Bullstory
May 31, 2026

S&P 500 Shiller P/E 42.04, nearing dot-com bubble levels

S&P 500’s Shiller price-to-earnings ratio (P/E) was recorded at 42.04. 155More than twice the annual average and 1999the dot-com peak of 44.19. When this indicator had exceeded 30, there were cases of subsequent declines of more than 20%.


S&P 500 Shiller P/E 42.04, nearing dot-com bubble levels

S&P 500’s Shiller price-to-earnings ratio (P/E) was recorded at 42.04. This indicator is used to assess stock price levels in light of long-term performance. The current figure is 155more than twice the annual average. The indicator is a widely referenced measure that investors use to understand long-term trends.

This figure is close to 1999the 12dot-com bubble peak in 44.19. 1999The peak in that year is recorded as a figure that symbolized the overvaluation of technology companies at the time. The proximity of the two figures has prompted analysis comparing the present with past episodes. Peak comparisons are repeatedly cited in discussions of market valuation levels.

Historically, when the Shiller P/E exceeded 30, the market subsequently saw cases of declines of more than 20%. This record was compiled from data spanning multiple periods in the past. In past cases, large corrections were repeatedly observed when the indicator was high. However, the timing and causes of declines differed from case to case.

The major AI-related companies leading this rally are profitable, unlike during the dot-com era. Some are reporting operating and net income. However, their revenue models and stages of growth vary. More companies are separately disclosing AI-related revenue and margin items in their earnings releases.

The article reported that the gap between valuation levels and earnings was cited as grounds for raising the possibility of a major correction. Concerns are being raised with a focus on the differences between indicators and corporate results. Even when looking at the same indicators, market participants interpret them and respond in different ways. More cases are emerging in which the relevant indicators and earnings are examined together.

Sources: The Motley Fool

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