Sensitivity of Class IW to Prepayments Assumed Price 0.18750%* PSA Prepayment Assumption Rates LIBOR 100% 295% 350% 600% 6.47% and below  .......................... 27.6% 17.4% 14.5% 0.9% 6.50%................................................ 9.1%   (1.8)%   (4.9)%   (19.9)% 6.53% and above............................ ** ** ** ** Sensitivity of Class IX to Prepayments Assumed Price 0.03125%* PSA Prepayment Assumption Rates LIBOR 100% 295% 350% 600% 6.470% and below ........................ 27.6% 17.4% 14.5% 0.9% 6.475%  ............................................ 9.1%   (1.8)%   (4.9)%   (19.9)% 6.480% and above  ........................ ** ** ** ** Sensitivity of Class IY to Prepayments Assumed Price 0.03125%* PSA Prepayment Assumption Rates LIBOR 100% 295% 350% 600% 6.470% and below ........................ 27.6% 17.4% 14.5% 0.9% 6.475%  ............................................ 9.1%   (1.8)%   (4.9)%   (19.9)% 6.480% and above  ........................ ** ** ** ** Sensitivity of Class KI to Prepayments Assumed Price 12.0%* PSA Prepayment Assumption Rates 100% 295% 350% 600% 611% 53.5% 23.4% 23.0% 1.1% 0.0% Sensitivity of Class MI to Prepayments Assumed Price 0.03125%* PSA Prepayment Assumption Rates LIBOR 100% 295% 350% 600% 6.470% and below ........................ 27.6% 17.4% 14.5% 0.9% 6.475%  ............................................ 9.1%   (1.8)%   (4.9)%   (19.9)% 6.480% and above  ........................ ** ** ** ** *    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-37