| 2023-12-31 | Rank |
| U.S. Government agency obligations | $104,662,000,000 | 8 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $74,440,000,000 | 4 |
| Issued by G.N.M.A. | $25,829,000,000 | 5 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,147,000,000 | 37 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,989,000,000 | 16 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $257,000,000 | 67 |
| 2023-09-30 | Rank |
| U.S. Government agency obligations | $96,514,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $75,774,000,000 | 4 |
| Issued by G.N.M.A. | $16,407,000,000 | 5 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,184,000,000 | 37 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,889,000,000 | 17 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $260,000,000 | 67 |
| 2023-06-30 | Rank |
| U.S. Government agency obligations | $93,539,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $77,974,000,000 | 3 |
| Issued by G.N.M.A. | $11,040,000,000 | 8 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,294,000,000 | 34 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,961,000,000 | 17 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $270,000,000 | 64 |
| 2023-03-31 | Rank |
| U.S. Government agency obligations | $95,059,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $80,027,000,000 | 3 |
| Issued by G.N.M.A. | $10,503,000,000 | 8 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,409,000,000 | 34 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,825,000,000 | 18 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $295,000,000 | 64 |
| 2022-12-31 | Rank |
| U.S. Government agency obligations | $96,114,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $81,577,000,000 | 3 |
| Issued by G.N.M.A. | $10,070,000,000 | 8 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,473,000,000 | 38 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,688,000,000 | 16 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $306,000,000 | 67 |
| 2022-09-30 | Rank |
| U.S. Government agency obligations | $95,003,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $83,557,000,000 | 3 |
| Issued by G.N.M.A. | $6,874,000,000 | 10 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,590,000,000 | 36 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,662,000,000 | 16 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $320,000,000 | 72 |
| 2022-06-30 | Rank |
| U.S. Government agency obligations | $95,694,000,000 | 8 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $86,752,000,000 | 5 |
| Issued by G.N.M.A. | $4,197,000,000 | 16 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,784,000,000 | 37 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,500,000,000 | 19 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $461,000,000 | 65 |
| 2022-03-31 | Rank |
| U.S. Government agency obligations | $100,283,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $91,190,000,000 | 5 |
| Issued by G.N.M.A. | $3,545,000,000 | 16 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $3,008,000,000 | 36 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,523,000,000 | 21 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,017,000,000 | 43 |
| 2021-12-31 | Rank |
| U.S. Government agency obligations | $90,787,000,000 | 8 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $82,767,000,000 | 5 |
| Issued by G.N.M.A. | $1,974,000,000 | 19 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $3,311,000,000 | 35 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,609,000,000 | 20 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,126,000,000 | 39 |
| 2021-09-30 | Rank |
| U.S. Government agency obligations | $97,295,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $88,654,000,000 | 5 |
| Issued by G.N.M.A. | $2,159,000,000 | 19 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $3,614,000,000 | 32 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,659,000,000 | 18 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,209,000,000 | 36 |
| 2021-06-30 | Rank |
| U.S. Government agency obligations | $97,306,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $88,648,000,000 | 5 |
| Issued by G.N.M.A. | $1,735,000,000 | 23 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $3,958,000,000 | 30 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,667,000,000 | 18 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,298,000,000 | 35 |
| 2021-03-31 | Rank |
| U.S. Government agency obligations | $99,548,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $89,370,000,000 | 4 |
| Issued by G.N.M.A. | $2,322,000,000 | 17 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $4,351,000,000 | 26 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,991,000,000 | 16 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,464,000,000 | 29 |
| 2020-12-31 | Rank |
| U.S. Government agency obligations | $85,266,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $75,361,000,000 | 5 |
| Issued by G.N.M.A. | $1,862,000,000 | 24 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $4,743,000,000 | 26 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,690,000,000 | 17 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,559,000,000 | 30 |
| 2020-09-30 | Rank |
| U.S. Government agency obligations | $81,276,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $70,691,000,000 | 5 |
| Issued by G.N.M.A. | $2,109,000,000 | 25 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $5,173,000,000 | 25 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,706,000,000 | 15 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,500,000,000 | 28 |
