- A central bank sets one main rate, and many other rates in the economy follow it
- Raising the rate usually cools demand, lowering it usually supports activity
- The effects spread slowly, often over a year or more
Who makes the decision
In most countries a central bank is responsible for keeping prices stable. Its main tool is a short-term interest rate, often called the policy rate or key rate. Decisions are usually made by a committee that meets on a published schedule and explains its reasoning in a statement afterwards.
How one rate affects many others
The policy rate affects the cost at which banks can borrow from each other and from the central bank. Banks pass changes on to households and businesses through the rates they charge and offer. That is why one decision can change borrowing costs across the whole economy.
Why rates go up or down
When inflation is high, a central bank may raise its rate. Borrowing becomes more expensive, people and companies tend to spend a little less, and pressure on prices can ease. When the economy is weak and inflation is low, it may lower the rate to make borrowing cheaper and support spending and hiring.
The decision is always a balance. Raising rates too far can slow the economy more than intended. Keeping them too low for too long can let inflation build up.
Why the effects take time
Many agreements and contracts are fixed for months or years, and businesses plan their spending well in advance. As a result, a change in the policy rate reaches the wider economy gradually. Central banks often say that the full effect takes a year or more, which is why they look at forecasts and not only at the latest numbers.
What to look for in the news
Besides the decision itself, pay attention to the statement and the press conference. They explain how the committee sees the economy and what could change its view. Reports often focus on the words used as much as on the number.
This article is general information for learning purposes. It is not professional advice.