Security Group 3 PSA Prepayment Assumption Rates Classes DI, FD, FG, FM, FN, GF, HF, IA, IB, IC, ID, IH, IL, IS, IT, IW, IX, IY, MI, NF, SD, UF and VF Classes EO, FB and SP Class JA Class JB Distribution Date 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 October 2008.................... 99 97 94 93 89 98 95 95 95 95 100 100 88 84 66 100 100 100 100 100 October 2009.................... 98 92 82 79 66 97 87 87 87 87 100 100 63 50 0 100 100 100 100 74 October 2010.................... 97 86 67 62 42 95 75 75 75 70 100 100 34 13 0 100 100 100 100 0 October 2011.................... 96 79 54 48 27 93 65 65 65 44 100 100 14 0 0 100 100 100 40 0 October 2012.................... 95 74 44 37 17 91 54 54 54 27 100 100 0 0 0 100 100 100 0 0 October 2013.................... 94 68 36 29 11 89 45 45 45 16 100 100 0 0 0 100 100 64 0 0 October 2014.................... 92 63 29 23 7 86 36 36 36 9 100 100 0 0 0 100 100 48 0 0 October 2015.................... 91 58 23 18 4 84 28 28 28 5 100 100 0 0 0 100 100 42 0 0 October 2016.................... 89 53 19 14 3 81 21 21 21 2 100 100 0 0 0 100 100 37 0 0 October 2017.................... 88 49 15 10 2 78 15 15 15 0 100 100 0 0 0 100 100 30 0 0 October 2018.................... 86 45 12 8 1 75 11 11 11 0 100 100 0 0 0 100 100 24 0 0 October 2019.................... 84 41 10 6 1 71 8 8 8 0 100 100 0 0 0 100 100 18 0 0 October 2020.................... 82 38 8 5 0 67 5 5 5 0 100 100 0 0 0 100 100 12 0 0 October 2021.................... 79 34 6 4 0 63 3 3 3 0 100 100 0 0 0 100 100 6 0 0 October 2022.................... 77 31 5 3 0 58 1 1 1 0 100 94 0 0 0 100 100 2 0 0 October 2023.................... 74 28 4 2 0 53 0 0 0 0 100 84 0 0 0 100 100 0 0 0 October 2024.................... 71 25 3 2 0 48 0 0 0 0 100 74 0 0 0 100 100 0 0 0 October 2025.................... 68 22 2 1 0 42 0 0 0 0 100 64 0 0 0 100 100 0 0 0 October 2026.................... 64 20 2 1 0 36 0 0 0 0 100 55 0 0 0 100 100 0 0 0 October 2027.................... 60 17 1 1 0 29 0 0 0 0 100 46 0 0 0 100 100 0 0 0 October 2028.................... 56 15 1 0 0 22 0 0 0 0 100 37 0 0 0 100 100 0 0 0 October 2029.................... 52 13 1 0 0 14 0 0 0 0 100 28 0 0 0 100 100 0 0 0 October 2030.................... 47 11 1 0 0 5 0 0 0 0 100 20 0 0 0 100 100 0 0 0 October 2031.................... 42 9 0 0 0 0 0 0 0 0 100 12 0 0 0 100 100 0 0 0 October 2032.................... 36 7 0 0 0 0 0 0 0 0 100 4 0 0 0 100 100 0 0 0 October 2033.................... 30 6 0 0 0 0 0 0 0 0 100 0 0 0 0 100 87 0 0 0 October 2034.................... 23 4 0 0 0 0 0 0 0 0 76 0 0 0 0 100 55 0 0 0 October 2035.................... 16 2 0 0 0 0 0 0 0 0 45 0 0 0 0 100 25 0 0 0 October 2036.................... 8 1 0 0 0 0 0 0 0 0 10 0 0 0 0 100 0 0 0 0 October 2037.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years)  ..................   20.5    11.4 5.7 5.0 3.2 15.3 6.0 6.0 6.0 4.1 27.8 19.7 2.5 2.0 1.2 29.6 27.2 8.3 3.9 2.1 PSA Prepayment Assumption Rates Class JC Classes KA and KI Class KB Class KC Distribution Date 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 October 2008....................    100 100 100 100 100 100 100 91 91 91 100 100 100 100 100 100 100 100 100 100 October 2009....................    100 100 100 100 100 100 100 72 72 72 100 100 100 100 100 100 100 100 100 100 October 2010....................    100 100 100 100 0 100 100 47 47 0 100 100 100 100 0 100 100 100 100 0 October 2011....................    100 100 100 100 0 100 100 27 27 0 100 100 100 100 0 100 100 100 100 0 October 2012....................    100 100 100 0 0 100 100 10 6 0 100 100 100 100 0 100 100 100 100 0 October 2013....................    100 100 100 0 0 100 100 0 0 0 100 100 87 0 0 100 100 100 38 0 October 2014....................    100 100 100 0 0 100 100 0 0 0 100 100 42 0 0 100 100 100 0 0 October 2015....................    100 100 100 0 0 100 99 0 0 0 100 100 17 0 0 100 100 100 0 0 October 2016....................    100 100 100 0 0 100 91 0 0 0 100 100 3 0 0 100 100 100 0 0 October 2017....................    100 100 100 0 0 100 76 0 0 0 100 100 0 0 0 100 100 76 0 0 October 2018....................    100 100 100 0 0 100 54 0 0 0 100 100 0 0 0 100 100 48 0 0 October 2019....................    100 100 100 0 0 100 29 0 0 0 100 100 0 0 0 100 100 22 0 0 October 2020....................    100 100 100 0 0 100 2 0 0 0 100 100 0 0 0 100 100 0 0 0 October 2021....................    100 100 100 0 0 100 0 0 0 0 100 0 0 0 0 100 55 0 0 0 October 2022....................    100 100 100 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2023....................    100 100 89 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2024....................    100 100 74 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2025....................    100 100 61 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2026....................    100 100 50 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2027....................    100 100 40 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2028....................    100 100 32 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2029....................    100 100 25 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2030....................    100 100 19 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2031....................    100 100 14 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2032....................    100 100 10 0 0 44 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2033....................    100 100 7 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 October 2034....................    100 100 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2035....................    100 100 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2036....................    100 84 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2037.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years)  ..................   29.9    29.3    19.8 4.7 2.2 24.9 11.0 3.0 3.0 2.1 25.7 13.5 7.0 5.4 2.6 25.9 14.0 11.0 6.0 2.7 S-25