The European Central Bank at Work

How one central bank sets monetary policy for twenty-one countries, its famous crisis promise, and the era of negative interest rates.

The European Central Bank, or ECB, based in Frankfurt, sets monetary policy for all countries using the euro. Its main goal is price stability, defined as inflation of 2 percent over the medium term.

One policy, many economies

The ECB faces a unique challenge: it sets one interest rate for many economies that may be in different situations. If Germany is booming while Italy is in recession, no single interest rate suits both. This is a central tension of the monetary union.

“Whatever it takes”

During the eurozone debt crisis, interest rates on the bonds of countries like Italy and Spain rose sharply as investors feared they might leave the euro. In July 2012, ECB President Mario Draghi said the ECB was “ready to do whatever it takes to preserve the euro”, adding, “believe me, it will be enough”. The ECB then announced a programme to buy the bonds of countries in difficulty, under conditions. Bond yields fell sharply, even though the programme was never actually used. The promise alone calmed markets.

Negative rates and asset purchases

To fight very low inflation, the ECB cut its deposit rate below zero in 2014, charging banks to hold money at the central bank. It also launched large-scale bond purchases, known as quantitative easing, from 2015. Negative rates lasted until 2022.

The inflation surge

When inflation rose sharply in 2022, peaking above 10 percent in the euro area, the ECB raised rates at its fastest pace ever, lifting its deposit rate from minus 0.5 percent to 4 percent by September 2023. As inflation fell, it began cutting rates in 2024.

The power of a promise

Investors feared some countries might leave the euro, so they demanded high interest to lend to them. The ECB's promise to buy bonds if needed meant investors would not be left holding worthless debt. Confident the ECB stood behind the bonds, investors bought them again, and borrowing costs fell, without the ECB spending anything.

Thinking the ECB can tailor policy to each country

The ECB sets one policy for the whole euro area. Countries cannot set their own interest rates or devalue their currency, so they must rely on fiscal policy and structural reforms to handle local problems.

Key takeaways

The ECB sets monetary policy for all euro countries, targeting 2 percent inflation.
One interest rate must serve economies in different conditions.
Draghi's 2012 "whatever it takes" promise calmed the eurozone crisis.
Negative rates lasted from 2014 to 2022, followed by rapid rate rises to fight inflation.