Single-Family MBS Disclosure Enhancement – Mission Index Version

In conjunction with Freddie Mac, Fannie Mae is enhancing its Single-Family mortgage-backed securities (MBS) disclosures to include the Single-Family Mission Index Version. This new attribute is defined as the version of the Mission Index™ methodology used to calculate the Mission Criteria Share and the Mission Density Score. This enhancement will be effective on September 23, 2024, and will be disclosed at a pool level beginning with October 2024 issuances. The new pool-level attribute will also be provided for all outstanding MBS with the publication of the monthly disclosure files in October 2024.

For background, the reformulated Mission Index (V1.1) was implemented for Fannie Mae MBS pools beginning with March 2024 issuances. Mission Index scores for pools issued in January 2010 through February 2024 utilized the V1.0 methodology. Please refer to the methodology overview for details on the Mission Index.

The sample files are available here.

For questions, please contact the Fannie Mae Investor Help Line at 1-800-232-6643, Option 3 or by e-mail.