All values come directly from Federal Reserve via FRED (DFF). We do not modify, smooth, or interpolate published values.
The overnight lending rate between US banks, set by the Federal Reserve via its target range. Directly influences prime rate, adjustable-rate mortgages, credit card APRs, and savings account yields.
Daily — we refresh every hour during US market hours; upstream publishes on business days.
We gate dateModified updates to actual value changes (threshold: 0.01% absolute or 0.5% relative) to prevent freshness spoofing. If the upstream value hasn't moved, we don't claim we updated the page.
Full historical series is available as CSV with primary-source attribution:
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No corrections issued on this series.
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CalcFi. (2026). Federal Funds Rate. Retrieved from https://calcfi.app/data/interest-rates/federal-funds-rate/revisions. Source: Federal Reserve via FRED (DFF).
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