What Is the Federal Funds Rate?

The federal funds rate is the interest rate at which US commercial banks lend their excess reserve balances to other banks on an overnight basis. It is set by the Federal Open Market Committee (FOMC) and serves as the primary tool of US monetary policy. No single interest rate has a greater influence on borrowing costs, asset prices, and economic activity across the global financial system.

How the Federal Funds Rate Is Set

The FOMC does not set the federal funds rate by decree. Instead, it sets a target range — typically a 25-basis-point band, such as 5.25% to 5.50% — and uses open market operations to keep the actual rate trading within that range. The Federal Reserve achieves this primarily through the interest rate it pays on reserve balances held at the Fed, known as IORB (Interest on Reserve Balances), which effectively acts as a floor for the federal funds rate.

The FOMC meets eight times per year on the Federal Reserve meeting schedule to review economic conditions and vote on whether to raise, lower, or hold the target range. The decision is announced at 2:00 PM Eastern Time on the final day of each meeting, followed by a press conference at 2:30 PM ET where the Fed Chair explains the committee's reasoning.

Why the Federal Funds Rate Matters to Investors

The federal funds rate is the foundation upon which virtually all other interest rates in the US economy are built. When the Fed raises the rate, borrowing becomes more expensive across the economy — mortgages, auto loans, corporate credit, and credit card rates all tend to rise in response. When the Fed cuts, borrowing costs fall, stimulating spending and investment.

For equity investors, the federal funds rate affects stock valuations through the discount rate used in present value calculations. Higher rates reduce the present value of future earnings, which puts downward pressure on price-to-earnings multiples — particularly for high-growth companies whose earnings are weighted toward the distant future. Lower rates have the opposite effect, expanding multiples and supporting equity valuations.

For bond investors, the federal funds rate directly influences short-term Treasury yields, particularly the 2-year note, which is the most sensitive to near-term rate expectations. Longer-duration bonds respond more to the Fed's inflation outlook and the anticipated path of rates over multiple years than to the current target range alone.

The Difference Between the Federal Funds Rate and Other Interest Rates

The federal funds rate is an overnight interbank lending rate — it governs transactions between banks, not between banks and consumers. Consumer-facing rates such as the prime rate, mortgage rates, and savings account yields are influenced by the federal funds rate but are set independently by financial institutions.

The prime rate, for example, is typically set at 300 basis points above the federal funds rate target and moves in lockstep with Fed decisions. The 30-year mortgage rate is influenced by the 10-year Treasury yield, which responds to longer-term inflation expectations rather than the current federal funds rate directly.

How the Fed Uses the Rate to Fight Inflation and Support Growth

The Fed operates under a dual mandate from Congress: maximum employment and stable prices (defined as approximately 2% annual inflation). The federal funds rate is its primary instrument for pursuing both goals, though the two objectives can pull in opposite directions.

When inflation is elevated, the Fed raises rates to cool demand — making borrowing more expensive reduces consumer spending and business investment, which slows price growth. When unemployment is high or economic growth is weak, the Fed cuts rates to stimulate activity. The challenge of monetary policy lies in calibrating the rate precisely enough to achieve both objectives simultaneously, a balance that is rarely straightforward in practice.

What Is the Neutral Rate?

The neutral rate — sometimes called r-star (r*) — is the theoretical federal funds rate at which monetary policy is neither stimulative nor restrictive. It is the rate consistent with the economy operating at full employment with stable inflation. The Fed's estimate of the neutral rate is published in the dot plot's longer-run projections and is one of the most debated concepts in monetary economics.

When the federal funds rate is above the neutral rate, monetary policy is considered restrictive — it is actively slowing the economy. When it is below the neutral rate, policy is accommodative — it is actively stimulating growth. The distance between the current rate and the neutral rate is one of the key variables investors use to assess how much further the Fed may need to move in either direction.

Key Takeaway

The federal funds rate is the most important interest rate in the US economy. Set by the FOMC at eight meetings per year, it influences borrowing costs, asset valuations, currency exchange rates, and economic growth across the globe. For investors, understanding the current rate, the direction of travel, and the Fed's forward guidance is not optional background knowledge — it is a prerequisite for interpreting nearly every major market move.

This article is part of Big Market Report's ongoing coverage of Federal Reserve policy and FOMC meetings.

This article is for informational purposes only and does not constitute investment advice. For official Federal Reserve data and policy statements, visit federalreserve.gov.