Is the Stock Market About to Crash? 100 Years of Data Has a Surprisingly Clear Answer

Is the Stock Market About to Crash

When the numbers no longer make sense in the way that people have come to expect, a certain kind of quiet uneasiness descends upon the financial markets. Don’t panic just yet. Just a low hum of tension — visible in the way analysts phrase their outlooks a little more carefully, in the way investors hover over portfolios rather than checking them once a week like they used to. That feeling has been building through early 2026, and it’s hard not to notice it.

The S&P 500 had an incredible run. Three consecutive years of double-digit gains — the kind of performance that makes people feel clever for staying in the market, that makes financial television louder and more confident, that turns casual investors into converts.

DetailInformation
Index NameS&P 500 (Standard & Poor’s 500)
Index Symbol^GSPC / ^SPX
Current Price (as of early April 2026)~$6,582.69
Year-to-Date Performance+1.4%
52-Week Range$4,835.04 – $7,002.28
Current Forward P/E Ratio~22 (30-year average: ~17)
Current CAPE Ratio~39.85 (30-year average: ~28.5)
Last Time CAPE Exceeded 40Year 2000 (preceded dot-com crash)
Managing OrganizationS&P Dow Jones Indices
Reference WebsiteS&P Dow Jones Indices

In the first part of 2026, the index increased by an additional 1.4%, and many Wall Street analysts continued to predict another successful year. Then the momentum started to change, first subtly and then more forcefully.

Concerns about Iran, about AI spending plateauing, about an economy that had been sprinting for longer than felt natural — all of it started pressing down on investor appetite.

The short-term volatility is not what makes this moment truly worth analyzing. The markets fluctuate. That is not new. What’s harder to dismiss is what the longer historical data is pointing toward right now, because it’s pointing toward something it has only pointed toward once before in over 150 years.

The S&P 500’s forward price-to-earnings ratio sits at around 22 today, compared to a 30-year average of roughly 17, according to research compiled by J.P. Morgan. In a typical setting, that gap alone would draw attention. But it’s the CAPE ratio — the Shiller Cyclically Adjusted Price-to-Earnings ratio, which smooths out a decade of inflation-adjusted earnings to give a longer view — that has financial historians genuinely unsettled.

That figure is approximately 39.85. Its 30-year average is roughly 28.5. The last time the CAPE climbed above 40, the year was 1999, and the market was about to experience one of the most painful corrections in modern financial history.

Whether the current environment will take the same course is still up in the air. History doesn’t exactly repeat itself. But it’s possible that the similarity is more than coincidence, and investors who have been around long enough to remember the dot-com collapse are watching these numbers with something between caution and dread.

There’s a sense that the market has been running on fumes for a while — buoyed by AI enthusiasm, by a consumer that kept spending longer than models predicted, by a Federal Reserve that managed to thread a needle most economists thought impossible.

Now, all those tailwinds seem less strong. The price of oil has surged. Geopolitical instability has returned as a daily variable rather than an occasional shock. The market has been swinging on headlines — gains on ceasefire rumors, losses when the fighting intensifies — in a way that suggests confidence, not conviction, was what was holding prices aloft.

Prominent names have been saying as much. Mark Spitznagel, who has built a career anticipating catastrophic market events, has spoken openly about the possibility of an 80% crash following what he describes as a historic blow-off rally. Michael Burry, who became famous for predicting the 2008 collapse, has expressed similar concerns. Ray Dalio has been cautious but measured.

When so many seasoned, historically reliable voices are pointing in the same direction, it seems foolish to completely ignore them. However, it’s important to be cautious about reading too much into any one pundit’s prediction—these are people whose careers are partially built on being the one who called the crash.

When CAPE ratios reach these levels, the market does tend to decline, according to the more sober version of this story, which is based on the entire sweep of data rather than individual forecasts. Not always right away. Not always in a disastrous way. However, historically, the trajectory bends downward. Strong future returns are more difficult for stocks at this valuation, and there is little buffer against negative news.

However, none of this implies that panicking is the solution. In the past, the market has experienced shocks such as wars, oil crises, worldwide pandemics, and banking collapses. Looking back five or ten years later, the market has always recovered. More dependable than any single valuation metric, that pattern is arguably the most resilient signal in a century of data.

Running away is not a sensible reaction to all of this. It’s to examine closely. Quality businesses are currently trading at fair prices, and if the market declines, it usually offers the kind of entry point that long-term investors secretly hope for. Those who made purchases during the lowest points of 2009 or the worst weeks of 2020 weren’t careless. They were attentive and patient.

It’s not quite fear as I watch this moment play out. It’s more akin to the feeling that precedes a change in the weather: the sky isn’t quite the right color, the air pressure is shifting, everything appears normal on the surface, but there’s a hint of something approaching. It’s unclear from the data whether that storm is short-lived or long-lasting. However, having an umbrella is worthwhile.