| 2020-06-30 | Rank |
| U.S. Government agency obligations | $89,388,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $73,579,000,000 | 5 |
| Issued by G.N.M.A. | $3,204,000,000 | 17 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $5,897,000,000 | 21 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,707,000,000 | 15 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,902,000,000 | 23 |
| 2020-03-31 | Rank |
| U.S. Government agency obligations | $86,231,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $67,770,000,000 | 4 |
| Issued by G.N.M.A. | $4,417,000,000 | 14 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $6,377,000,000 | 20 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,713,000,000 | 15 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,851,000,000 | 24 |
| 2019-12-31 | Rank |
| U.S. Government agency obligations | $78,076,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $60,654,000,000 | 4 |
| Issued by G.N.M.A. | $2,368,000,000 | 24 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $6,533,000,000 | 19 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,710,000,000 | 12 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,492,000,000 | 26 |
| 2019-09-30 | Rank |
| U.S. Government agency obligations | $81,047,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $60,089,000,000 | 4 |
| Issued by G.N.M.A. | $3,036,000,000 | 22 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $7,080,000,000 | 18 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,786,000,000 | 12 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,789,000,000 | 15 |
| 2019-06-30 | Rank |
| U.S. Government agency obligations | $76,266,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $53,488,000,000 | 4 |
| Issued by G.N.M.A. | $3,354,000,000 | 21 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $7,065,000,000 | 18 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,862,000,000 | 12 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $3,050,000,000 | 14 |
| 2019-03-31 | Rank |
| U.S. Government agency obligations | $77,867,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $52,933,000,000 | 4 |
| Issued by G.N.M.A. | $4,212,000,000 | 15 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $7,232,000,000 | 19 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,926,000,000 | 10 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $3,180,000,000 | 12 |
| 2018-12-31 | Rank |
| U.S. Government agency obligations | $78,208,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $52,553,000,000 | 4 |
| Issued by G.N.M.A. | $4,205,000,000 | 15 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $7,277,000,000 | 15 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,799,000,000 | 10 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $3,222,000,000 | 12 |
| 2018-09-30 | Rank |
| U.S. Government agency obligations | $71,983,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $46,690,000,000 | 5 |
| Issued by G.N.M.A. | $4,313,000,000 | 15 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $7,982,000,000 | 14 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $979,000,000 | 16 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,466,000,000 | 14 |
| 2018-06-30 | Rank |
| U.S. Government agency obligations | $71,510,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | NA | NA |
| Issued by U.S. government enterprises (GSEs) | NA | NA |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $43,983,000,000 | 5 |
| Issued by G.N.M.A. | $4,440,000,000 | 15 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $8,873,000,000 | 12 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $943,000,000 | 15 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,899,000,000 | 18 |
| 2018-03-31 | Rank |
| U.S. Government agency obligations | $67,713,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $101,000,000 | 54 |
| Issued by U.S. government enterprises (GSEs) | $10,412,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $43,930,000,000 | 5 |
| Issued by G.N.M.A. | $1,524,000,000 | 28 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $9,063,000,000 | 10 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,031,000,000 | 12 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,652,000,000 | 19 |
| 2017-12-31 | Rank |
| U.S. Government agency obligations | $76,030,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $103,000,000 | 54 |
| Issued by U.S. government enterprises (GSEs) | $10,590,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $51,044,000,000 | 4 |
| Issued by G.N.M.A. | $1,617,000,000 | 28 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $9,114,000,000 | 10 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,630,000,000 | 9 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,932,000,000 | 16 |
| 2017-09-30 | Rank |
| U.S. Government agency obligations | $76,498,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $104,000,000 | 57 |
| Issued by U.S. government enterprises (GSEs) | $10,647,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $50,809,000,000 | 4 |
| Issued by G.N.M.A. | $1,693,000,000 | 27 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $9,490,000,000 | 10 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,695,000,000 | 9 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,060,000,000 | 15 |
| 2017-06-30 | Rank |
