Effective Federal Funds Rate

The federal funds market consists of domestic unsecured borrowings in U.S. dollars by depository institutions from other depository institutions and certain other entities, primarily government-sponsored enterprises.

The effective federal funds rate (EFFR) is calculated as a volume-weighted median of overnight federal funds transactions reported in the FR 2420 Report of Selected Money Market Rates. The New York Fed publishes the EFFR for the prior business day on the New York Fed’s website at approximately 9:00 a.m.

https://www.newyorkfed.org/markets/reference-rates/effr