The short version
- The policy rate directly affects only overnight lending between banks. Raising it is a decision to make credit more expensive, not a weather report.
- Short-term consumer rates reprice in days; long-term rates do not. They move on the expected path of policy, not the day's vote.
- Mortgage rates track the ten-year Treasury. A cut the market already expected can leave them unchanged, or push them up.
- The full effect on output and prices takes months to years. That lag is why a tightening that looks 'late' is often the bill for money that was already too easy.
The overnight policy rate, and the ten-year yield that longer borrowing tracks.
The first step is very small — and it is still a choice
The federal funds rate applies to one thing: unsecured overnight loans of reserve balances between banks. The total economic significance of that market, on its own, is minor. Its significance comes from being the anchor for everything priced off short-term money.
Holding that rate below the level that would restrain credit is an invitation to more borrowing. More borrowing, in a banking system that creates deposits, is more money. Raising the rate withdraws the invitation. Neither move is forced by the data print that week. Both are decisions about how much credit the Committee is willing to underwrite.
- The FOMC votes Sets a target range for overnight lending between banks.
- Short rates reprice Prime, credit cards, business credit lines — days to a statement cycle.
- Long yields Set by what markets expect the short rate to average for years, not by the vote.breaks here
- Mortgages and business loans Track the ten-year, so they can sit still through a cut.
- Spending, hiring, prices Months to more than a year later.
What moves quickly
Rates that are contractually indexed to short-term benchmarks reprice almost immediately. The prime rate, which many business credit lines and variable consumer products key off, typically moves within days of a decision. Credit card APRs follow on the next statement cycle.
Savings rates move too, but with a well-documented asymmetry: they tend to rise more slowly after increases than they fall after cuts. Depositors are the last to be paid when money was cheap, and among the last to be compensated when it is not.
What moves slowly, and why
Long-term rates are not set by the policy rate. A ten-year Treasury yield reflects what markets expect the short rate to average over ten years, plus compensation for holding a long bond — including compensation for expected inflation.
The practical consequence surprises people: a cut that was fully expected can leave long yields unchanged, or push them up if the accompanying commentary suggests fewer cuts ahead than markets had priced. Mortgage rates, which track the ten-year, then fail to fall despite a “rate cut” in the headlines. Nothing has gone wrong — the cut was in the price already. See why mortgage rates move.
A move is counted in basis points: one hundredth of a percentage point. A “25 basis point hike” is a quarter of one percent on the overnight target, not on your mortgage.
Who pays
When rates rise, new borrowers pay first — households taking a mortgage, firms rolling commercial paper, anyone on a variable contract. Existing holders of long bonds can lose on price. Housing activity and interest-sensitive investment slow.
When rates were held down, a different group paid: savers, pensioners, and anyone whose wage or benefit lagged the price level. A tightening is often described as the Fed “inflicting pain.” The pain is the real adjustment after money was already too easy for too long. Leaving rates low would not cancel that bill; it would send it through the currency instead.
The lag
The effect on real activity and inflation arrives last, through investment decisions, hiring, and the housing market. Economists conventionally describe this as operating with “long and variable lags”, a phrase from Milton Friedman that has survived because no one has improved on its honesty: the delay is measured in quarters, and it is not the same length every time.
This is why the Committee is reacting to forecasts rather than to the latest data print. By the time an effect is visible, the decision that caused it is a year old. It is also why a Committee that waits for the inflation print to roll over before it tightens is choosing to validate a higher path for prices in the meantime.
How to read the coverage
- “The Fed raised rates” — it raised the overnight target. Ask what the ten-year did the same day.
- “Mortgage rates rose after a cut” — look at guidance and the ten-year, not the target range. See the mortgage explainer.
- “The hike will show up in inflation next month” — it will not. The lag is quarters.
- “The Fed had no choice” — the constraint is the price-level path it already allowed. The vote is still a vote.
Sources
- 1.Federal Reserve Board, Monetary Policy: What Are Its Goals?. Retrieved Sep 1, 2026.
- 2.U.S. Department of the Treasury, Daily Treasury Par Yield Curve Rates. Retrieved Sep 1, 2026.
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