Quantitative tightening or balance sheet contraction. It is another monetary policy instrument used by central banks for regulation. Quantitative tightening (QT) involves monetary policy measures that shorten the balance sheet of the US Federal Reserve (Fed) either by selling government bonds or by allowing them to mature. This process reduces liquidity on the financial markets and is intended to control inflationary pressure and prevent the economy from overheating. It is the opposite of quantitative easing (QE), in which the Fed takes measures to expand its balance sheet.