Effective Fed Funds Rate vs Target Rate
The Effective Federal Funds Rate (EFFR, FRED series) is the volume-weighted median of actual overnight unsecured federal funds transactions, published daily by the New York Fed at 9:00am ET. FEDFUNDS on FRED is the monthly average of that same daily series.
Also known as: Effective Fed Funds Rate (fed funds rate, effective federal funds) · Federal Funds Rate (fed rate, interest rate)
Why This Comparison Matters
The Effective Federal Funds Rate (EFFR, FRED series) is the volume-weighted median of actual overnight unsecured federal funds transactions, published daily by the New York Fed at 9:00am ET. FEDFUNDS on FRED is the monthly average of that same daily series. The two are not a yield-curve pair in the traditional sense but a high-frequency-versus-monthly read on whether the Fed's floor system is operating cleanly: as of late April 2026 EFFR has held at 3.83% within the 3.75 to 4.00% target range set after the December 2024 cut, with the IORB administered rate at 3.90% and the ON RRP rate at 3.80%. Persistent EFFR drift toward the upper bound signals scarce reserves; September 2019 was the breach episode that defined the modern framework.
What EFFR and FEDFUNDS actually measure
The Effective Federal Funds Rate is the volume-weighted median of all overnight unsecured federal funds transactions reported to the New York Fed under the FR 2420 collection. The series captures actual transaction prints from depository institutions and is published every business day at 9:00am ET, one business day after trade date. FEDFUNDS on FRED is the monthly arithmetic average of EFFR for the calendar month, a smoothed series the BEA and economic-research community use for longer-horizon analysis. There is no separate underlying market: both are derived from the same daily transactions, with FEDFUNDS just a moving-window average.
The Fed sets a target range, currently 3.75 to 4.00% as of the December 18, 2024 cut, and uses two administered rates to keep EFFR inside that range. Interest on Reserve Balances (IORB) at 3.90% is the rate banks earn on reserves at the Fed and acts as the soft ceiling, since no bank should lend in fed funds for less than IORB. The Overnight Reverse Repo facility at 3.80% acts as the floor, since money market funds and government-sponsored enterprises that cannot earn IORB can park cash at the Fed at the ON RRP rate. EFFR sits between the two administered rates because of bank balance-sheet costs and FHLB-driven supply that pulls the rate slightly below IORB.
How the floor system actually steers EFFR
Under the post-2008 ample-reserves framework formally adopted in January 2019, the Fed does not conduct daily open-market operations to drain or add reserves to hit the target. Instead, the IORB and ON RRP rates set the corridor, and EFFR is determined by market participants who arbitrage between the federal funds market, the repo market, and Fed facilities. The mechanism has three parts. First, banks compare the federal funds rate to IORB; if EFFR is above IORB, banks borrow in fed funds and earn the spread, pulling EFFR down. Second, money market funds compare ON RRP to bilateral repo and unsecured bank deposits; ON RRP usage spikes when alternative rates fall below it. Third, the Federal Home Loan Banks lend reserves to commercial banks at rates below IORB because FHLBs cannot earn IORB themselves, which is why EFFR typically prints 5 to 10 basis points below IORB.
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Frequently Asked Questions
What is the difference between EFFR and FEDFUNDS?+
EFFR is the daily volume-weighted median of all overnight unsecured federal funds transactions, published by the New York Fed each business day at 9:00am ET. FEDFUNDS on FRED is the monthly arithmetic average of EFFR. There is no separate underlying market: FEDFUNDS is just a calendar-month smoothing of the daily EFFR series, useful for longer-horizon economic research but not for real-time funding-market analysis.
How does the Fed actually control EFFR?+
Under the post-2008 ample-reserves framework, the Fed does not conduct daily open-market operations. It sets two administered rates: IORB (currently 3.90%) is the rate banks earn on reserves and acts as a soft ceiling; ON RRP (currently 3.80%) is the rate available to money funds and GSEs and acts as the floor. EFFR sits between them, currently at 3.83%, because of bank balance-sheet costs and FHLB-driven supply. When EFFR drifts toward the upper bound, the Fed adjusts IORB technically (it did so five times across 2018-2019).
What happened in September 2019?+
On September 16-17, 2019, EFFR briefly traded above the upper bound of the target range and SOFR spiked from 2.43% to 5.25%. The cause was a collision of corporate tax payments, Treasury settlement, and reserve scarcity: the Fed's balance sheet had been shrinking under QT to roughly $1.4 trillion in reserves, the threshold where the system was no longer ample. The NY Fed responded with overnight repo operations and eventually expanded the balance sheet, and the episode led to the formal Standing Repo Facility announced in July 2021.
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Data sourced from FRED, CoinGecko, CBOE, and other providers. This page is for informational purposes only and does not constitute financial advice. Past performance does not guarantee future results.