S&P 500 CAPE Hits 39.6, Highest Since 2000 as 3.8% Inflation Raises Rate Risk
Updated
Updated · The Motley Fool · Jun 4
S&P 500 CAPE Hits 39.6, Highest Since 2000 as 3.8% Inflation Raises Rate Risk
3 articles · Updated · The Motley Fool · Jun 4
Summary
May's 39.6 CAPE ratio left the S&P 500 at its richest valuation since the dot-com crash, even after the index climbed 20% from late March and posted nine straight weekly gains.
April PCE inflation accelerated to 3.8%—a three-year high—while first-quarter GDP grew just 1.6%, a mix tied to oil-price pressure from the Iran war and tariff-hit spending and investment.
That backdrop has sharpened fears the Federal Reserve may tighten again, with futures traders pricing in at least one quarter-point rate increase over the next year.
History offers a warning: after monthly CAPE readings above 39, the S&P 500 averaged returns of negative 4% after one year, negative 20% after two years, and negative 30% after three years.
Profit margins hit a 15-year high in the first quarter and AI-driven productivity could support earnings, but the report says stretched valuations still leave stocks vulnerable to a sharp pullback.
Can the AI revolution justify stock valuations not seen since the dot-com bubble burst?
With stagflation threatening and markets at a peak, where can investors find shelter now?
As war fuels inflation, can central banks tame prices without triggering a global recession?
The S&P 500’s CAPE Ratio at a 140-Year Peak: Inflation, Fed Policy, and What Investors Should Do Now
Overview
As of mid-2026, the S&P 500’s Shiller CAPE ratio has soared to 39–40, marking its second-highest level in over 140 years and reflecting an extreme period of investor optimism and high prices. This historic valuation raises concerns about the market’s future, with some experts warning of a possible crash, while others argue that structural changes—like technology-driven profits, low interest rates, and higher corporate margins—may justify these elevated levels. The report highlights the tension between historical risks linked to high valuations and the belief that today’s market dynamics could support sustained high prices, creating uncertainty for investors.