Distribution Date  0%   5%  15%  25% 40%  0%   5%   15% 25%  40% Class IO Class Z CPR Prepayment Assumption Rates Initial Percent . . . . . . .                   100  100  100  100  100     100   100   100  100  100 May 2009 . . . . . . . . . . . 97 96 94    92     88     105   105   105  105  105 May 2010 . . . . . . . . . . . 93 90 83    76     67     109   109   109  109  109 May 2011 . . . . . . . . . . . 90 83 69    57     42     114   114   114  114  114 May 2012 . . . . . . . . . . . 87 76 57    42     26     120   120   120  120  120 May 2013 . . . . . . . . . . . 84 70 48    32     16     125   125   125  125  125 May 2014 . . . . . . . . . . . 81 64 39    23     10     131   131   131  131  131 May 2015 . . . . . . . . . . . 79 59 32    17       6      137   137  137   137  137 May 2016 . . . . . . . . . . . 77 55 27    12       4      143   143  143   143  128 May 2017 . . . . . . . . . . . 75 51 22      9       2      150    150  150   150    80 May 2018 . . . . . . . . . . . 72 47 18      7       1      157    157  157   157    49 May 2019 . . . . . . . . . . . 70 43 15      5       1      164    164  164   164    29 May 2020 . . . . . . . . . . . 68 39 12      4       0      171    171  171   128    17 May 2021 . . . . . . . . . . . 65 36 10      3       0      179    179  179     93    10 May 2022 . . . . . . . . . . . 63 33 8      2       0       188   188   188     67      6 May 2023 . . . . . . . . . . . 60 30 7      1       0       196   196   196     49      3 May 2024 . . . . . . . . . . . 57 27 6      1       0       205   205   201     35      2 May 2025 . . . . . . . . . . . 55 25 5      1       0       215   215   163     25      1 May 2026 . . . . . . . . . . . 52 22 4      0       0       224   224   132     18      1 May 2027 . . . . . . . . . . . 49 20 3      0       0       235   235   106     13      0 May 2028 . . . . . . . . . . . 46 18 2      0       0       246   246     85 9 0 May 2029 . . . . . . . . . . . 43 16 2      0       0       257   257     68 6 0 May 2030 . . . . . . . . . . . 40 14 1      0       0       269   269     54 4 0 May 2031 . . . . . . . . . . . 37 12 1      0       0       281   281     42 3 0 May 2032 . . . . . . . . . . . 34 11 1      0       0       294   294     33 2 0 May 2033 . . . . . . . . . . . 31 9 1      0       0       307   307     25 1 0 May 2034 . . . . . . . . . . . 27 8 1      0       0       321   286     19 1 0 May 2035 . . . . . . . . . . . 24 7 0      0       0       336   241     15 1 0 May 2036 . . . . . . . . . . . 21 6 0      0       0       352   200     11 0 0 May 2037 . . . . . . . . . . . 18 4 0      0       0       368   163 8 0 0 May 2038 . . . . . . . . . . . 15 4 0      0       0       385   128 5 0 0 May 2039 . . . . . . . . . . . 13 3 0      0       0       402   102 4 0 0 May 2040 . . . . . . . . . . . 10 2 0 0 0 371 78 3 0 0 May 2041 . . . . . . . . . . . 8 2 0 0 0 274 55 2 0 0 May 2042 . . . . . . . . . . . 5 1 0 0 0 176 33 1 0 0 May 2043 . . . . . . . . . . . 2 0 0 0 0 87 16 0 0 0 May 2044 . . . . . . . . . . . 2 0 0 0 0 66 11 0 0 0 May 2045 . . . . . . . . . . . 1 0 0 0 0 45 7 0 0 0 May 2046 . . . . . . . . . . . 1 0 0 0 0 21 3 0 0 0 May 2047 . . . . . . . . . . . 0 0 0 0 0 5 1 0 0 0 May 2048 . . . . . . . . . . . 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years). . . . . . . . .               18.0  11.3   6.2   4.3   3.1     34.1   29.7  20.3  14.3   9.8 Yield Considerations An investor seeking to maximize yield should make a decision whether to invest in any Class based on the anticipated yield of that Class resulting from its purchase price and the investor’s own projection of Mortgage Loan prepayment rates under a variety of scenarios.  No representation is made regarding Mortgage Loan prepayment rates or the yield of any Class. Prepayments: Effect on Yields The yields to investors will be sensitive in varying degrees to the rate of prepayments on the Mortgage Loans. • In the case of Regular Securities purchased at a premium (especially the Interest Only Class), faster than anticipated rates of principal payments could result in actual yields to investors that are lower than the anticipated yields. • Investors in the Interest Only Class should also consider the risk that rapid rates of principal payments could result in the failure of investors to recover fully their investments. • In the case of Regular Securities purchased at a discount, slower than anticipated rates of principal payments could result in actual yields to investors that are lower than the anticipated yields. See “Risk Factors — Rates of principal payments can reduce your yield” in this Supplement. S-20