Quantitative tightening (QT) is a monetary policy step used to tighten liquidity conditions after a period of asset purchases. It reduces the size of the central bank’s balance sheet by letting maturing securities roll off without reinvestment, and, in some programs, by actively reducing asset holdings through balance-sheet runoff. This is the counterpart to quantitative easing (QE), which expands the balance sheet. ## How it works In practice, proceeds from maturing assets are not reinvested, so the total assets decline over time. Central banks may set rules or caps on the amount that can roll off in a given period to establish a predictable pace. The result is a smaller monetary base and lower reserve levels in the banking system. ## Context and usage QT is typically pursued after a period of stimulus and alongside or after moves to raise policy rates, with the aim of normalizing monetary conditions as inflation or growth evolves. The approach varies by country and economic circumstance. ## Market implications The reduction in reserve balances can influence short-term funding markets and government bond yields, as liquidity conditions tighten and banks adjust to a smaller balance sheet footprint. QT operates through the balance sheet rather than through direct rate changes, so its effects depend on pace, communication, and market dynamics. ## Risks and considerations While gradual, QT can still affect liquidity and asset pricing; if implemented too quickly or without clear guidance, it may heighten market volatility.
Example: After years of asset purchases, the central bank begins QT by allowing maturing Treasuries to roll off the balance sheet without reinvestment, gradually shrinking the size of its asset holdings.
Quantitative Easing (QE) · Central bank balance sheet · Balance sheet normalization · Unwinding the balance sheet · Monetary policy normalization