| U.S. Government agency obligations | $77,224,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $106,000,000 | 51 |
| Issued by U.S. government enterprises (GSEs) | $10,093,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $52,022,000,000 | 4 |
| Issued by G.N.M.A. | $1,645,000,000 | 29 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $9,490,000,000 | 10 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,688,000,000 | 10 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,180,000,000 | 14 |
| 2017-03-31 | Rank |
| U.S. Government agency obligations | $69,359,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $127,000,000 | 41 |
| Issued by U.S. government enterprises (GSEs) | $9,732,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $46,045,000,000 | 4 |
| Issued by G.N.M.A. | $331,000,000 | 48 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $9,229,000,000 | 10 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,636,000,000 | 10 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,259,000,000 | 13 |
| 2016-12-31 | Rank |
| U.S. Government agency obligations | $70,504,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $126,000,000 | 38 |
| Issued by U.S. government enterprises (GSEs) | $9,763,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $46,247,000,000 | 4 |
| Issued by G.N.M.A. | $351,000,000 | 48 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $9,571,000,000 | 10 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,964,000,000 | 8 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,482,000,000 | 12 |
| 2016-09-30 | Rank |
| U.S. Government agency obligations | $70,829,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $128,000,000 | 35 |
| Issued by U.S. government enterprises (GSEs) | $10,776,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $44,255,000,000 | 4 |
| Issued by G.N.M.A. | $988,000,000 | 30 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $10,122,000,000 | 11 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $2,015,000,000 | 8 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,545,000,000 | 11 |
| 2016-06-30 | Rank |
| U.S. Government agency obligations | $73,565,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $128,000,000 | 35 |
| Issued by U.S. government enterprises (GSEs) | $10,964,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $44,304,000,000 | 4 |
| Issued by G.N.M.A. | $2,390,000,000 | 22 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $10,954,000,000 | 9 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $2,021,000,000 | 8 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,804,000,000 | 10 |
| 2016-03-31 | Rank |
| U.S. Government agency obligations | $72,113,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $129,000,000 | 36 |
| Issued by U.S. government enterprises (GSEs) | $10,202,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $43,152,000,000 | 4 |
| Issued by G.N.M.A. | $2,254,000,000 | 23 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $11,508,000,000 | 8 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $2,036,000,000 | 7 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,832,000,000 | 10 |
| 2015-12-31 | Rank |
| U.S. Government agency obligations | $67,119,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $127,000,000 | 31 |
| Issued by U.S. government enterprises (GSEs) | $9,948,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $39,683,000,000 | 4 |
| Issued by G.N.M.A. | $1,020,000,000 | 29 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $11,888,000,000 | 8 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,696,000,000 | 9 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,757,000,000 | 9 |
| 2015-09-30 | Rank |
| U.S. Government agency obligations | $63,536,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $132,000,000 | 32 |
| Issued by U.S. government enterprises (GSEs) | $9,972,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $36,612,000,000 | 4 |
| Issued by G.N.M.A. | $848,000,000 | 28 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $12,427,000,000 | 8 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,211,000,000 | 10 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,334,000,000 | 9 |
| 2015-06-30 | Rank |
| U.S. Government agency obligations | $59,745,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $133,000,000 | 31 |
| Issued by U.S. government enterprises (GSEs) | $9,555,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $33,482,000,000 | 4 |
| Issued by G.N.M.A. | $411,000,000 | 45 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $12,792,000,000 | 8 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,179,000,000 | 10 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,193,000,000 | 8 |
| 2015-03-31 | Rank |
| U.S. Government agency obligations | $56,771,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $134,000,000 | 31 |
| Issued by U.S. government enterprises (GSEs) | $9,115,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $29,358,000,000 | 5 |
| Issued by G.N.M.A. | $599,000,000 | 34 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,851,000,000 | 7 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,465,000,000 | 9 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,249,000,000 | 8 |
| 2014-12-31 | Rank |
| U.S. Government agency obligations | $57,181,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $6,000,000 | 600 |
| Issued by U.S. government enterprises (GSEs) | $12,808,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $27,399,000,000 | 5 |
