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The Stock Market Is Flashing a Major Red Flag Seen Only Once Before. Here's What's Different This Time.

How worried should investors be about high stock valuations?

The Stock Market Is Flashing a Major Red Flag Seen Only Once Before. Here's What's Different This Time.

Published September 1, 2026 · Category: Finance

Overview

The S&P 500 (SNPINDEX: ^GSPC) has been on a phenomenal run. The popular index has doubled since the start of 2023, producing huge returns for investors. If you go back further, the S&P 500 is up more than 1,000% from its March 2009 low, producing a 15% annualized return.

That's a tremendous run for the index, and some investors may be wondering if we're approaching a new market peak. That 2009 low was the culmination of a near-decade-long stretch in which the index fell around 50% before recovering, only to fall 50% again. And now, the market is flashing the same major red flag it did just before the so-called "lost decade."

Details

There are important differences between today's market and the stock market of the late '90s when we last saw this warning sign. But that doesn't mean investors can ignore it entirely.

Continue reading

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.