Why Jeremy Grantham's GMO thinks the colossal tech IPOs expected this year could be bad for the stock market

OpenAI CEO Sam Altman

Justin Sullivan/Getty Images

• OpenAI, Anthropic, and SpaceX IPOs may put pressure on the stock market in 2026, GMO says.
• The firm predicts that increased IPO activity could pull money away from the rest of the market.
• The firm has predicted negative returns for the S&P 500 this year.

Investors are salivating at the chance to buy into private tech titans like OpenAI, Anthropic, and SpaceX when they potentially go public later this year...