Jerome Powell has left office, and Kevin Warsh is now taking over as Fed chair. The immediate question for markets is simple: does a leadership change at the Federal Reserve usually trigger a short-term selloff in U.S. stocks?
Looking across five modern chair transitions over nearly half a century, the historical record does not point to one clean pattern. Using the S&P 500 close from the final trading day before each chair took office as the starting point, the five-case average came to +0.8% after 1 month, -5.0% after 3 months, -0.1% after 6 months, and +4.8% after 12 months. That average is heavily distorted by 1987. If Alan Greenspan’s first year is excluded, the 3-month average turns positive at +0.3%, while the 12-month average rises to +11.0%.
The 1987 handover dominates the short-term average
Greenspan took office on August 11, 1987, raised the policy rate on September 4, and then ran into Black Monday on the 69th day of his tenure. The Dow fell 22.6% in a single session. In the table cited by the source, the S&P 500 posted a -26.3% point-to-point return over his first three months, and the maximum drawdown within 12 months reached -33.5%, by far the worst reading in the sample.
The article argues that this crash should not be treated as a direct consequence of the chair transition itself. It was an extraordinary timing event. That matters, because a raw average suggesting that stocks tend to fall in the first three months after a new Fed chair takes over can be misleading if one case drives most of the result.
The other transitions were far less dramatic
Paul Volcker took over in August 1979 with inflation running above 11%. The S&P 500 was up 2.7% after one month, down 2.7% after three months, and up 16.8% after twelve months. The more painful market and economic effects of his policy stance showed up later, including the bear market that began in January 1980 and the deep 1981–1982 recession.
Ben Bernanke’s February 1, 2006 transition was much smoother. The S&P 500 gained 13.0% over his first 12 months, while the first subprime stress only began to surface 18 months later. Lehman Brothers’ collapse came two and a half years later. Janet Yellen, who took office on February 3, 2014, also inherited a relatively stable setup. Her first-year table readings were +3.5% after 1 month, +5.5% after 3 months, +8.0% after 6 months, and +15.0% after 12 months, with a maximum drawdown of just -7.4%.
Powell’s own transition on February 5, 2018 came with an early correction, but the source notes that the move had already started in late January. The market was reacting to a rapid rise in the 10-year Treasury yield and the unwind in volatility ETNs. Barclays’ figures showed a maximum drawdown close to -20% in his first year, yet the point-to-point 12-month result was only -0.9%.
Warsh is stepping into a different setup
The article says Warsh is inheriting conditions that resemble Bernanke’s 2006 starting point in some ways: the S&P 500 is near record highs, market concentration is elevated, the seven largest technology stocks account for a historically large share of index weight, and federal deficit pressure is rising. Another issue stands out even more. The independence of the Federal Reserve has become far more politicized.
Three risk points are highlighted. First, policy continuity between Warsh and Powell appears weaker than in recent handovers. The source says Warsh has publicly supported rate cuts, favored shrinking the Fed’s balance sheet, and questioned Fed independence. Second, the composition of the Fed’s Board may continue to shift over the coming months, creating a transfer of influence that the article describes as unusually hard to model with historical backtesting. Third, today’s starting valuation and market concentration leave less room for error.
Markets are watching the first FOMC meeting and Warsh’s wording
For traders, the source points to three signals to watch next: the tone of Warsh’s first FOMC meeting on June 16–17, his explicit comments on Fed independence, and whether he turns dovish early under pressure for rate cuts.
The broader takeaway from the historical sample is narrow but useful. A Fed chair transition, by itself, has not consistently meant an immediate drop in equities. The market’s starting point, the degree of policy continuity, and the first policy signals from the incoming chair have mattered more than the handover alone.