What is Quantitative Easing?
Quantitative easing (QE) is an unconventional monetary policy used when short-term interest rates are already near zero and conventional rate cuts are no longer effective. The central bank creates new reserves electronically and uses them to purchase government bonds and sometimes corporate bonds or mortgage-backed securities. The US Federal Reserve's QE programs between 2008 and 2014 expanded its balance sheet from roughly $900 billion to $4.5 trillion.
Effects on Financial Markets
By purchasing large quantities of bonds, QE pushes bond prices up and yields down, reducing borrowing costs across the economy. Lower yields on safe assets encourage investors to move into riskier assets like stocks and corporate bonds, boosting their prices. During the Fed's QE programs, the S&P 500 roughly tripled from its 2009 lows, though attributing all gains to QE alone oversimplifies the picture.
Key Considerations
Critics argue QE inflates asset prices without proportionally benefiting the real economy, widening wealth inequality. Unwinding QE (quantitative tightening) can destabilize markets if done too abruptly. The long-term consequences of massive central bank balance sheets remain debated among economists.