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The Federal Reserve (Fed) is expected to end its quantitative tightening (QT) program on December 1, 2025. The move marks the end of the Fed’s balance sheet reduction after years of efforts to withdraw liquidity from the financial system to combat post-COVID-19 inflation. Historically, the end of a quantitative tightening cycle has tended to coincide with an improvement in the index trend. While this development is a relatively positive sign for the S&P 500, it needs to be carefully analyzed in the context of the index already trading at historically high valuation levels.
– 1 Historical overview: usually positive turning points
In previous periods, notably 2012 and 2019, the end of quantitative tightening coincided with stock market stabilization and then gradually accelerated. The economic logic is clear: When the Fed stops cutting liquidity, pressures on financial conditions ease, and investors anticipate more predictable monetary conditions, this could signal the beginning of an easing cycle. Improving sentiment supported U.S. indexes in the coming months.
This is not a mechanical link, but an observable trend: the cessation of quantitative tightening removes the monetary tightening factor that has been weighing on valuation multiples.
– 2 Despite such signs, why should we remain cautious?
The current environment is different in several ways. First, valuation levels for the S&P 500 at the end of 2025 are near all-time highs, supported by a handful of major technology companies. This concentration means that some of the potential future upside is already priced in. Second, even if the Fed stops its quantitative tightening program, there is no guarantee of a quick interest rate cut or an immediate return to ultra-loose monetary policy. The central bank may prefer to maintain restrictive policies as long as inflation does not fall persistently towards its target.
Finally, investors will continue to face uncertainty: slowing global economic growth, pressure on margins in some industries, and geopolitical tensions that could lead to increased volatility.
-3 Why maintain an optimistic bias?
Despite these reservations, several factors justify cautious optimism. Stopping quantitative tightening could remove significant headwinds facing stocks. If inflation remains benign, the Fed will have greater flexibility, which could improve the economic outlook and support corporate profits. In summary, the end of quantitative tightening is not a guarantee, but it is a positive catalyst in the context of riskier market valuations.
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