S&P 500 P/E10 hits 37.9

The number here is the Shiller P/E — also called CAPE or P/E10. It asks a simple question: how expensive are U.S. stocks if you smooth earnings over 10 years instead of just using the latest quarter? That matters because ordinary P/E ratios can look cheap or expensive for temporary reasons. Right now the smoothed version is flashing something much louder — the S&P 500 is trading at a valuation level that has historically shown up only in the late-1990s bubble and, briefly, the 2021 melt-up. (ycharts.com) ### What is P/E10 actually measuring? CAPE takes the price of the S&P 500 and divides it by the average of the past 10 years of inflation-adjusted earnings. Basically, it is a way to strip out the business cycle. A normal forward P/E tells you what investors expect over the next 12 months. CAPE tells you how much investors are paying relative to(ycharts.com)tart asking whether enthusiasm has outrun fundamentals. (multpl.com) ### So where is it now? Public trackers are not all showing the exact same print, but they are showing the same message. YCharts has the S&P 500 Shiller CAPE at 36.48 for April 2026. GuruFocus shows 39.44 as of April 1, 2026. The differences come from timing and methodology, but both sit far above the long-run norm and near the highest readings ever outside the dot-com pe(multpl.com)nt is the same — this market is expensive on a historically rare basis. (ycharts.com) ### But aren’t earnings booming? Yes — and that is what makes this interesting. FactSet’s running Q1 2026 tally has S&P 500 earnings up 27.1% from a year earlier, which would be the strongest growth since Q4 2021. Even more striking, that number jumped from 13.1% at the end of March to 27.1% by May 1 as companies reported results. So this is not(ycharts.com)ally coming in very strong. (factset.com) ### Then why do valuations still look stretched? Because the earnings surge is not evenly spread across the index. FactSet says three Magnificent 7 companies — Alphabet, Amazon, and Meta — were the biggest contributors to the upward revision in first-quarter growth. That matters because an index can look healthy while leadership gets narrower underneath. If a handf(factset.com)g, the multiple on the whole market starts to depend on those few companies continuing to execute almost perfectly. (insight.factset.com) ### Where does AI capex fit in? The market is paying up partly because investors think today’s spending spree will become tomorrow’s earnings engine. The hyperscalers — Amazon, Microsoft, Alphabet, and Meta — have laid out enormous data-center and AI infrastructure budgets. Estimates floating around the market put that spending (insight.factset.com) is real, supply is tight, and the winners will own the bottleneck. The catch is that heavy capex always carries timing risk — the returns can arrive later than investors want. (ig.ft.com) ### Why does debt matter here? Because capex this large changes the financing conversation. If these companies keep spending aggressively, investors start watching balance sheets, free cash flow, and future borrowing more closely. That does not mean a debt problem is here now. It means the market has less room for disappointment when valuations are already elevated. At high CAPE(ig.ft.com)f growth merely slows from amazing to just decent. That is the hard part of expensive markets — expectations become the real asset being priced. ### Does a high CAPE mean a crash is coming? Not on a schedule. CAPE is much better at saying something about long-run return potential than about next month’s direction. Expensive markets can stay expensive for years. The late 1990s proved that. But historically, when investors buy at very high CAPE levels, the next decade’s returns tend to be weaker than when they buy at ordinary valuations. So the signal is not “sell tomorrow.” It is “future upside is being pulled into the present.” ### Bottom line This is a market with real earnings strength, real AI demand, and very real valuation risk. The story is not that prices are detached from reality. It is that reality now has to keep clearing a very high bar. (ycharts.com)