Who Actually Controls Interest Rates?

On August 19, 2026, President Donald Trump argued that U.S. interest rates were artificially high and said that every percentage point of interest costs about $600 billion. He also argued that a strong country should have lower interest rates.

Those statements combine several different ideas: the Federal Reserve's policy rate, federal interest expense, market-determined Treasury yields and the effect of lower rates on economic growth. They are related, but they are not the same thing.

The Federal Open Market Committee sets a target range for the federal funds rate, the overnight rate for borrowing between banks. Changes in that rate influence other short-term rates and broader financial conditions, but the Fed does not directly set every Treasury yield, mortgage rate, business loan or credit-card rate.

In July 2026, the Fed reported that it had maintained a 3.50% to 3.75% target range while inflation remained elevated relative to its 2% objective.

The underlying idea is real: with a very large federal debt load, higher average borrowing costs can eventually add hundreds of billions of dollars to annual interest expense.

But there is no automatic rule that a one-percentage-point Fed cut immediately saves $600 billion. The entire federal debt does not refinance at once, Treasury securities have different maturities, and newly issued long-term debt is priced in the bond market. An estimate such as '$600 billion per point' depends on which debt is counted, refinancing timing, maturity mix and the period being measured.

Lower rates can stimulate the economy in the short run by encouraging business investment, housing and purchases of durable goods. That can raise output and employment.

But stronger demand can also put upward pressure on inflation. If inflation is already elevated, keeping rates too low can make price stability harder to achieve. This tradeoff is one reason the Fed's mandate includes maximum employment and stable prices.

Monetary policy can affect GDP and employment in the short run, but mainstream economic analysis does not treat lower interest rates as a way to permanently multiply real economic growth. Over longer periods, real GDP is constrained by productive capacity: workers, capital, technology and productivity.

Lower rates can change when households and businesses spend and invest. They cannot by themselves make the economy permanently produce many times more goods and services. If demand rises much faster than productive capacity, part of the result can instead appear as higher prices.

Whether rates are too high is a legitimate economic-policy debate. A stronger claim—that policymakers have no economic reason for maintaining them—can be compared with inflation, employment, growth data and the Fed's published explanations.

An allegation that rates were deliberately kept high for political reasons is different. That is a claim about intent and would require evidence of political motivation, not simply disagreement with the policy decision.