Nasdaq changed its decades-old inclusion rules right before the SpaceX IPO. Here is the factual timeline
May 1, 2026: Nasdaq implemented a new rule allowing mega-cap IPOs to join the Nasdaq-100 after just 15 trading days.
May 20, 2026: SpaceX filed its S-1 for IPO.
June 12, 2026: SpaceX ($SPCX) went public.
July 6, 2026 (Market Close): Index funds like $QQQ will execute forced buying.
July 7, 2026: SpaceX officially joins the Nasdaq-100.
Note: The S&P 500 explicitly refused to change its standard 12-month waiting period rule.