Sensitivity of Class SM to Prepayments Assumed Price 4.234375%* PSA Prepayment Assumption Rates LIBOR 100% 275% 400% 600% 4.32% ............................................................ 54.5% 43.4% 35.1% 21.2% 5.32% ............................................................ 27.1% 16.2% 8.0%   (5.8)% 6.32% ............................................................        (0.2)%        (10.9)%        (19.0)%      (32.8)% 6.70% and above ........................................ ** ** ** ** Sensitivity of Class SN to Prepayments Assumed Price 4.234375%* PSA Prepayment Assumption Rates LIBOR 100% 275% 400% 600% 4.32% ............................................................ 54.5% 43.4% 35.1% 21.2% 5.32% ............................................................ 27.1% 16.2% 8.0%   (5.8)% 6.32% ............................................................   (0.2)%   (10.9)%   (19.0)%   (32.8)% 6.70% and above ........................................ ** ** ** ** SECURITY GROUP 2 Sensitivity of Class AO to Prepayments Assumed Price 49.18750% PSA Prepayment Assumption Rates 100% 180% 250% 400% 2.9% 4.3% 39.9% 139.4% Sensitivity of Class CO to Prepayments Assumed Price 54.96875% PSA Prepayment Assumption Rates 100% 180% 250% 400% 2.8% 7.6% 29.4% 69.1% Sensitivity of Class EO to Prepayments Assumed Price 58.636719% PSA Prepayment Assumption Rates 100% 180% 250% 400% 2.8% 7.4% 27.0% 60.2% *  The price does not include accrued interest. Accrued interest has been added to the price in calculating the yields set forth in the table. **  Indicates that investors will suffer a loss of virtually all of their investment. S-23