STI 2018 Annual Report

48 Investment Securities Portfolio Composition (continued) December 31, 2016 1 (Dollars in millions) Amortized Cost Unrealized Gains Unrealized Losses Fair Value Securities AFS: U.S. Treasury securities $5,486 $5 $86 $5,405 Federal agency securities 310 5 2 313 U.S. states and political subdivisions 279 5 5 279 MBS - agency residential 22,379 311 254 22,436 MBS - agency commercial 1,263 2 39 1,226 MBS - non-agency residential 71 3 — 74 MBS - non-agency commercial 257 — 5 252 ABS 8 2 — 10 Corporate and other debt securities 34 1 — 35 Total securities AFS $30,087 $334 $391 $30,030 1 Beginning January 1, 2018, we reclassified equity securities previously presented in Securities available for sale to Other assets on the Consolidated Balance Sheets. Prior periods have been revised to conform to the current presentation for comparability. See Note 11, "Other Assets," to the Consolidated Financial Statements in this Form 10-K for additional information. Maturity Distribution of Investment Securities Table 13 December 31, 2018 (Dollars in millions) Due in 1 Year or Less Due After 1 Year through 5 Years Due After 5 Years through 10 Years Due After 10 Years Total Amortized Cost 1 : Securities AFS: U.S. Treasury securities $315 $2,646 $1,316 $— $4,277 Federal agency securities 112 29 8 72 221 U.S. states and political subdivisions 2 81 15 508 606 MBS - agency residential 1,558 3,684 15,962 1,957 23,161 MBS - agency commercial 1 495 1,885 307 2,688 MBS - non-agency commercial — 12 931 — 943 Corporate and other debt securities — 14 — — 14 Total securities AFS $1,988 $6,961 $20,117 $2,844 $31,910 Fair Value 1 : Securities AFS: U.S. Treasury securities $312 $2,603 $1,296 $— $4,211 Federal agency securities 113 29 8 71 221 U.S. states and political subdivisions 2 84 16 487 589 MBS - agency residential 1,607 3,655 15,682 1,920 22,864 MBS - agency commercial 1 483 1,845 298 2,627 MBS - non-agency commercial — 12 904 — 916 Corporate and other debt securities — 14 — — 14 Total securities AFS $2,035 $6,880 $19,751 $2,776 $31,442 Weighted average yield 2 : Securities AFS: U.S. Treasury securities 1.64% 1.93% 2.31% —% 2.03% Federal agency securities 5.28 3.37 2.62 2.81 4.14 U.S. states and political subdivisions 5.17 4.00 4.04 3.27 3.40 MBS - agency residential 3.17 2.43 3.05 3.11 2.97 MBS - agency commercial — 2.19 2.73 2.89 2.64 MBS - non-agency commercial — 2.26 3.24 — 3.22 Corporate and other debt securities — 3.39 — — 3.39 Total securities AFS 3.05% 2.25% 2.98% 3.11% 2.84% 1 The amortized cost and fair value of investment securities are presented based on remaining contractual maturity, with the exception of MBS, which are based on estimated average life. Receipt of cash flows may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties. 2 Weighted average yields are based on amortized cost and presented on an FTE basis.