# Quantitative Tightening and Money Supply: 3 Funding Cases Quantitative tightening reduces a central bank's securities holdings through sales or by not replacing maturing assets. It can reduce bank reserves and public deposits, but the amounts need not match. Treasury cash movements, reverse repos and the identity of bond buyers determine which liabilities shrink. M2 is not the central bank's balance sheet. [Bank of England QT explanation](https://www.bankofengland.co.uk/monetary-policy/quantitative-easing). *By M2 Index Data Team. Sources checked 23 October 2026.* ## How does quantitative tightening reduce a central bank balance sheet? QT can work through active sales or runoff. A sale transfers an existing bond to a buyer. Runoff lets principal payments reduce holdings instead of reinvesting them. For example, the Fed's plan published on 4 May 2022 used monthly redemption caps to govern reinvestment. That historical plan illustrates the mechanism, not today's settings. [Federal Reserve balance-sheet reduction plan](https://www.federalreserve.gov/newsevents/pressreleases/monetary20220504b.htm). “Tapering” has a different meaning: purchases slow. If net purchases remain positive, holdings still grow. In our hypothetical arithmetic, buying $60 after previously buying $100 means slower expansion. Letting $60 of assets run off without replacement means contraction. These figures are illustrative USD amounts, prepared on 23 October 2026. Our [QE explanation](/quantitative-easing-vs-money-printing/) follows asset purchases. To reverse the entries accurately, you must identify both the asset leaving and the liability shrinking. ## What happens when the central bank sells a bond? A sale paid from a non-bank buyer's deposit can reduce both that deposit and bank reserves. The Bank of England describes active sales as one way to withdraw money created under QE. The outcome differs when a bank buys the bond for itself. [Bank of England: unwinding QE](https://www.bankofengland.co.uk/monetary-policy/quantitative-easing). **Our hypothetical USD example, prepared 23 October 2026, assumes a $100 sale at carrying value.** We omit interest, fees, tax, gains and losses. A household pays from a qualifying bank deposit; its bank settles with reserves. | Party at settlement | Asset change | Liability change | | --- | --- | --- | | Central bank | Bond −$100 | Reserves −$100 | | Commercial bank | Reserves −$100 | Household deposit −$100 | | Household | Deposit −$100; bond +$100 | None | The household has exchanged assets. The bank and central bank have smaller balance sheets. Under our assumptions, public deposits fall by $100. Now change only the buyer. If the commercial bank buys for its own account, its reserves fall by $100 and its bond holdings rise by $100. No household deposit needs to change. The same central-bank sale therefore has two different immediate deposit outcomes in our examples. ## Why does runoff depend on who funds the Treasury? When a Treasury security held by the Fed matures, Treasury pays from its Treasury General Account, or TGA. The Fed removes the security asset and reduces the TGA liability. The New York Fed's accounting explanation shows that this principal payment shrinks both sides of the Fed's balance sheet. [New York Fed: balance-sheet accounting](https://libertystreeteconomics.newyorkfed.org/2017/08/a-closer-look-at-the-feds-balance-sheet-accounting/). That redemption entry alone does not say how Treasury obtained the money. We extend our hypothetical example: Treasury raises $100 by issuing a new security, then repays $100 of Fed-held debt. The TGA finishes where it began. Ignore all other receipts, spending and interest. | Buyer funding the new Treasury issue | Net reserves | Net public bank deposits | Other Fed liability change | | --- | --- | --- | --- | | Household using its existing bank deposit | −$100 | −$100 | TGA unchanged | | Bank buying for its own account | −$100 | $0 | TGA unchanged | | Money fund using $100 released from overnight reverse repos | $0 | $0 after settlement | Reverse repos −$100; TGA unchanged | These are our constructed accounting cases, not measured shares of real Treasury auctions. In the final row, the money fund keeps its shares outstanding and changes its assets. It does not ask shareholders to redeem. Funds pass through settlement accounts, but those temporary balances disappear by the end of the sequence. The New York Fed explains that reverse repo operations move Fed liabilities between reserves and reverse repos. Releasing an existing reverse repo balance provides the offset in our final case. This requires an existing balance to draw down; it is not an unlimited source. [New York Fed reverse repo FAQ](https://www.newyorkfed.org/markets/rrp_faq.html). If Treasury instead uses an existing TGA balance without replenishing it, redemption first reduces the TGA. Our table deliberately fixes its ending balance so the funding difference stays visible. ## Why can reserves and M2 move differently during QT? Reserves are one central-bank liability among several. M2 covers eligible public money holdings. A change in reserves therefore cannot, by itself, establish the change in M2. The Fed reports these separately in [H.4.1 balance-sheet data](https://www.federalreserve.gov/releases/h41/current/) and [H.6 money-stock measures](https://www.federalreserve.gov/releases/h6/current/default.htm). A historical example shows the importance of other liabilities. In its February 2025 Monetary Policy Report, the Fed said reserves had changed little since runoff began because declining overnight reverse repo balances largely offset the drain. This describes that reporting period, not a permanent rule for QT. [Federal Reserve, February 2025 report](https://www.federalreserve.gov/monetarypolicy/2025-02-mpr-part2.htm). Our three refinancing cases explain how such differences can arise. Meanwhile, commercial banks can create or remove deposits through lending and principal repayment. A whole-economy M2 result combines those transactions with other changes. Use [how banks create money](/how-banks-create-money/) for that separate ledger and the [M2 definition](/glossary/m2-money-supply/) for what qualifies. Reserve quantity also matters for interest-rate implementation. A Cleveland Fed research commentary explains why an ample-reserves framework needs enough reserves to absorb shifts in demand. That is a question about operating financial markets, not a formula converting QT into consumer-price inflation. [Cleveland Fed research, 15 April 2025](https://www.clevelandfed.org/publications/economic-commentary/ec-202505-qt-ample-reserves-changing-fed-balance-sheet). ## How can you read a QT headline against money data? To compare quantitative tightening and money supply, match the claim to the ledger and period. We use the following checks to avoid interpreting every falling line as the same kind of monetary contraction. | Claim being checked | Evidence to inspect | What it cannot establish alone | | --- | --- | --- | | Central-bank holdings shrank | Securities holdings and reinvestment policy | Size of the deposit change | | Banks have fewer reserves | Reserve balances, TGA and reverse repos | Cause of the entire movement | | Public broad money fell | M2 or the relevant national aggregate | Contribution of QT alone | For US figures, H.4.1 distinguishes weekly averages from Wednesday levels. Keep the basis consistent across dates. H.6 measures a different set of balances. [Federal Reserve H.4.1 tables](https://www.federalreserve.gov/releases/h41/current/). Our [methodology](/methodology/) explains the site's data handling; the [monetary base glossary](/glossary/monetary-base/) and [inflation guide](/money-supply-and-inflation/) address the adjacent concepts. ## Frequently asked questions ### Does QT destroy money? It can extinguish central-bank liabilities and, in some transactions, customer deposits. Our household-buyer and bank-buyer examples show why “which money?” changes the answer. ### Does stopping QT mean starting QE? No. Keeping holdings steady differs from expanding them. Reserve-management purchases also have an operating purpose distinct from QE, as the St. Louis Fed explains. [St. Louis Fed: balance sheet and ample reserves](https://www.stlouisfed.org/publications/page-one-economics/2026/feb/fed-balance-sheet-and-ample-reserves). ### Must M2 fall whenever QT is underway? No. The bond transaction is only part of the deposit ledger. Other money-creating transactions can outweigh it. Our examples establish possible immediate effects, not a forecast of total M2.