Prime Rate

The prime rate is not set by the Federal Reserve — it is determined by individual commercial banks, though in practice the major banks all move in lockstep because they are all responding to the same underlying signal: the federal funds rate target set by the FOMC. When the Fed raises its benchmark rate, banks raise their prime rates within days; when the Fed cuts, prime rates fall almost as quickly. The Wall Street Journal publishes a consensus prime rate based on a survey of the ten largest U.S. banks, and this 'WSJ Prime Rate' has become the de facto national benchmark.

The prime rate matters enormously for tens of millions of American borrowers. Variable-rate credit cards, home equity lines of credit (HELOCs), small business loans, and many adjustable-rate mortgages are priced as 'prime plus X percent.' When the Federal Reserve raised the federal funds rate from near zero to above 5% between March 2022 and mid-2023, the prime rate climbed in tandem from 3.25% to 8.50% — the highest level since 2001. For a homeowner with a $200,000 HELOC, that shift translated into an extra $4,000 or more in annual interest charges.

Historically, the prime rate reached its all-time high during the early 1980s under Fed Chairman Paul Volcker, who deliberately pushed rates to painful heights — the prime touched 21.5% in December 1980 — to break the back of double-digit inflation that had plagued the U.S. throughout the 1970s. The strategy worked, but at the cost of a severe recession and unemployment above 10%.

For equity investors, monitoring the prime rate offers a quick gauge of borrowing costs throughout the economy. Rising prime rates compress consumer spending, squeeze small-business margins, and cool the housing market — all factors that feed into corporate earnings. Conversely, a falling prime rate typically stimulates the economy by reducing the cost of credit across a wide swath of households and businesses.