Sensitivity of Class XI to Prepayments Assumed Price 1.625%* PSA Prepayment Assumption Rates 125% 251% 386% 400% 550% 20.4% 11.0% 0.0%   (1.1)%   (14.7)% Sensitivity of Class XS to Prepayments Assumed Price 10.125%* PSA Prepayment Assumption Rates LIBOR 125% 251% 400% 550% 0.10% ........................................ 68.1% 57.2% 43.5% 28.7% 1.10% ........................................ 56.1% 45.6% 32.4% 18.1% 4.10% ........................................ 21.7% 12.3% 0.2%   (13.4)% 7.25% and above .................... ** ** ** ** SECURITY GROUP 7 Sensitivity of Class ID to Prepayments Assumed Price 10.1875%* PSA Prepayment Assumption Rates 75% 150% 250% 400% 547% 13.8% 9.2% 9.2% 7.2% 0.0% SECURITY GROUPS 7, 8, 9, 10, 11 AND 13 Sensitivity of Class IX to Prepayments Assumed Price 12.21146%* PSA Prepayment Assumption Rates 75% 150% 250% 396% 400% 30.2% 18.1% 10.7% 0.1%   (0.2)% SECURITY GROUP 8 Sensitivity of Class IE to Prepayments Assumed Price 11.71875%* PSA Prepayment Assumption Rates 75% 150% 250% 294% 400% 40.9% 27.0% 9.6% 0.0%   (23.4)% *  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