2. converting the monthly rates to corporate bond equivalent rates. These calculations do not take into account variations that may occur in the interest rates at which  investors  may  be  able  to  reinvest  funds  received  by  them  as  distributions  on  their Securities and consequently do not purport to reflect the return on any investment in any Class when those reinvestment rates are considered. The information set forth in the following tables was prepared on the basis of the Modeling Assumptions and the assumptions that (1) the Interest Rate applicable to each Floating Rate or Inverse Floating Rate Class for each Accrual Period following the first Accrual Period will be based on the indicated level of LIBOR and (2) the purchase price of each Class (expressed as a percentage  of  its  original  Class  Principal  Balance  or  Class  Notional  Balance)  plus  accrued interest (in the case of the interest-bearing Classes)  is as indicated in the related  table. The assumed purchase price is not necessarily that at which actual sales will occur. SECURITY GROUP 1 Sensitivity of Class GO to Prepayments Assumed Price 76.46875% PSA Prepayment Assumption Rates 125% 250% 300% 500% 2.5% 2.5% 2.5% 3.9% Sensitivity of Class IA to Prepayments Assumed Price 3.53125%* PSA Prepayment Assumption Rates 125% 250% 300% 500% 3456% 161.7% 161.7% 161.7% 161.7% 0.0% Sensitivity of Class IB to Prepayments Assumed Price 7.625%* PSA Prepayment Assumption Rates 125% 250% 300% 500% 1634% 68.7% 68.7% 68.7% 62.8% 0.0% Sensitivity of Class IC to Prepayments Assumed Price 8.8125%* PSA Prepayment Assumption Rates 125% 250% 300% 500% 1379% 53.2% 53.2% 53.2% 46.5% 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. S-34