The Underlying Certificates (Groups 3, 4, 7, 8, 9, 10, 11, 12 and 13) The Group 3, 4, 7, 8, 9, 10, 11, 12 and 13 Trust Assets  are Underlying Certificates that represent beneficial ownership interests in one or more separate trusts, the assets of which evidence direct or indirect beneficial ownership interests in certain Ginnie Mae Certificates. Each  Underlying  Certificate  constitutes  all  or  a  portion  of  a  class  of  a  separate  Series  of certificates described in the related Underlying Certificate Disclosure Document, excerpts of which are attached as Exhibit B to this Supplement. Each Underlying Certificate Disclosure Document  may  be  obtained  from  the  Information  Agent  as  described  under  "Available Information" in this Supplement. Investors are cautioned that material changes in facts and circumstances  may  have  occurred  since  the  date  of  each  Underlying  Certificate  Disclosure Document, including changes in prepayment rates, prevailing interest rates and other eco- nomic factors, which may limit the usefulness of, and be directly contrary to the assumptions used  in  preparing  the  information  included  in,  the  offering  document.  See  "Underlying Certificates" in the Base Offering Circular. Each Underlying Certificate provides for monthly distributions and is further described in the table contained in Exhibit A to this Supplement. The table also sets forth information regarding approximate weighted average remaining terms to maturity, loan ages and mortgage rates of the Mortgage Loans underlying the related Ginnie Mae Certificates. The Mortgage Loans The Mortgage Loans underlying the Group 1, 2, 5 and 6 Trust Assets are expected to have, on a weighted average basis, the characteristics set forth in the Terms Sheet under "Assumed Characteristics of the Mortgage Loans Underlying the Group 1, 2, 5 and 6 Trust Assets" and the general characteristics described in the Base Offering Circular. The Mortgage Loans underlying the Underlying Certificates are expected to have, on a weighted average basis, the characteris- tics set forth in Exhibit A to this Supplement. The Mortgage Loans will consist of first lien, single-family,  fixed  rate,  residential  mortgage  loans  that  are  insured  or  guaranteed  by  the Federal Housing Administration, the United States Department of Veterans Affairs, the Rural Housing  Service  or  the  United  States  Department  of  Housing  and  Urban  Development ("HUD"). See "The Ginnie Mae Certificates – General" in the Base Offering Circular. Specific information regarding the characteristics of the Mortgage Loans is not available. For purposes of this Supplement, certain assumptions have been made regarding the remaining terms to maturity, loan ages and, in the case of the Group 2 Trust Assets, Mortgage Rates of the Mortgage Loans. However, the actual remaining terms to maturity, loan ages and, in the case of the Group 2 Trust Assets,  Mortgage Rates of many of the Mortgage Loans will differ from the characteristics  assumed,  perhaps  significantly.  This  will  be  the  case  even  if  the  weighted average characteristics of the Mortgage Loans are the same as the assumed characteristics. Small differences in the characteristics of the Mortgage Loans can have a significant effect on the weighted average lives and yields of the Securities. See "Risk Factors" and "Yield, Maturity and Prepayment Considerations" in this Supplement. The Trustee Fee On each Distribution Date, the Trustee will retain a fixed percentage of all principal and interest distributions received on specified Trust Assets in payment of its fee. S-14