Mortgage-Backed Securities | MORTGAGE-BACKED SECURITIES The following tables provide details on the Company’s MBS by investment type as of the dates indicated: September 30, 2022 December 31, 2021 Current Face Amortized Cost Fair Value Current Face Amortized Cost Fair Value Agency RMBS $ 3,164,044 $ 3,211,908 $ 2,776,569 $ 2,639,747 $ 2,713,907 $ 2,686,775 Agency CMBS 137,067 137,987 130,384 174,899 177,211 184,847 CMBS IO (1) n/a 257,418 243,171 n/a 298,197 309,419 Non-Agency other 232 232 182 966 777 798 Total $ 3,301,343 $ 3,607,545 $ 3,150,306 $ 2,815,612 $ 3,190,092 $ 3,181,839 (1) The notional balance for Agency CMBS IO and non-Agency CMBS IO was $9,986,364 and $6,594,280, respectively, as of September 30, 2022, and $10,630,713 and $8,635,666, respectively, as of December 31, 2021. September 30, 2022 Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value MBS measured at fair value through OCI: Agency RMBS $ 1,002,705 $ — $ (180,099) $ 822,606 Agency CMBS 122,678 — (6,171) 116,507 CMBS IO 211,112 288 (10,597) 200,803 Non-Agency other 232 — (50) 182 Total $ 1,336,727 $ 288 $ (196,917) $ 1,140,098 MBS measured at fair value through net income: Agency RMBS $ 2,209,203 $ — $ (255,240) $ 1,953,963 Agency CMBS 15,309 — (1,432) 13,877 CMBS IO 46,306 — (3,938) 42,368 Total $ 2,270,818 $ — $ (260,610) $ 2,010,208 December 31, 2021 Amortized Cost Gross Unrealized Gain Gross Unrealized Loss Fair Value MBS measured at fair value through OCI: Agency RMBS $ 1,232,738 $ 7,779 $ (19,994) $ 1,220,523 Agency CMBS 177,211 7,636 — 184,847 CMBS IO 276,354 11,713 (426) 287,641 Non-Agency other 777 63 (42) 798 Total $ 1,687,080 $ 27,191 $ (20,462) $ 1,693,809 MBS measured at fair value through net income: Agency RMBS $ 1,481,169 $ — $ (14,917) $ 1,466,252 CMBS IO 21,843 57 (122) 21,778 Total $ 1,503,012 $ 57 $ (15,039) $ 1,488,030 The majority of the Company’s MBS are pledged as collateral for the Company’s repurchase agreements, which are disclosed in Note 4 . Actual maturities of MBS are affected by the contractual lives of the underlying mortgage collateral, periodic payments of principal, prepayments of principal, and the payment priority structure of the security; therefore, actual maturities are generally shorter than the securities' stated contractual maturities. The following table presents information regarding unrealized gains and losses on investments reported within net income on the Company’s consolidated statements of comprehensive income for the periods indicated: Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 Agency RMBS $ (65,723) $ (3,101) $ (240,322) $ (3,080) Agency CMBS (1,432) — (1,432) — CMBS IO (2,033) (26) (3,874) (10) Mortgage loans held for investment and other assets (9) 42 77 109 Total unrealized (loss) gain on investments, net $ (69,197) $ (3,085) $ (245,551) $ (2,981) The following table presents information regarding realized gains and losses sales of investments reported in the Company’s consolidated statements of comprehensive income for the periods indicated: Three Months Ended Nine Months Ended September 30, September 30, 2022 2021 2022 2021 Realized gains on sales of MBS - AFS $ — $ — $ — $ 6,705 Realized losses on sales of MBS - AFS (14,025) — (14,025) — Realized gains on sales of MBS - FVO — — — — Realized losses on sales of MBS - FVO (56,942) — (75,492) — Total realized (loss) gain on sale of investments, net $ (70,967) $ — $ (89,517) $ 6,705 The following table presents certain information for MBS designated as AFS that were in an unrealized loss position as of the dates indicated: September 30, 2022 December 31, 2021 Fair Value Gross Unrealized Losses # of Securities Fair Value Gross Unrealized Losses # of Securities Continuous unrealized loss position for less than 12 months: Agency MBS $ 362,885 $ (24,993) 81 $ 1,051,233 $ (20,118) 23 Non-Agency MBS 53,113 (2,120) 59 11,667 (247) 14 Continuous unrealized loss position for 12 months or longer: Agency MBS $ 705,141 $ (169,259) 17 $ — $ — — Non-Agency MBS 6,207 (545) 13 1,241 (97) 6 The unrealized losses on the Company’s MBS designated as AFS were the result of declines in market prices and were not credit related; therefore, the Company’s allowance for credit losses on its MBS was $0 as of September 30, 2022 and December 31, 2021. The principal related to Agency MBS is guaranteed by the GSEs Fannie Mae and Freddie Mac. Although the unrealized losses are not credit related, the Company assesses its ability and intent to hold any MBS with an unrealized loss until the recovery in its value. This assessment is based on the amount of the unrealized loss and significance of the related investment as well as the Company’s leverage and liquidity position. In addition, for its non-Agency MBS, the Company reviews the credit ratings, the credit characteristics of the mortgage loans collateralizing these securities, and the estimated future cash flows including projected collateral losses. |