Sensitivity of Class SH to Prepayments Assumed Price 104.34016%* PSA Prepayment Assumption Rates LIBOR 100% 270% 300% 550% 4.2375% .................................... 8.7% 8.3% 8.3% 7.8% 5.2375% .................................... 4.8% 4.4% 4.4% 3.9% 6.2375% .................................... 0.9% 0.6% 0.5% 0.1% 6.5500% and above ................    (0.3)% (0.6)% (0.7)% (1.1)% Sensitivity of Class SJ to Prepayments Assumed Price 105.98179%* PSA Prepayment Assumption Rates LIBOR 100% 270% 300% 550% 4.2375% .................................... 9.0% 8.5% 8.4% 7.8% 5.2375% .................................... 4.9% 4.4% 4.3% 3.7% 6.2375% .................................... 0.8% 0.4% 0.3% (0.3)% 6.5500% and above ................    (0.5)% (0.9)% (1.0)% (1.6)% Sensitivity of Class SK to Prepayments Assumed Price 104.38462%* PSA Prepayment Assumption Rates LIBOR 100% 270% 300% 550% 4.2375% .................................... 7.3% 7.3% 7.3% 6.9% 5.2375% .................................... 3.9% 3.9% 3.9% 3.5% 6.2375% .................................... 0.5% 0.5% 0.5% 0.2% 6.5500% and above ................    (0.6)% (0.6)% (0.6)% (0.9)% Sensitivity of Class SM to Prepayments Assumed Price 95.00149%* PSA Prepayment Assumption Rates LIBOR 100% 270% 300% 550% 4.2375% ....................................    8.8% 9.8% 10.2% 11.6% 5.2375% ....................................    5.1% 6.1% 6.5% 8.1% 6.2375% ....................................    1.4% 2.4% 2.9% 4.5% 6.5500% and above ................    0.3% 1.3% 1.8% 3.4% Sensitivity of Class SN to Prepayments Assumed Price 112.54833%* PSA Prepayment Assumption Rates LIBOR 100% 270% 300% 550% 4.2375% .................................... 10.2% 9.2% 9.1% 7.7% 5.2375% .................................... 5.3% 4.4% 4.3% 3.0% 6.2375% .................................... 0.5% (0.3)% (0.5)% (1.7)% 6.5500% and above ................    (1.0)% (1.8)% (1.9)% (3.2)% * The price does not include accrued interest. Accrued interest has been added to the price in calculating the yields set forth in the table. S-41