Note 10 - Investment Securities Available For Sale >. The amortized cost, gross unrealized gains and losses, approximate market value, weighted average yield and maturities of investment securities held for sale at December 31, 2001 and 2000 were as follows: December 31, 2001 December 31, 2000 Weighted Weighted Amortized Unrealized Market average Amortized Unrealized Market average cost gains (losses) value  yield% cost gains (losses) value yield% U.S.Treasury Securities: (Dollars in thousands) Within 1 year $ 7,726 $ 30 $ 7,756 3.18 $ 499 $ 2 $ 501 6.04 After 1 to 5 years 2,630 33 2,663 6.49 After 5 to 10 years 39,624 $ (718) 38,906 4.89 After 10 years  67,555 1,124 (1,579) 67,100 5.50 Obligations of other U.S. Government Agencies: Within 1 year 407,324 $(32) 407,292 1.72 240,341 48 (2) 240,387 6.76 After 1 to 5 years  31,705 144 31,849 7.86 After 5 to 10 years 500 1 501 5.59 29,988 217 30,205 7.81 After 10 years 87,519 469 (1,805) 86,183 7.55 53,593 322 (3,302) 50,613 7.66 Puerto Rico Government  Obligations: After 1 to 5 years 20,000 20,000 7.41 After 5 to 10 years  4,458 128 4,586 6.19 429 3 (14) 418 6.65 After 10 years 5,932 151 6,083 6.34 8,840 105 (320) 8,625 6.51 United States and  Puerto Rico Government  Obligations $513,459 $779 $(1,837) $512,401 2.83 $495,204 $ 1,998 $(5,935) $ 491,267 6.69 Mortgage backed securities: FHLMC certificates: Within 1 year $ 8 $ 8 5.85 After 1 to 5 years 112 $ 4 116 7.63 $ 834 $ 7 $ (1) $ 840 7.02 After 5 to 10 years 13,211 576 13,787 7.29 8,088 40 (13) 8,115 6.22 After 10 years 8,030 172 $ (6) 8,196 6.95 18,829 335 (53) 19,111 7.00 21,361 752 (6) 22,107 7.16 27,751 382 (67) 28,066 6.77 GNMA certificates: After 5 to 10 years  4,605 101 4,706 6.39 4,484 37 (118) 4,403 6.22 After 10 years 2,515,953 12,672 (6,539) 2,522,086 6.52 1,291,460 8,713 (21,349) 1,278,824 6.50 2,520,558 12,773 (6,539) 2,526,792 6.52 1,295,944 8,750 (21,467) 1,283,227 6.50 FNMA certificates: After 1 to 5 years 158 4 162 6.92 375 2 377 7.29 After 5 to 10 years 124 5 129 7.32 125 1 126 6.84 After 10 years 7,095 408 7,503 7.96 9,402 270 (14) 9,658 8.16 7,377 417 7,794 7.93 9,902 273 (14) 10,161 8.11 Mortgage pass through certificates: After 10 years 1,958 38 1,996 8.70 2,286 66 2,352 8.96 Mortgage backed  securities $2,551,254 $13,980 $  (6,545) $2,558,689 6.53 $1,335,883 $9,471 $(21,548) $1,323,806 6.52 Corporate bonds: Within 1 year  $ 19,246 $ 410 $ 19,656 7.70 $  19,645 $ 84 $  19,729 7.29 After 1 to 5 years 118,919 1,770 $ (2,899) 117,790 6.68 27,416 295 $ (105) 27,606 7.97 After 5 to 10 years 114,855 77 (1,906) 113,026 7.34 10,522 98 (22) 10,598 7.21 After 10 years 18,531 328 18,859 7.35 3,211 (60) 3,151 6.31 Corporate bonds  $ 271,551 $ 2,585 $ (4,805) $ 269,331 7.08 $  60,794 $ 477 $ (187) $  61,084 7.53 Equity securities (without contractual maturity) $ 45,115 $ 4,901 $(16,189) $ 33,827 1.43 $  35,914 $2,134 $(12,542) $ 25,506 1.91 Total Investments Securities Available for Sale $3,381,379 $22,245 $(29,376) $3,374,248 5.95 $1,927,795 $14,080 $(40,212) $1,901,663 6.51 0 63 First BanCorp.> 2001