Quantitative Tightening

What Is Quantitative Tightening?

Quantitative Tightening (QT) is the reverse of Quantitative Easing. When a central bank — most prominently the US Federal Reserve — conducts QT, it stops reinvesting the principal repayments on the bonds it holds. As those bonds mature, cash flows back to the central bank and disappears from the financial system rather than being recycled into new purchases.

The Fed can also conduct active QT by selling bonds outright on the open market, though this is rarer and more disruptive. The passive runoff approach is the preferred method because it is more predictable.

Why Does It Matter?

QT drains bank reserves and reduces the money supply. The direct effects include:

• Higher yields: With the Fed no longer a price-insensitive buyer, bond prices face downward pressure and yields rise.
• Tighter financial conditions: Mortgage rates, corporate borrowing costs, and risk asset valuations all respond to higher underlying yields.
• Reduced liquidity: Less cash in the system means less capital available to chase risk assets, which historically weighs on equities, credit, and crypto.

QT vs Rate Hikes

Rate hikes and QT are complementary tools. Rate hikes directly raise the overnight borrowing rate; QT attacks the quantity of money rather than its price. The two operating together represent a double tightening of financial conditions. The Fed ran QT from 2017–2019 and again from mid-2022 onward.

The Reverse Repo Connection

QT is often tracked alongside the Fed's Overnight Reverse Repo (RRP) facility. During QT, when money market funds draw down their RRP balances to absorb the shrinking supply of reserves, the effective tightening impact is cushioned. Once RRP balances approach zero, QT begins to bite bank reserves directly, which is the more dangerous phase.

What to Watch

• The pace of QT (monthly runoff caps for Treasuries and MBS)
• Reserve levels at the Fed — when reserves fall below ~$3 trillion, stress can appear
• Any Fed commentary signalling a pause or end to QT