Mortgage-Backed Securities

Current News and Announcements

Fannie Mae Publishes a List of Multifamily Mortgage-Backed Securities Relating to the Morgan Indictment
July 17, 2018

Upcoming Change to Fannie Mae's Single-Family and Multifamily MBS and Structured Transaction Original Issue Fedwire Instructions
July 16, 2018

Separation of Multifamily MBS and Mega Information for Certain Disclosure Files
July 2, 2018

New Single-Family MBS Disclosure Information Center
June 29, 2018

New Multifamily Fixed-Rate Mortgage-Backed Security Prefixes
June 29, 2018

Read All News »


Overview of Products

Single-Family Mortgage-Backed Securities (MBS) »

Fannie Mae creates MBS that represent beneficial ownership interests in a pool of mortgage loans secured by single-family (1-4 units) residential properties. An individual Single-Family MBS pool may hold mortgage loans that are either fixed-rate or adjustable-rate loans but will not hold both fixed-rate and adjustable-rate loans.

Multifamily Mortgage-Backed Securities (MBS) »

Fannie Mae creates MBS that represent beneficial ownership interests in a pool of mortgage loans secured by multifamily (5 or more units) residential properties. An individual Multifamily MBS pool may hold one or more mortgage loans that are either fixed-rate or adjustable-rate loans but will not hold both fixed-rate and adjustable-rate loans.

Structured Transactions and Megas »

Fannie Mae creates multiclass mortgage-backed securities including real estate mortgage investment conduits (REMICs) and stripped mortgage-backed securities (SMBS). REMICs permit an issuer to restructure cash flows on underlying mortgage assets into separately tradable securities. SMBS separate the principal and interest cash flows from underlying mortgage assets to create classes that pay only principal or only interest (known as principal only or interest only classes). Fannie Mae also creates and guarantees a single-class MBS known as a Fannie Mega® security or Mega. Megas are pass-through certificates backed by previously pooled Fannie Mae MBS with similar characteristics and/or other previously pooled Megas with similar characteristics.


Overview of Tools

Fannie Mae provides a wide range of search tools and resources to help users develop a better understanding of the types of mortgage-backed securities that Fannie Mae issues. These tools can be found on the right side of each web page.

ARM MBS Subtypes allows users access to the characteristics of certain key features of adjustable-rate mortgages backing Fannie Mae MBS.

General Word Search allows users to locate REMIC Prospectus Supplements and SMBS Prospectus Supplements/Preliminary Data Statements by keyword.

MBSenger allows user access to MBS articles published by Fannie Mae that discuss Fannie Mae mortgage products and programs.

DUS Disclose® allows users to retrieve pool-level and loan-level information and at-issuance disclosure documents for Multifamily MBS and Megas. Users can locate and download information on Multifamily securities, create a portfolio to track specific Multifamily MBS and Megas, view reports of loan activity, and choose to receive email updates on changes to pools.

DUS Disclose Glossary   allows user access to the definitions of the data elements displayed in the DUS Disclose application.

PoolTalk® allows users to retrieve pool-level information on Single-Family MBS, SMBS, and REMIC securities. PoolTalk is the single repository for Fannie Mae MBS data. Available under the New Issues Statistics tab are the New Issues Pool Statistics (NIPS) and Loan Level Disclosures (LLD) files. Under the Monthly Reporting tab are downloadable files for MBS Stats, Fixed-Rate Quartile File, ARM Stats, Geo Stats, Adjustable-Rate Quartile File, Supplemental File, Interest Only Disclosure File, and DMBS Stats.

PoolTalk Glossary   allows users access to the definitions of the data elements displayed in the PoolTalk application.

Pool Prefix Glossary   allows users access to the pool prefixes for each individual issue of Fannie Mae MBS or Fannie Megas® securities.

Tax Factors allows users to search for tax information on Fannie Mae MBS, REMIC and SMBS securities.

Some of the disclosure and other documents we provide are available in Portable Document Format  . Adobe Reader® software used to view a PDF is available at www.adobe.com.


We have been under conservatorship, with the Federal Housing Finance Agency acting as conservator, since Sept. 6, 2008. We also have entered into a senior preferred stock purchase agreement with the U.S. Department of the Treasury pursuant to which Treasury has committed to provide funding to us under specified circumstances. More information regarding the conservatorship and our agreement with Treasury is provided in our most recent Form 10-K, and may be supplemented by information in any subsequent Form 10-Qs, which are available under "SEC Filings."

Page originally published: 12/21/11
Page last revised: 07/17/18

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