SpaceX IPO Could Trigger Historic Index-Fund Buying Frenzy, Says Indexing Veteran Rob Arnott - Tekedia

Rob Arnott says SpaceX’s planned IPO could trigger unusual index-fund demand instead of the typical post-inclusion weakness.

A very small public float could force passive funds to buy aggressively as SpaceX quickly qualifies for the Nasdaq 100 and later the S&P 500.

That could create repeated benchmark-driven buying from ETFs and index funds, especially from major passive players like BlackRock, Vanguard, and State Street.

The case may become a major test of how index rules and passive investing can move stock prices around a high-profile IPO.