| Issued by G.N.M.A. | $466,000,000 | 41 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $12,741,000,000 | 8 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,568,000,000 | 9 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,193,000,000 | 8 |
| 2014-09-30 | Rank |
| U.S. Government agency obligations | $60,969,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $6,000,000 | 593 |
| Issued by U.S. government enterprises (GSEs) | $16,380,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $27,374,000,000 | 5 |
| Issued by G.N.M.A. | $794,000,000 | 28 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $12,913,000,000 | 8 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,216,000,000 | 11 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,286,000,000 | 8 |
| 2014-06-30 | Rank |
| U.S. Government agency obligations | $57,332,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $7,000,000 | 515 |
| Issued by U.S. government enterprises (GSEs) | $15,004,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $24,335,000,000 | 5 |
| Issued by G.N.M.A. | $1,073,000,000 | 22 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,279,000,000 | 6 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,597,000,000 | 10 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $2,037,000,000 | 9 |
| 2014-03-31 | Rank |
| U.S. Government agency obligations | $55,450,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $7,000,000 | 519 |
| Issued by U.S. government enterprises (GSEs) | $14,304,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $23,292,000,000 | 5 |
| Issued by G.N.M.A. | $1,095,000,000 | 19 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,065,000,000 | 6 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,838,000,000 | 6 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,849,000,000 | 9 |
| 2013-12-31 | Rank |
| U.S. Government agency obligations | $59,575,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $8,000,000 | 463 |
| Issued by U.S. government enterprises (GSEs) | $18,200,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $22,976,000,000 | 5 |
| Issued by G.N.M.A. | $1,156,000,000 | 22 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,350,000,000 | 6 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $2,081,000,000 | 5 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,804,000,000 | 9 |
| 2013-09-30 | Rank |
| U.S. Government agency obligations | $63,343,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $8,000,000 | 457 |
| Issued by U.S. government enterprises (GSEs) | $20,302,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $25,014,000,000 | 5 |
| Issued by G.N.M.A. | $1,217,000,000 | 18 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,710,000,000 | 6 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,394,000,000 | 7 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,698,000,000 | 10 |
| 2013-06-30 | Rank |
| U.S. Government agency obligations | $69,893,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $9,000,000 | 424 |
| Issued by U.S. government enterprises (GSEs) | $21,465,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $29,390,000,000 | 5 |
| Issued by G.N.M.A. | $1,722,000,000 | 14 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $14,267,000,000 | 7 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,375,000,000 | 6 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,665,000,000 | 9 |
| 2013-03-31 | Rank |
| U.S. Government agency obligations | $69,845,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $11,000,000 | 351 |
| Issued by U.S. government enterprises (GSEs) | $22,245,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $29,252,000,000 | 5 |
| Issued by G.N.M.A. | $1,853,000,000 | 12 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,831,000,000 | 7 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,423,000,000 | 6 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $1,230,000,000 | 9 |
| 2012-12-31 | Rank |
| U.S. Government agency obligations | $72,635,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $12,000,000 | 304 |
| Issued by U.S. government enterprises (GSEs) | $26,409,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $28,623,000,000 | 4 |
| Issued by G.N.M.A. | $1,438,000,000 | 13 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,818,000,000 | 8 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,405,000,000 | 6 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $930,000,000 | 6 |
| 2012-09-30 | Rank |
| U.S. Government agency obligations | $70,039,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $13,000,000 | 244 |
| Issued by U.S. government enterprises (GSEs) | $27,086,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $25,835,000,000 | 5 |
| Issued by G.N.M.A. | $1,359,000,000 | 17 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,794,000,000 | 7 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,342,000,000 | 5 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $610,000,000 | 11 |
| 2012-06-30 | Rank |
| U.S. Government agency obligations | $76,721,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $13,000,000 | 231 |
| Issued by U.S. government enterprises (GSEs) | $32,602,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $28,156,000,000 | 5 |
| Issued by G.N.M.A. | $1,014,000,000 | 23 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $13,073,000,000 | 7 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,254,000,000 | 5 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $609,000,000 | 8 |
| 2012-03-31 | Rank |
