Big private companies like SpaceX, OpenAI, and Anthropic are about to go public, and your retirement savings may be quietly forced to buy their stock — bad for ordinary investors.

• These companies need to sell trillions in new stock, and the only buyer big enough is the money sitting in 401ks and index funds.
• Index funds don't pick what they buy — they just buy whatever is in the index, so getting added means guaranteed demand.
• Nasdaq changed its rules so these companies can qualify for the index, even if they normally wouldn't.
• SpaceX is first, with OpenAI and Anthropic close behind — together up to $4 trillion in new stock could land in retirement accounts within months.

Outlook: Expect these IPOs soon, with everyday retirement savers likely absorbing the risk whether they choose to or not.