<PAGE>

                                                                    EXHIBIT 99.1

<TABLE>
<CAPTION>
                          CLASS A-7 AVAILABLE FUNDS CAP

--------------------------------------------   -----------------------------------------  -----------------------------------------
            Pay     Available*   Available**             Pay     Available*  Available**            Pay     Available*  Available**
 Period     Date    Funds Cap    Funds Cap     Period    Date    Funds Cap   Funds Cap    Period    Date    Funds Cap    Funds Cap
--------------------------------------------   -----------------------------------------  -----------------------------------------
 <S>      <C>       <C>          <C>           <C>     <C>       <C>         <C>          <C>     <C>       <C>         <C>
    1     10/25/00     N/A          N/A          25    10/25/02    13.05      14.20         49    10/25/04    13.11       18.62
    2     11/25/00    10.32        10.31         26    11/25/02    12.67      13.79         50    11/25/04    12.69       18.02
    3     12/25/00    10.70        10.65         27    12/25/02    13.17      14.34         51    12/25/04    13.11       18.65
    4     01/25/01    10.39        10.31         28    01/25/03    12.79      13.93         52    01/25/05    12.69       18.05
    5     02/25/01    10.46        10.34         29    02/25/03    12.85      14.18         53    02/25/05    12.69       18.20
    6     03/25/01    11.69        11.52         30    03/25/03    14.29      16.28         54    03/25/05    14.05       20.55
    7     04/25/01    10.66        10.46         31    04/25/03    12.97      15.21         55    04/25/05    12.69       18.93
    8     05/25/01    11.06        10.81         32    05/25/03    13.11      15.39         56    05/25/05    13.11       19.56
    9     06/25/01    10.75        10.46         33    06/25/03    12.69      14.92         57    06/25/05    12.69       18.93
   10     07/25/01    11.16        10.81         34    07/25/03    13.11      15.42         58    07/25/05    13.11       19.56
   11     08/25/01    10.88        10.49         35    08/25/03    12.69      15.11         59    08/25/05    12.69       18.93
   12     09/25/01    10.99        10.55         36    09/25/03    12.69      15.56         60    09/25/05    12.69       18.93
   13     10/25/01    10.96        10.46         37    10/25/03    13.11      16.52         61    10/25/05    13.11       19.56
   14     11/25/01    10.67        10.13         38    11/25/03    12.69      15.99         62    11/25/05    12.69       18.93
   15     12/25/01    11.24        10.61         39    12/25/03    13.11      16.55         63    12/25/05    13.11       19.56
   16     01/25/02    11.12        10.43         40    01/25/04    12.69      16.02         64    01/25/06    12.69       18.93
   17     02/25/02    11.22        10.63         41    02/25/04    12.69      16.21         65    02/25/06    12.69       18.93
   18     03/25/02    12.47        12.05         42    03/25/04    13.56      17.81         66    03/25/06    14.05       20.96
   19     04/25/02    11.30        11.13         43    04/25/04    12.69      17.09         67    04/25/06    12.69       18.93
   20     05/25/02    11.71        11.72         44    05/25/04    13.11      17.66         68    05/25/06    13.11       19.56
   21     06/25/02    11.42        11.60         45    06/25/04    12.69      17.12         69    06/25/06    12.69       18.93
   22     07/25/02    11.84        12.02         46    07/25/04    13.11      17.69         70    07/25/06    13.11       19.56
   23     08/25/02    11.71        12.02         47    08/25/04    12.69      17.28         71    08/25/06    12.69       18.93
   24     09/25/02    12.20        12.89         48    09/25/04    12.69      17.65
--------------------------------------------   -----------------------------------------  -----------------------------------------
</TABLE>

*   Assumes 1 month LIBOR is 6.62% and 6 month LIBOR is 6.78%.
** Assumes the 1month LIBOR and 6 month LIBOR instantaneously increase to a
level beyond the highest maximum obtainable rate on the adjustable rate mortgage
loans and run at the pricing speed to call.