| U.S. Government agency obligations | $65,497,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $13,000,000 | 214 |
| Issued by U.S. government enterprises (GSEs) | $22,386,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $30,099,000,000 | 4 |
| Issued by G.N.M.A. | $989,000,000 | 23 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $10,173,000,000 | 10 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,229,000,000 | 5 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $608,000,000 | 8 |
| 2011-12-31 | Rank |
| U.S. Government agency obligations | $65,723,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $14,000,000 | 162 |
| Issued by U.S. government enterprises (GSEs) | $21,973,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $31,352,000,000 | 4 |
| Issued by G.N.M.A. | $1,643,000,000 | 12 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $9,056,000,000 | 11 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $1,222,000,000 | 2 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $463,000,000 | 6 |
| 2011-09-30 | Rank |
| U.S. Government agency obligations | $64,866,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $15,000,000 | 135 |
| Issued by U.S. government enterprises (GSEs) | $23,813,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $30,274,000,000 | 4 |
| Issued by G.N.M.A. | $1,699,000,000 | 11 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $7,813,000,000 | 11 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $931,000,000 | 2 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $321,000,000 | 7 |
| 2011-06-30 | Rank |
| U.S. Government agency obligations | $73,061,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $15,000,000 | 130 |
| Issued by U.S. government enterprises (GSEs) | $37,610,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $26,429,000,000 | 4 |
| Issued by G.N.M.A. | $2,118,000,000 | 9 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $5,919,000,000 | 15 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $844,000,000 | 1 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $126,000,000 | 12 |
| 2011-03-31 | Rank |
| U.S. Government agency obligations | $78,895,000,000 | 3 |
| Non-mortgage backed: |
| U.S. government agencies | $18,000,000 | 104 |
| Issued by U.S. government enterprises (GSEs) | $46,710,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $24,681,000,000 | 4 |
| Issued by G.N.M.A. | $2,095,000,000 | 8 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $4,705,000,000 | 16 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | $644,000,000 | 3 |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | $42,000,000 | 15 |
| 2010-12-31 | Rank |
| U.S. Government agency obligations | $58,238,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $18,000,000 | 101 |
| Issued by U.S. government enterprises (GSEs) | $35,696,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $16,465,000,000 | 4 |
| Issued by G.N.M.A. | $2,598,000,000 | 7 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $3,461,000,000 | 23 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2010-09-30 | Rank |
| U.S. Government agency obligations | $62,071,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $19,000,000 | 92 |
| Issued by U.S. government enterprises (GSEs) | $40,424,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $15,802,000,000 | 5 |
| Issued by G.N.M.A. | $2,715,000,000 | 7 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $3,111,000,000 | 23 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2010-06-30 | Rank |
| U.S. Government agency obligations | $56,932,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $20,000,000 | 82 |
| Issued by U.S. government enterprises (GSEs) | $37,366,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $14,308,000,000 | 8 |
| Issued by G.N.M.A. | $2,731,000,000 | 7 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,507,000,000 | 27 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2010-03-31 | Rank |
| U.S. Government agency obligations | $47,245,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $21,000,000 | 60 |
| Issued by U.S. government enterprises (GSEs) | $27,669,000,000 | 1 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $15,892,000,000 | 5 |
| Issued by G.N.M.A. | $1,137,000,000 | 14 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,526,000,000 | 25 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2009-12-31 | Rank |
| U.S. Government agency obligations | $37,053,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $27,000,000 | 45 |
| Issued by U.S. government enterprises (GSEs) | $17,466,000,000 | 2 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $15,912,000,000 | 6 |
| Issued by G.N.M.A. | $1,139,000,000 | 17 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,509,000,000 | 25 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2009-09-30 | Rank |
| U.S. Government agency obligations | $30,935,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $27,000,000 | 39 |
| Issued by U.S. government enterprises (GSEs) | $8,710,000,000 | 3 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $18,229,000,000 | 6 |
| Issued by G.N.M.A. | $1,251,000,000 | 15 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,718,000,000 | 20 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2009-06-30 | Rank |
| U.S. Government agency obligations | $35,138,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $23,000,000 | 42 |
| Issued by U.S. government enterprises (GSEs) | $8,128,000,000 | 3 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $23,594,000,000 | 5 |
