Quantitative Easing

Quantitative easing involves the creation of a significant amount of new base money by a central bank by the buying of assets that it usually does not buy. Usually, a central bank will conduct open market operations by buying short-term government bonds or foreign currency. However, during a financial crisis, the central bank may buy other types of financial assets as well. The central bank may buy long-term government bonds, company bonds, asset backed securities, stocks, or even extend commercial loans. The intent is to stimulate the economy by increasing liquidity and promoting bank lending, even when interest rates cannot be pushed any lower.

Quantitative easing increases reserves in the banking system (i.e. deposits of commercial banks at the central bank), giving depository institutions the ability to make new loans. Quantitative easing is usually used when lowering the discount rate is no longer effective because they are already close to or at zero. In such a case, normal monetary policy cannot further lower interest rates, and the economy is in aliquidity trap.