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Fortune
Fortune
Eleanor Pringle

Even as stocks slide, Wall Street is at 'historically extreme valuations,' warns Apollo chief economist

A trader works during the Beta Technologies Inc. initial public offering (IPO) on the floor at the New York Stock Exchange (NYSE) in New York, US, on Tuesday, Nov. 4, 2025. (Credit: Michael Nagle/Bloomberg - Getty Images)

Markets are not in a comfortable place right now. The S&P 500 was down by more than a percentage at yesterday’s close, the Dow Jones by near the same, and the Nasdaq was down nearly 2%. The VIX volatility index, by contrast, is up more than 9%—suggesting the turbulence is far from over.

Even then, Apollo’s chief economist, Torsten Sløk, wrote this week the S&P is at “historically extreme valuations.” In a note to clients yesterday, Sløk charted the “Warren Buffett indicator” (U.S. stock market cap to GDP) against the Shiller cyclically adjusted price-to-earnings ratio.

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