US Stock Market: SpaceX, OpenAI IPO excitement revives debate over lofty valuations

A Reuters analysis of the 50 largest IPOs over the past five years found that most underperformed the S&P 500 despite strong debut enthusiasm. As investors await SpaceXs expected blockbuster listing, analysts caution that high-profile IPOs often struggle to deliver sustained market-beating returns after going public.

May 26, 2026 - 09:00
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US Stock Market: SpaceX, OpenAI IPO excitement revives debate over lofty valuations
A Reuters analysis of the 50 largest IPOs over the past five years found that most underperformed the S&P 500 despite strong debut enthusiasm. As investors await SpaceXs expected blockbuster listing, analysts caution that high-profile IPOs often struggle to deliver sustained market-beating returns after going public.

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