Skip to main content

Quantitative Easing: How Central Banks Stimulate the Economy

By Imperialpedia Staff

Quantitative easing (QE) is a monetary policy tool in which a central bank purchases large quantities of government bonds or other securities, injecting liquidity into the financial system and putting downward pressure on long-term interest rates.

When Central Banks Turn to QE

QE is typically used when a central bank's standard interest-rate tool has limited room left to work — for example, when short-term rates are already near zero — but the economy still needs additional monetary stimulus. By buying large volumes of longer-term bonds, a central bank can push down longer-term borrowing costs even when it can't cut short-term rates any further.

How It's Meant to Work

By buying bonds, a central bank increases their price and lowers their yield, and adds newly created reserves to the banking system. The intended effect is cheaper borrowing across the economy — for mortgages, corporate debt, and other loans — encouraging spending and investment during a period of economic weakness.
IMPORTANT
The reverse process, in which a central bank reduces its bond holdings or lets them mature without reinvesting, is often called quantitative tightening, and tends to push in the opposite direction on interest rates and liquidity.

Related Articles