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%). The Federal Reserve uses open market operations—primarily buying and selling government securities—to keep the effective federal funds rate within this target range.

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.

Historical Context

The Fed Funds Rate has ranged from 0–0.25% (during the 2008 financial crisis and COVID-19 pandemic quantitative easing periods) to as high as 20% in 1981 when then-Chair Paul Volcker aggressively fought inflation.