Why does a Fed rate decision matter?

The Federal Reserve sets a target for the federal funds rate — the overnight rate at which banks lend to each other. On its own it is a rate almost nobody outside banking pays directly. It matters because nearly every other financial price is built on top of it.

The chain of effects

• Borrowing costs. Bank funding costs feed into mortgage rates, corporate loans, credit cards and auto loans. Higher policy rates gradually make borrowing more expensive across the economy; cuts work in reverse, with a lag.
• Bond yields. Government bond yields embed the expected path of the policy rate. A decision — or even a changed hint about future decisions — moves that expected path, repricing trillions of dollars of debt within minutes.
• Equity valuations. A share's value is, in one common framing, its future cash flows discounted back to today. The discount starts from risk-free yields, so when yields rise, the same future profits are worth less today — an effect that historically weighs hardest on companies whose profits sit furthest in the future.
• The dollar. Relative interest rates influence where global capital sits. Shifts in Fed policy expectations move the dollar against other currencies, which feeds back into commodity prices, emerging markets and multinational earnings.
• Risk appetite broadly. Cheap money historically coincides with more willingness to hold speculative assets; tighter money with less. Crypto has often — though not always — traded as one of the most rate-sensitive corners of that spectrum.

Expectations do most of the work

By decision day, markets have usually priced a probability distribution over the outcomes. The reaction therefore tracks the surprise, not the decision itself: an expected hold can move markets more than an expected cut if the accompanying language shifts the path ahead. This is also why speeches and minutes between meetings are market events — they move the expected path without any decision at all.

How we cover it

Fed events reach our calendar from the Federal Reserve's own schedule; statements and speeches arrive through official feeds; and the morning brief assembles decision-day chronology after the close. When a move coincides with a decision, we label the causal confidence explicitly — "likely driver" or "coincident development" — because sessions have many inputs and honest coverage says so.