Security Group 8 PSA Prepayment Assumption Rates Classes IM and TU Class TH Class TM Distribution Date 0% 165% 203% 400% 500% 0% 165% 203% 400% 500% 0% 165% 203% 400% 500% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 October 2008.................... 98 90 90 90 90 100 100 92 0 0 100 100 76 31 0 October 2009.................... 95 75 75 75 75 100 100 79 0 0 100 100 36 0 0 October 2010.................... 92 59 59 59 52 100 100 67 0 0 100 100 0 0 0 October 2011.................... 90 45 45 44 30 100 100 59 0 0 100 100 0 0 0 October 2012.................... 86 32 32 27 14 100 100 53 0 0 100 100 0 0 0 October 2013.................... 83 20 20 15 3 100 100 50 0 0 100 100 0 0 0 October 2014.................... 80 10 10 5 0 100 100 49 0 0 100 100 0 0 0 October 2015.................... 76 0 0 0 0 100 100 49 0 0 100 97 0 0 0 October 2016.................... 72 0 0 0 0 100 100 49 0 0 100 0 0 0 0 October 2017.................... 68 0 0 0 0 100 100 49 0 0 100 0 0 0 0 October 2018.................... 63 0 0 0 0 100 100 49 0 0 100 0 0 0 0 October 2019.................... 58 0 0 0 0 100 100 27 0 0 100 0 0 0 0 October 2020.................... 53 0 0 0 0 100 72 0 0 0 100 0 0 0 0 October 2021.................... 48 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2022.................... 42 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2023.................... 36 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2024.................... 29 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2025.................... 22 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2026.................... 14 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2027.................... 6 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2028.................... 0 0 0 0 0 100 0 0 0 0 32 0 0 0 0 October 2029.................... 0 0 0 0 0 100 0 0 0 0 0 0 0 0 0 October 2030.................... 0 0 0 0 0 100 0 0 0 0 0 0 0 0 0 October 2031.................... 0 0 0 0 0 100 0 0 0 0 0 0 0 0 0 October 2032.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2033.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2034.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2035.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2036.................... 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 Weighted Average Life (years)  ..................   12.6 3.8 3.8 3.7 3.2 24.6 13.3 7.2 0.5 0.4 20.9 8.2 1.6 0.9 0.7 PSA Prepayment Assumption Rates Class TN Class ZT Distribution Date 0% 165% 203% 400% 500% 0% 165% 203% 400% 500% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 October 2008....................    100 100 100 100 91 106 106 106 106 106 October 2009....................    100 100 100 56 24 112 112 112 112 112 October 2010....................    100 100 100 17 0 118 118 118 118 118 October 2011....................    100 100 96 0 0 125 125 125 125 125 October 2012....................    100 100 93 0 0 132 132 132 132 132 October 2013....................    100 100 92 0 0 139 139 139 139 139 October 2014....................    100 100 91 0 0 147 147 147 147 110 October 2015....................    100 100 90 0 0 155 155 155 136 76 October 2016....................    100 85 62 0 0 164 164 164 101 52 October 2017....................    100 59 38 0 0 173 173 173 75 35 October 2018....................    100 36 15 0 0 183 183 183 55 24 October 2019....................    100 14 0 0 0 193 193 193 41 16 October 2020....................    100 0 0 0 0 204 204 175 30 11 October 2021....................    100 0 0 0 0 216 208 148 22 7 October 2022....................    100 0 0 0 0 228 180 125 16 5 October 2023....................    100 0 0 0 0 241 155 105 12 3 October 2024....................    100 0 0 0 0 254 133 87 8 2 October 2025....................    100 0 0 0 0 269 113 72 6 1 October 2026....................    100 0 0 0 0 284 95 60 4 1 October 2027....................    100 0 0 0 0 300 80 49 3 1 October 2028....................    100 0 0 0 0 317 66 39 2 0 October 2029.................... 75 0 0 0 0 334 54 31 1 0 October 2030.................... 43 0 0 0 0 353 43 24 1 0 October 2031.................... 10 0 0 0 0 373 34 18 1 0 October 2032.................... 0 0 0 0 0 384 25 14 0 0 October 2033.................... 0 0 0 0 0 318 18 9 0 0 October 2034.................... 0 0 0 0 0 246 12 6 0 0 October 2035.................... 0 0 0 0 0 170 6 3 0 0 October 2036.................... 0 0 0 0 0 88 1 1 0 0 October 2037.................... 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years)  ..................   22.8 10.5 9.3 2.2 1.6 27.6 19.2 17.5 10.9 9.0 S-30