured obligations of Redfin Corporation and bear interest at a fixed rate of 1.75% per year, payable semi-annually in arrears on January 15 and July 15. The effective interest rate of the liability portion of the debt is 7.25%. The notes mature on July 15, 2023, unless earlier repurchased, redeemed or converted. As of December 31, 2019, no conversion events have occurred. We will settle conversions of the notes by paying or delivering, as the case may be, cash, shares of our common stock, or a combination of cash and shares of our common stock, at our election. We have the ability, and intend, to settle any conversions solely in cash.

The convertible senior notes consisted of the following:



	Year Ended December 31,
	2019			2018
Principal	$	143,750		$	143,750
Less: debt discount, net of amortization	(21,231		)	(26,636		)
Less: debt issuance costs, net of amortization	(2,803		)	(3,528		)
Net carrying amount of the convertible senior notes	$	119,716		$	113,586

The total estimated fair value of the notes as of December 31, 2019 and 2018 was approximately $142,672 and $117,875, respectively, based on the closing trading price of the notes on last trading day for the period. The fair value has been classified as Level 2 within the fair value hierarchy given the limited trading activity of the notes.

The following table sets forth total interest expense recognized related to the convertible senior notes for the periods presented:



	Year Ended December 31,
	2019		2018
Amortization of debt discount	$	5,405	$	2,280
Amortization of debt issuance costs	724		304
Total amortization of debt issuance costs and accretion of equity portion	6,129		2,584
Contractual interest expense	2,516		1,097
Total interest expense related to the convertible senior notes	$	8,645	$	3,681