The Stock Market Is Doing Something That’s Virtually Unprecedented — and History Shows There’s No Mistaking What Comes Next

May 31, 2026
the-stock-market-is-doing-something-that’s-virtually-unprecedented-—-and-history-shows-there’s-no-mistaking-what-comes-next

Despite a period of volatility in March, it’s turning out to be another banner year on Wall Street. In recent weeks, the iconic Dow Jones Industrial Average (DJINDICES: ^DJI), broad-based S&P 500 (SNPINDEX: ^GSPC), and technology stock-propelled Nasdaq Composite (NASDAQINDEX: ^IXIC) all rocketed to record highs.

There’s a lot piquing investors’ interests at the moment, including:

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  • The evolution of artificial intelligence (AI)

  • The advent and proliferation of quantum computers

  • The imminent initial public offering of SpaceX

  • Better-than-expected corporate earnings

  • Record S&P 500 share repurchases

But as history shows, the stock market doesn’t move higher in a straight line. While the Dow, S&P 500, and Nasdaq Composite absolutely have increased in value over the long term, Wall Street can take investors on some wild rides over shorter timelines.

A New York Stock Exchange floor trader looking up in bewilderment at a computer monitor.

Image source: Getty Images.

Based on one virtually unprecedented event that we’re witnessing right now, we appear to be on the verge of a big move in stocks.

Stock valuations are otherworldly

While there are several reasons to question the sustainability of Wall Street’s bull market rally, including record margin debt, a historically divided Federal Reserve, and the ongoing effects of Trumpflation, it’s the stock market’s otherworldly valuation that should give investors pause — especially in light of history.

To state the obvious, valuing individual stocks or the broader market isn’t black-and-white. Since value is entirely subjective, what one investor considers pricey may be a bargain to another. The subjectivity of evaluating and valuing stocks is one of the main reasons short-term moves in the Dow, S&P 500, and Nasdaq Composite are so challenging to predict with any sustained accuracy.

But there is a time-tested valuation measure that does an exceptional job of cutting through investors’ emotions and subjectivity to provide an apples-to-apples comparison of broad-market valuations: the Shiller Price-to-Earnings (P/E) Ratio, also known as the Cyclically Adjusted P/E Ratio (CAPE Ratio).

When most investors “value” a stock or the broader market, they use the traditional P/E ratio, which is based on trailing 12-month earnings per share (EPS). The problem with the P/E ratio is that it loses its usefulness during recessions when EPS can turn negative.

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