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Lookback Period

Last updated 2026-08-01

FreddieMac

Updated 2026-08-01

For ARMs, the Lookback Period is the date on which the Index value used to calculate the new Note Rate is determined. The Lookback Period is stated in the Note and is generally expressed as the number of days preceding the Interest Change Date. The related ULDD Data Point names are Interest And Payment Adjustment Index Lead Days Count and Interest Adjustment Index Lead Days Count. Maintenance Fees

FreddieMac Glossary

FreddieMac · pp. 23–25

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