The Weighted Average Lives are likely to vary, perhaps significantly, from those set  forth  in  the  tables  below  due  to  the  differences  between  the  actual  rate  of prepayments on the Mortgage Loans underlying the Ginnie Mae Multifamily Certifi- cates and the Modeling Assumptions. The information shown for the Notional Class is for illustrative purposes only, as a Notional Class  is  not  entitled  to  distributions  of  principal  and  has  no  weighted  average  life.  The weighted average life shown for the Notional Class has been calculated on the assumption that a reduction in the Class Notional Balance thereof is a distribution of principal. S-21