| Issued by G.N.M.A. | $1,347,000,000 | 11 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,046,000,000 | 23 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2009-03-31 | Rank |
| U.S. Government agency obligations | $26,349,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $478,000,000 | 4 |
| Issued by U.S. government enterprises (GSEs) | $141,000,000 | 137 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $21,966,000,000 | 4 |
| Issued by G.N.M.A. | $1,480,000,000 | 10 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,284,000,000 | 21 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2008-12-31 | Rank |
| U.S. Government agency obligations | $22,119,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $25,000,000 | 29 |
| Issued by U.S. government enterprises (GSEs) | $47,000,000 | 516 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $16,505,000,000 | 4 |
| Issued by G.N.M.A. | $3,172,000,000 | 4 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $2,370,000,000 | 20 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2008-09-30 | Rank |
| U.S. Government agency obligations | $16,727,000,000 | 8 |
| Non-mortgage backed: |
| U.S. government agencies | $25,000,000 | 30 |
| Issued by U.S. government enterprises (GSEs) | $244,000,000 | 69 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $12,872,000,000 | 6 |
| Issued by G.N.M.A. | $3,265,000,000 | 4 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $321,000,000 | 77 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2008-06-30 | Rank |
| U.S. Government agency obligations | $19,624,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $26,000,000 | 34 |
| Issued by U.S. government enterprises (GSEs) | $525,000,000 | 38 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $15,589,000,000 | 6 |
| Issued by G.N.M.A. | $3,151,000,000 | 3 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $333,000,000 | 78 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2008-03-31 | Rank |
| U.S. Government agency obligations | $18,618,000,000 | 9 |
| Non-mortgage backed: |
| U.S. government agencies | $27,000,000 | 34 |
| Issued by U.S. government enterprises (GSEs) | $1,111,000,000 | 18 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $15,255,000,000 | 6 |
| Issued by G.N.M.A. | $1,881,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $344,000,000 | 76 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2007-12-31 | Rank |
| U.S. Government agency obligations | $22,907,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $28,000,000 | 35 |
| Issued by U.S. government enterprises (GSEs) | $2,416,000,000 | 10 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $18,158,000,000 | 5 |
| Issued by G.N.M.A. | $1,948,000,000 | 3 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $357,000,000 | 73 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2007-09-30 | Rank |
| U.S. Government agency obligations | $32,117,000,000 | 4 |
| Non-mortgage backed: |
| U.S. government agencies | $716,000,000 | 4 |
| Issued by U.S. government enterprises (GSEs) | $1,689,000,000 | 17 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $27,540,000,000 | 5 |
| Issued by G.N.M.A. | $1,803,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $369,000,000 | 71 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2007-06-30 | Rank |
| U.S. Government agency obligations | $50,547,000,000 | 5 |
| Non-mortgage backed: |
| U.S. government agencies | $712,000,000 | 5 |
| Issued by U.S. government enterprises (GSEs) | $3,218,000,000 | 10 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $44,401,000,000 | 5 |
| Issued by G.N.M.A. | $1,832,000,000 | 3 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $384,000,000 | 79 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2007-03-31 | Rank |
| U.S. Government agency obligations | $82,950,000,000 | 2 |
| Non-mortgage backed: |
| U.S. government agencies | $799,000,000 | 5 |
| Issued by U.S. government enterprises (GSEs) | $3,471,000,000 | 10 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $76,392,000,000 | 3 |
| Issued by G.N.M.A. | $1,927,000,000 | 3 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $361,000,000 | 82 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2006-12-31 | Rank |
| U.S. Government agency obligations | $73,612,000,000 | 3 |
| Non-mortgage backed: |
| U.S. government agencies | $200,000,000 | 7 |
| Issued by U.S. government enterprises (GSEs) | $3,935,000,000 | 8 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $66,767,000,000 | 4 |
| Issued by G.N.M.A. | $2,335,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $375,000,000 | 81 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2006-09-30 | Rank |
| U.S. Government agency obligations | $29,187,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $178,000,000 | 10 |
| Issued by U.S. government enterprises (GSEs) | $4,201,000,000 | 8 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $22,580,000,000 | 5 |
| Issued by G.N.M.A. | $2,228,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 3,319 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2006-06-30 | Rank |
| U.S. Government agency obligations | $11,735,000,000 | 12 |
| Non-mortgage backed: |
| U.S. government agencies | $251,000,000 | 5 |
| Issued by U.S. government enterprises (GSEs) | $3,970,000,000 | 8 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $5,188,000,000 | 10 |
| Issued by G.N.M.A. | $2,326,000,000 | 3 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 3,314 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2006-03-31 | Rank |
