Anthropic's IPO could set off forced buying by index funds. SpaceX shows how that played out.

SpaceX got into the Nasdaq-100 faster than any company in history. Then its stock fell 15% in its first week there. Anthropic (ANTH.PVT) could be next. The AI lab filed its IPO prospectus Monday and applied to list on Nasdaq under the ticker ANT. At the $1.5 trillion to $2 trillion valuation reportedly under discussion, it would clear the bar for the index's new fast lane with room to spare. That would put Anthropic in front of a buyer that can't say no. How the fast lane works Nasdaq's "fast entry" rule took effect May 1. A newly listed company that ranks among the 40 biggest in the Nasdaq-100 (NDX) by market value can join after 15 trading days. Under the usual rules, it would wait at least three full calendar months.