MetLife, Inc. Notes to the Consolidated Financial Statements — (Continued) 153 MetLife, Inc. Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Fixed Maturity Securities: U.S. Corporate Foreign Corporate Foreign Government U.S. Treasury and Agency RMBS CMBS ABS State and Political Subdivision Other (In millions) Year Ended December 31, 2011: Balance, January 1, ..................$ 7,149 $ 5,726 $ 3,134 $ 79 $ 2,541 $ 1,011 $ 3,026 $ 46 $ 4 Total realized/unrealized gains (losses) included in: Net income (loss): (1), (2) ............ Net investment income ........... 11 27 18 — 10 25 24 — — Net investment gains (losses) ...... 17 (9) — — (41) (16) (18) — — Net derivative gains (losses) ........ — — — — — — — — — Other revenues ................. — — — — — — — — — Policyholder benefits and claims .... — — — — — — — — — Other expenses ................. — — — — — — — — — Other comprehensive income (loss) . . . 327 (66) — 3 (5) 71 81 (8) — Purchases (3) ...................... 912 1,740 529 6 393 283 1,033 11 — Sales (3) .......................... (887) (2,094) (179) (1) (213) (178) (659) (4) (4) Issuances (3) ....................... — — — — — — — — — Settlements (3) ..................... — — — — — — — — — Transfers into Level 3 (4) .............. 169 211 123 — 20 52 14 10 — Transfers out of Level 3 (4) ............ (914) (1,165) (1,303) (56) (1,103) (495) (1,651) (2) — Balance, December 31, ..............$ 6,784 $ 4,370 $ 2,322 $ 31 $ 1,602 $ 753 $ 1,850 $ 53 $ — Changes in unrealized gains (losses) included in net income (loss): (5) ...... Net investment income ...........$ 10 $ 19 $ 18 $ — $ 11 $ 24 $ 20 $ — $ — Net investment gains (losses) ......$ (27) $ (31) $ (3) $ — $ (41) $ (14) $ (10) $ — $ — Net derivative gains (losses) ........$ — $ — $ — $ — $ — $ — $ — $ — $ — Other revenues .................$ — $ — $ — $ — $ — $ — $ — $ — $ — Policyholder benefits and claims ....$ — $ — $ — $ — $ — $ — $ — $ — $ — Other expenses .................$ — $ — $ — $ — $ — $ — $ — $ — $ —