A cluster of portfolio managers stood around screens on Thursday as S&P Global formally closed the door on a potential rule change that had been roiling market planners. S&P Global said it wouldn't alter S&P 500 eligibility requirements, effectively ruling out early inclusion for SpaceX even as the company pursues what it calls a $75 billion capital raise and a targeted $1.75 trillion valuation. The index provider said exceptions to its financial viability, seasoning, and investable weight factor requirements shouldn't be granted solely on the basis of market capitalisation, and it left intact the rule that a company must be profitable under Generally Accepted Accounting Principles in its most recent quarter and for the sum of its most recent four quarters. The decision preserves the S&P 500's existing eligibility framework.
On trading desks in New York and London fund managers watched S&P Global's announcement with relief and frustration in near equal measure. For passive managers the stakes are concrete: a change to the S&P 500 rulebook would have forced S&P-tracking funds with trillions of dollars under management to buy whatever tradable stock a newly listed mega-cap offered.
Why S&P stood firm
Inside S&P Global's investor consultations, officials tested several proposals that would have sped a giant company into the benchmark. Ideas on the table included shortening the one-year public-listing seasoning, waiving minimum free-float thresholds and relaxing the index family's profitability standards. After the review, S&P Global concluded such exceptions shouldn't be granted purely because a company is large by market capitalisation, and it kept the existing profitability test in place.
That test is strict. A company must be profitable under Generally Accepted Accounting Principles, both in its most recent quarter and for the sum of its most recent four quarters. S&P Global said that requirement remains relevant after noting SpaceX reported a net loss of $4.94 billion in 2025 even as revenue rose 33 percent to $18.67 billion.
S&P Global also warned that lowering the bar would have practical consequences for index-linked investors. Passive S&P 500 funds would have been compelled to allocate to SpaceX at scale, the firm said, a dynamic that could concentrate trading in a small pool of freely tradable shares and amplify market volatility.
Where SpaceX could still appear
For its part, SpaceX is pursuing what it calls a $75 billion capital raise and a targeted $1.75 trillion valuation. Market participants have focused on the company's likely public float, which reporting has estimated at about 2.9 percent if SpaceX lists at a $1.75 trillion valuation and roughly 3.8 percent if the company raises $75 billion and values itself at $2 trillion.
That limited float is central to S&P Global's concern: a small pool of tradable stock would leave index funds with material exposure concentrated in a thin market.
S&P Global signalled a narrower response rather than an across-the-board fast entry for mega-cap IPOs. It will proceed with modifications to entry rules for the broader S&P Total Market Index and the Dow Jones U.S. Total Stock Market Index, creating a route for SpaceX to appear in those less prominent benchmarks while keeping the S&P 500's core criteria unchanged. In short, SpaceX could find its way into other indices without displacing the methodology that governs the S&P 500.
Other index providers have taken different paths, amplifying the contrast with S&P Global's stance. Nasdaq has adopted fast-entry rules that permit newly listed mega-cap companies to join the Nasdaq-100 after a shortened eligibility window of 15 trading days.
FTSE Russell and the Russell indexes have also paved quicker routes into the Russell Top 500 and related benchmarks, with FTSE Russell enabling inclusion after the close of the fifth trading day following an IPO. The divergence means a newly listed mega-cap could appear in one major index very quickly while being excluded from another that uses more conservative entry tests.
Market strategists and ETF analysts have warned that these different approaches could produce material differences in investor exposure to a newly listed mega-cap. Art Hogan, chief market strategist at B. Riley Wealth, said the outcome showed the importance of a rules-based approach and the rationale for requiring profitability before S&P 500 admission. The implication is simple: where an index draws its line determines which funds must buy and when they must do it.
The S&P decision also highlights a tension between market engineering and market plumbing. Index providers can redesign their rulebooks to reflect fast-moving capital markets, but the mechanical effect on billions of dollars of passive assets is immediate. For the S&P 500, the conservatism is meant to protect the benchmark's investability and to avoid forcing large rebalances into thinly traded stock pools.
For SpaceX the practical path is now clearer and narrower. Immediate admission to the S&P 500 is off the table unless SpaceX meets the existing GAAP profitability and seasoning conditions. The company remains a candidate for other indices whose rules S&P Global plans to amend, and those placements would still change how some funds and strategies access the company.
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S&P Global said it will proceed with modifications to entry rules for the broader S&P Total Market Index and the Dow Jones U.S. Total Stock Market Index, creating a pathway for SpaceX to appear in those less prominent benchmarks even as the S&P 500 eligibility framework remains unchanged. Originally reported by CNBC.
This article was created with AI assistance.
