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Fannie Mae and Freddie Mac Announce Replacement Indices for Legacy LIBOR ARM Loans

Michael Christians • January 26, 2023

On January 25th, both the Federal National Mortgage Association (FNMA) and the Federal Home Loan Mortgage Corporation (Freddie Mac) announced the replacement indices for their existing LIBOR-based adjustable-rate mortgage (ARM) loans.


By way of reminder, the 1-month, 3-month, 6-month, and 1-year London Interbank Offered Rate (LIBOR) indices will cease publication on June 30, 2023. In response, the Federal Reserve's Alternative Reference Rates Committee identified the Secured Overnight Financing Rate (SOFR) index as a recommended replacement.


While both Fannie Mae and Freddie Mac have been using the SOFR index on new ARM plans for some time, up until now, they had not identified what index would replace LIBOR in connection with their existing ARM loans. However, based on the January 25th announcement from both agencies, we now have that information.


Fannie Mae

  • The current 1-month LIBOR index will be replaced by the 1-month CME SOFR
  • The current 6-month LIBOR index will be replaced by the 6-month CME SOFR
  • The current 1-year LIBOR index will be replaced by the 1-year CME SOFR


Freddie Mac

  • The current 1-month LIBOR index will be replaced by the 1-month CME SOFR
  • The current 6-month LIBOR index will be replaced by the 6-month CME SOFR
  • The current 1-year LIBOR index will be replaced by the 1-year CME SOFR


CME stands for the spread-adjusted term SOFR index as administered by the CME Group Benchmark Administration, LTD.


You can access Fannie Mae's announcement here and Freddie Mac's announcement here.

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