Are market indexes abandoning traditional waiting periods for mega-cap listings?
Core argument: Nasdaq reduced SpaceX’s index inclusion waiting period to 15 trading days from 3 months, accelerating mega-cap integration and driving trillions.
Indexes built to track markets are now being asked to accommodate companies that are already too large to exclude by the time they arrive. To the index overlords who steer trillions of dollars in flows through the eligibility rules they set, adding a company like SpaceX is simply a matter of reflecting the market as it really is. Nasdaq changed its rules so SpaceX can join the Nasdaq 100 Index, a cohort of the largest non-financial companies listed on its exchange, in just 15 trading days, down from a three-month minimum. FTSE Russell adopted a similar approach, shortening the waiting time to five trading days, and S&P Dow Jones Indices is expected to decide soon following its own consultation on the subject, potentially opening the S&P 500 Index itself to welcome instant mega-caps like SpaceX.