| U.S. Government agency obligations | $11,075,000,000 | 15 |
| Non-mortgage backed: |
| U.S. government agencies | $164,000,000 | 9 |
| Issued by U.S. government enterprises (GSEs) | $4,843,000,000 | 7 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $3,414,000,000 | 13 |
| Issued by G.N.M.A. | $2,654,000,000 | 3 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 3,310 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2005-12-31 | Rank |
| U.S. Government agency obligations | $12,257,000,000 | 14 |
| Non-mortgage backed: |
| U.S. government agencies | $141,000,000 | 12 |
| Issued by U.S. government enterprises (GSEs) | $5,539,000,000 | 6 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $3,594,000,000 | 13 |
| Issued by G.N.M.A. | $2,983,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 3,332 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2005-09-30 | Rank |
| U.S. Government agency obligations | $11,410,000,000 | 15 |
| Non-mortgage backed: |
| U.S. government agencies | $106,000,000 | 13 |
| Issued by U.S. government enterprises (GSEs) | $5,756,000,000 | 6 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $2,261,000,000 | 26 |
| Issued by G.N.M.A. | $3,287,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 3,344 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2005-06-30 | Rank |
| U.S. Government agency obligations | $14,508,000,000 | 11 |
| Non-mortgage backed: |
| U.S. government agencies | $256,000,000 | 7 |
| Issued by U.S. government enterprises (GSEs) | $7,950,000,000 | 3 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $2,656,000,000 | 19 |
| Issued by G.N.M.A. | $3,645,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $1,000,000 | 2,318 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2005-03-31 | Rank |
| U.S. Government agency obligations | $15,730,000,000 | 10 |
| Non-mortgage backed: |
| U.S. government agencies | $242,000,000 | 8 |
| Issued by U.S. government enterprises (GSEs) | $8,135,000,000 | 3 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $3,343,000,000 | 16 |
| Issued by G.N.M.A. | $4,009,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $1,000,000 | 2,371 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2004-12-31 | Rank |
| U.S. Government agency obligations | $16,432,000,000 | 9 |
| Non-mortgage backed: |
| U.S. government agencies | $181,000,000 | 10 |
| Issued by U.S. government enterprises (GSEs) | $8,952,000,000 | 3 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $2,031,000,000 | 30 |
| Issued by G.N.M.A. | $5,267,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $1,000,000 | 2,419 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2004-09-30 | Rank |
| U.S. Government agency obligations | $18,935,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $255,000,000 | 9 |
| Issued by U.S. government enterprises (GSEs) | $10,641,000,000 | 2 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $711,000,000 | 76 |
| Issued by G.N.M.A. | $7,327,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $1,000,000 | 2,427 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2004-06-30 | Rank |
| U.S. Government agency obligations | $23,681,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $244,000,000 | 8 |
| Issued by U.S. government enterprises (GSEs) | $11,654,000,000 | 2 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $1,198,000,000 | 53 |
| Issued by G.N.M.A. | $10,584,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $1,000,000 | 2,462 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2004-03-31 | Rank |
| U.S. Government agency obligations | $24,905,000,000 | 6 |
| Non-mortgage backed: |
| U.S. government agencies | $140,000,000 | 11 |
| Issued by U.S. government enterprises (GSEs) | $11,550,000,000 | 2 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $1,532,000,000 | 36 |
| Issued by G.N.M.A. | $11,682,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $1,000,000 | 2,541 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2003-12-31 | Rank |
| U.S. Government agency obligations | $22,179,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $303,000,000 | 7 |
| Issued by U.S. government enterprises (GSEs) | $9,174,000,000 | 2 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $1,151,000,000 | 51 |
| Issued by G.N.M.A. | $11,550,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $1,000,000 | 2,657 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2003-09-30 | Rank |
| U.S. Government agency obligations | $24,498,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $238,000,000 | 7 |
| Issued by U.S. government enterprises (GSEs) | $9,754,000,000 | 2 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $1,401,000,000 | 41 |
| Issued by G.N.M.A. | $13,102,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $3,000,000 | 1,898 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2003-06-30 | Rank |
| U.S. Government agency obligations | $26,796,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $194,000,000 | 7 |
| Issued by U.S. government enterprises (GSEs) | $8,340,000,000 | 3 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $1,529,000,000 | 36 |
| Issued by G.N.M.A. | $16,728,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $5,000,000 | 1,626 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2003-03-31 | Rank |
| U.S. Government agency obligations | $26,040,000,000 | 8 |
| Non-mortgage backed: |
| U.S. government agencies | $193,000,000 | 6 |
