How do central bank balance sheet reductions affect bond yields?
Core argument: Quantitative tightening announcements raise government bond yields by 4–8 basis points at horizons of one year and longer, steepening the yield curve, with more limited effects on most other financial market indicators.
QT announcements increase government bond yields (by 4-8bps at horizons of one year and longer), steepening the yield curve and potentially signaling a greater commitment to raising policy interest rates, but have more limited effects on most other financial market indicators. Active QT has a larger impact than passive QT, particularly on longer maturities. The implementation of QT has been associated with a modest rise in overnight funding spreads and a decline in the “convenience yield” of government bonds, but QT transactions did not significantly affect the pricing and market liquidity of government debt securities. Finally, we evaluate who buys assets when central banks unwind balance sheets. We find that increased demand by domestic nonbanks has largely compensated for reduced bond holdings by central banks. This series of cross-country results suggests that QT has had more of an impact than “paint drying”, but far less than simply reversing the effects of quantitative easing. Looking ahead, although QT has been smooth to date, frictions could increase in the future so that QT quickly evolves into more like watching “water boil.”



