Sensitivity of Class UA to Prepayments Assumed Price 9.5%* PSA Prepayment Assumption Rates LIBOR 100% 225% 350% 500% 0.1% .......................................... 61.8% 56.9% 53.8% 46.7% 1.1% .......................................... 48.8% 43.8% 40.3% 32.7% 4.1% .......................................... 10.7% 5.9% 0.7%   (8.2)% 6.0% and above ...................... ** ** ** ** Sensitivity of Class UB to Prepayments Assumed Price 4.07812%* PSA Prepayment Assumption Rates LIBOR 100% 225% 350% 500% 6.0% and below ...................... 21.8% 16.7% 12.1% 3.5% 6.6%  .......................................... 3.6%   (0.7)%   (6.2)%   (15.4)% 7.2% and above ...................... ** ** ** ** SECURITY GROUP 2 Sensitivity of Class ED to Prepayments Assumed Price 46.5525% PSA Prepayment Assumption Rates 100% 175% 300% 400% 3.2% 5.4% 31.6% 46.2% Sensitivity of Class EL to Prepayments Assumed Price 53.5% PSA Prepayment Assumption Rates 100% 175% 300% 400% 3.3% 3.3% 3.8% 4.9% Sensitivity of Class IA to Prepayments Assumed Price 12.0%* PSA Prepayment Assumption Rates 100% 175% 300% 400% 421% 1.9% 1.9% 1.9% 0.9% 0.0% *  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-38