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CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Interest Income |  |  |  |
Residential loans | $ 53,993 | $ 44,921 | $ 146,081 | $ 179,331
Business purpose loans | 67,129 | 55,637 | 201,640 | 161,710
Multifamily loans | 4,846 | 4,918 | 14,492 | 49,960
Real estate securities | 14,242 | 10,135 | 33,184 | 38,471
Other interest income | 5,512 | 6,371 | 17,325 | 20,537
Total interest income | 145,722 | 121,982 | 412,722 | 450,009
Interest Expense |  |  |  |
Short-term debt | (11,826) | (5,145) | (30,794) | (45,119)
Asset-backed securities issued | (73,732) | (66,514) | (222,712) | (232,316)
Long-term debt | (18,196) | (28,752) | (60,865) | (72,313)
Total interest expense | (103,754) | (100,411) | (314,371) | (349,748)
Net Interest Income | 41,968 | 21,571 | 98,351 | 100,261
Non-interest Income (Loss) |  |  |  |
Mortgage banking activities, net | 63,163 | 59,395 | 200,189 | 24,511
Investment fair value changes, net | 26,077 | 107,047 | 120,644 | (611,557)
Other income, net | 2,388 | (114) | 8,357 | 3,979
Realized gains, net | 6,703 | 602 | 17,803 | 30,419
Total non-interest income (loss), net | 98,331 | 166,930 | 346,993 | (552,648)
General and administrative expenses | (47,692) | (27,630) | (131,837) | (84,832)
Loan acquisition costs | (4,621) | (2,158) | (11,928) | (7,716)
Other expenses | (4,023) | (7,788) | (12,104) | (104,286)
Net Income (Loss) before (Provision for) Benefit from Income Taxes | 83,963 | 150,925 | 289,475 | (649,221)
Benefit from (provision for) income taxes | 4,323 | (9,113) | (13,907) | 13,079
Net Income (Loss) | $ 88,286 | $ 141,812 | $ 275,568 | $ (636,142)
Basic earnings (loss) per common share (in dollars per share) | $ 0.75 | $ 1.21 | $ 2.36 | $ (5.60)
Diluted earnings (loss) per common share (in dollars per share) | $ 0.65 | $ 1.02 | $ 2.03 | $ (5.60)
Basic weighted average shares outstanding (in shares) | 112,995,847 | 113,403,102 | 112,754,691 | 113,952,308
Diluted weighted average shares outstanding (in shares) | 141,855,471 | 141,969,977 | 141,575,385 | 113,952,308

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