Fannie Mae provides the following data files, which provide Yield Maintenance information for multifamily loans backing DUS MBS.
The Yield Maintenance Period End Dates report (.TXT) contains the associated pool number, loan number, and yield maintenance period end dates applicable to certain multifamily loans backing DUS MBS issued before June 2003. To view the yield maintenance end dates for MBS issued in June 2003 and after, please review the Schedule of Loan Information portion of the Multifamily MBS Prospectus Supplement for that specific MBS. The Schedule of Loan Information can be located by entering the MBS pool number or CUSIP number into DUS Disclose™.
Monthly Yield Maintenance Factor files (.TXT), available below, provide monthly factor information related to yield maintenance prepayment premiums paid on multifamily MBS. The monthly factors published in this file may be used to calculate the amount of yield maintenance prepayment premium that will be passed through to investors in the current month. To calculate the portion of yield maintenance payable to an investor on a specific MBS, the investor should multiply the applicable monthly yield maintenance factor by the issuance unpaid principal balance (UPB) of the MBS held by the investor. This file is published on or about the fifth business day each month and discloses the record date, payment date, CUSIP number, pool prefix, pool number, and yield maintenance factor for each MBS on which a yield maintenance prepayment premium is being passed through in the current month. A file layout is provided for reference: Multifamily Yield Maintenance Factor file layout (PDF).
Yield Maintenance Factor Updated files (.TXT), also available below, will be published as needed to record updates or additions to previously published Yield Maintenance Factor files.
For more information regarding yield maintenance, please refer to Fannie Mae’s Multifamily MBS Prospectus or the relevant MBS Prospectus Supplement. You may also refer to the Prepayment Protection section of Fannie Mae’s MBSenger publication or contact the Fixed-Income Securities Investor Helpline at 800-2FANNIE (800-232-6643) or via email with questions.
Yield Maintenance Updated Files
2014 and 2013
Yield Maintenance Factor Files
Last Revised: 09/08/20