Last reviewed 10-31-2026Short-Sale.com Editorialglossary
Look-Back Period
Fannie Mae
Updated 10-31-2026
Look-Back Period
The date on which the index value that will be used to establish the next interest rate change for an ARM is determined. It is a specified number of days (at least 45) before the interest rate change date.
Fannie Mae Glossary of Terms
Fannie Mae · p. 27
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