The Federal Funds Rate is the interest rate at which depository institutions (banks and credit unions) lend reserve balances to other depository institutions overnight on an uncollateralized basis. It is set by the Federal Open Market Committee (FOMC), the monetary policy-making body of the Federal Reserve System.

Why It Matters

The Fed Funds Rate is arguably the most influential interest rate in the world. It serves as the benchmark for virtually all other short-term interest rates in the U.S. economy, including rates on mortgages, credit cards, auto loans, savings accounts, and corporate borrowing. When the Fed raises this rate, borrowing becomes more expensive throughout the economy; when it cuts, borrowing becomes cheaper.

How It Works

The FOMC meets eight times per year and sets a target *range* for the federal funds rate (e.g., 5.25%–5.50%). Since the 2008 crisis the U.S. banking system has operated with ample reserves, so the Fed now steers the rate mainly through *administered rates*—the Interest on Reserve Balances (IORB) it pays banks and the Overnight Reverse Repo (ON RRP) facility—which together form a floor keeping the effective rate inside the target range, rather than the scarce-reserve open market operations of earlier decades. Alongside each rate decision the FOMC publishes its Summary of Economic Projections, including the closely watched "dot plot" that maps each official's expectation for the future rate path.

The Dual Mandate

The Federal Reserve has a dual mandate from Congress: to promote maximum employment and stable prices (low inflation). Raising rates helps control inflation by slowing economic activity, while lowering rates stimulates growth and employment.

Market Impact

Rate decisions and forward guidance from the FOMC are among the most market-moving events globally. Higher rates typically strengthen the U.S. dollar, raise Treasury yields, and can pressure equity valuations (especially growth stocks). Lower rates tend to weaken the dollar, boost stocks, and push investors toward riskier assets for yield. Markets often move more on the *guidance* and dot plot than on the decision itself, since the rate change is usually anticipated.

Historical Context

The Fed Funds Rate has ranged from 0–0.25% (during the 2008 financial crisis and the COVID-19 pandemic) to as high as 20% in 1981, when then-Chair Paul Volcker crushed double-digit inflation. Most recently, the Fed lifted off from near zero in March 2022 and raised rates to 5.25%–5.50% by July 2023—the fastest tightening cycle in four decades—to fight post-pandemic inflation, held there for over a year, then began easing with a 50-basis-point cut in September 2024.