MBS News and Announcements

Fannie Mae Updates Pooling Parameters for Fixed-Rate MBS as well as Fannie Majors®

Fannie Mae will be implementing changes to the pooling requirements for most fixed-rate mortgage-backed securities (MBS) and Fannie Majors1. The following table identifies these changes, the affected securities, and the effective date of the changes.

Pooling Requirement Change Fannie Majors

Complete details on the changes made to the pooling requirements may be found in the Selling Guide announcement.

For any questions, please contact the Fannie Mae Investor Help Line at 1-800-232-6643, Option 2 or by e-mail.


1Fannie Majors are typically multiple-issue Fannie Mae Mortgage-Backed Securities (MBS) comprised of current production mortgage loans, 30-, 20-, 15-, or 10-year fixed-rate; High Balance loans; and/or loans with a loan-to-value ratio greater than 105%.