Sensitivity of Class SY to Prepayments Assumed Price 6.56653%* PSA Prepayment Assumption Rates LIBOR 100% 270% 300% 550% 4.2375% .................................... 31.0% 22.3% 20.8% 7.6% 5.2375% .................................... 13.7% 4.4% 2.7% (11.7)% 6.2375% ....................................    (6.0)% (15.7)% (17.5)% (33.1)% 6.5500% and above ................ ** ** ** ** Sensitivity of Class YS to Prepayments Assumed Price 6.59598%* PSA Prepayment Assumption Rates LIBOR 100% 270% 300% 550% 4.2375% .................................... 31.0% 22.3% 20.8% 7.6% 5.2375% .................................... 13.7% 4.5% 2.8% (11.6)% 6.2375% ....................................    (5.7)% (15.5)% (17.3)% (32.9)% 6.5600% and above ................ ** ** ** ** SECURITY GROUP 2 Sensitivity of Class AI to Prepayments Assumed Price 51.73049%* PSA Prepayment Assumption Rates 125% 250% 375% 477% 500% 6.7% 6.7% 4.1% 0.0% (1.0)% Sensitivity of Class AJ to Prepayments Assumed Price 56.46261%* PSA Prepayment Assumption Rates 125% 250% 375% 495% 500% 6.5% 6.5% 4.3% 0.0% (0.2)% Sensitivity of Class BI to Prepayments Assumed Price 61.21791%* PSA Prepayment Assumption Rates 125% 250% 375% 500% 509% 6.3% 6.3% 4.4% 0.4% 0.0% Sensitivity of Class BJ to Prepayments Assumed Price 55.83032%* PSA Prepayment Assumption Rates 125% 250% 375% 493% 500% 6.5% 6.5% 4.3% 0.0% (0.3)% * 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-43