How central banks fight inflation
When prices rise too fast, central banks raise interest rates to cool spending. The effect is real but slow, which is why policy can feel like steering a large ship.
Photo: Retired electrician / Wikimedia Commons, CC0
Inflation is the general rise in prices across an economy. It is usually measured with a consumer price index, which tracks the cost of a typical basket of goods and services, from rice and fuel to rent and school fees.
The main tool: interest rates
Most central banks set a short-term policy interest rate. Commercial banks follow it when they price loans and deposits. When inflation runs too high, the central bank raises that rate.
Higher rates make borrowing more expensive for households and companies, so they spend and invest less. Saving becomes more attractive. A higher rate can also strengthen the currency, which makes imports cheaper. Together, these effects slow demand and ease the pressure on prices.
Why it takes time
Rate changes work with a lag. Economists often say the full effect on inflation takes a year or more, because loans, wages and prices adjust gradually. That is why central banks look at forecasts, not just this month's numbers.
Targets and trade-offs
Many central banks aim for low, stable inflation. The US Federal Reserve and the European Central Bank target 2 percent. Bank Indonesia works toward an inflation target range set together with the government.
Raising rates too far can slow the economy and cost jobs, while cutting too early can let inflation return. Central banks publish their decisions and reasoning so that businesses and families can plan.