3 articles · Updated · Marcus on AI | Gary Marcus | Substack · Jun 5
Summary
S&P Dow Jones Indices left its S&P 500 IPO rules unchanged, denying any fast-track path that could have brought SpaceX into the index soon after listing.
The decision preserves the 12-month seasoning period and other existing hurdles, reflecting concerns that a rapid inclusion could force index funds to buy into a potentially inflated stock too quickly.
SpaceX would still need to satisfy the S&P 500’s profitability and public-float requirements; earlier reports said it posted a $4.94 billion net loss in 2025.
The move keeps passive S&P 500 funds from automatically absorbing a company targeting a roughly $1.75 trillion valuation, even as rival index providers have embraced faster entry for some mega-cap IPOs.