| Issued by U.S. government enterprises (GSEs) | $8,269,000,000 | 2 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $2,475,000,000 | 17 |
| Issued by G.N.M.A. | $15,097,000,000 | 2 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $6,000,000 | 1,542 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2002-12-31 | Rank |
| U.S. Government agency obligations | $22,907,000,000 | 7 |
| Non-mortgage backed: |
| U.S. government agencies | $85,000,000 | 16 |
| Issued by U.S. government enterprises (GSEs) | $6,185,000,000 | 4 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $2,732,000,000 | 17 |
| Issued by G.N.M.A. | $13,898,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $7,000,000 | 1,443 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2001-12-31 | Rank |
| U.S. Government agency obligations | $12,309,000,000 | 9 |
| Non-mortgage backed: |
| U.S. government agencies | $932,000,000 | 1 |
| Issued by U.S. government enterprises (GSEs) | $432,000,000 | 48 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $3,071,000,000 | 15 |
| Issued by G.N.M.A. | $7,775,000,000 | 1 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $99,000,000 | 249 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 2000-12-31 | Rank |
| U.S. Government agency obligations | $653,000,000 | 160 |
| Non-mortgage backed: |
| U.S. government agencies | $215,000,000 | 5 |
| Issued by U.S. government enterprises (GSEs) | $49,000,000 | 677 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $216,000,000 | 102 |
| Issued by G.N.M.A. | $56,000,000 | 171 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $117,000,000 | 191 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1999-12-31 | Rank |
| U.S. Government agency obligations | $765,000,000 | 155 |
| Non-mortgage backed: |
| U.S. government agencies | $68,000,000 | 13 |
| Issued by U.S. government enterprises (GSEs) | $34,000,000 | 1,012 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $168,000,000 | 143 |
| Issued by G.N.M.A. | $432,000,000 | 34 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $63,000,000 | 320 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1998-12-31 | Rank |
| U.S. Government agency obligations | $165,000,000 | 510 |
| Non-mortgage backed: |
| U.S. government agencies | $76,000,000 | 16 |
| Issued by U.S. government enterprises (GSEs) | $29,000,000 | 1,033 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $19,000,000 | 702 |
| Issued by G.N.M.A. | $41,000,000 | 217 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 4,565 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1997-12-31 | Rank |
| U.S. Government agency obligations | $258,000,000 | 369 |
| Non-mortgage backed: |
| U.S. government agencies | $76,000,000 | 15 |
| Issued by U.S. government enterprises (GSEs) | $27,000,000 | 1,021 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $104,000,000 | 201 |
| Issued by G.N.M.A. | $51,000,000 | 158 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 4,813 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1996-12-31 | Rank |
| U.S. Government agency obligations | $232,000,000 | 412 |
| Non-mortgage backed: |
| U.S. government agencies | $79,000,000 | 12 |
| Issued by U.S. government enterprises (GSEs) | $33,000,000 | 727 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $59,000,000 | 334 |
| Issued by G.N.M.A. | $61,000,000 | 137 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 5,273 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1995-12-31 | Rank |
| U.S. Government agency obligations | $208,000,000 | 438 |
| Non-mortgage backed: |
| U.S. government agencies | $88,000,000 | 11 |
| Issued by U.S. government enterprises (GSEs) | $40,000,000 | 503 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $1,000,000 | 4,254 |
| Issued by G.N.M.A. | $79,000,000 | 117 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $0 | 5,699 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1994-12-31 | Rank |
| U.S. Government agency obligations | $713,000,000 | 151 |
| Non-mortgage backed: |
| U.S. government agencies | $113,000,000 | 6 |
| Issued by U.S. government enterprises (GSEs) | $138,000,000 | 74 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $0 | 7,255 |
| Issued by G.N.M.A. | $89,000,000 | 111 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $373,000,000 | 97 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1993-12-31 | Rank |
| U.S. Government agency obligations | $890,000,000 | 108 |
| Non-mortgage backed: |
| U.S. government agencies | $90,000,000 | 7 |
| Issued by U.S. government enterprises (GSEs) | $125,000,000 | 58 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $44,000,000 | 393 |
| Issued by G.N.M.A. | $131,000,000 | 58 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $500,000,000 | 74 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
| 1992-12-31 | Rank |
| U.S. Government agency obligations | $851,000,000 | 107 |
| Non-mortgage backed: |
| U.S. government agencies | $116,000,000 | 5 |
| Issued by U.S. government enterprises (GSEs) | $130,000,000 | 50 |
| Residential mortgage backed: |
| Pass throughs: |
| Issued by F.N.M.A. and F.H.L.M.C. | $53,000,000 | 320 |
| Issued by G.N.M.A. | $229,000,000 | 38 |
| Collateralized mortgage obligations (CMOs) and REMICS: |
| CMOs issued by government agencies or sponsored agencies | $322,000,000 | 103 |
| Commercial mortgage-backed: |
| Commercial mortgage pass-through securities - FNMA, FHLMC, or GNMA | NA | NA |
| Other commercial MBS Issued or guaranteed by US Govrnmnt agencies or sponsored | NA | NA |
