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The S&P 500 Is Flashing a Warning Sign Not Seen Since the Dot-Com Bubble. Here's What History Says Investors Should Do.

The stock market could be entering shaky territory.

The S&P 500 Is Flashing a Warning Sign Not Seen Since the Dot-Com Bubble. Here's What History Says Investors Should Do.

Published July 20, 2026 · Category: Finance

Overview

The AI boom has lifted the stock market to new heights, with the S&P 500 (SNPINDEX: ^GSPC) doubling in the past four years alone.

However, tech stocks have been shaky in recent weeks, causing volatility in the broader market. The tech-heavy Nasdaq Composite (NASDAQINDEX: ^IXIC) is down more than 4% from its high, as of this writing, while the PHLX Semiconductor Index is nearing bear market territory, having fallen around 19% from its peak.

Details

Recent turbulence has renewed fears surrounding an AI bubble. Around 43% of fund managers believe AI stocks are in a bubble, according to Bank of America's most recent Global Fund Manager Survey, compared with 48% who don't.

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Source

Originally published at www.fool.com.

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Disclaimer: This article is for informational purposes only and does not constitute investment advice. Data may be delayed up to 15 minutes. Past performance is not indicative of future results. Consult a licensed financial advisor before making investment decisions.