S&P Global on Thursday reaffirmed its existing index membership rules, dealing a significant setback to SpaceX's ambitions for rapid inclusion in the S&P 500 – Wall Street's most widely followed benchmark – ahead of what is expected to be the largest initial public offering in market history.
The decision, reported by Reuters, means that the index fund managers collectively holding trillions of dollars in assets tied to the S&P 500 will not be forced to absorb SpaceX shares when the company debuts on the Nasdaq on June 12.
SpaceX has high hopes for what's shaping up to be its historic IPO, targeting a valuation of $1.75 trillion and a share price of $135.
S&P Global said that "exceptions to the financial viability, seasoning, and investable weight factor requirements should not be granted solely based on market capitalization," according to a statement released Thursday. The company had previously opened a consultation with investors on whether to loosen those requirements for megacap firms – a move that would have benefited SpaceX directly.
To join the S&P 500, a company must meet two financial hurdles: it must be profitable under Generally Accepted Accounting Principles (GAAP) in its most recent quarter, and it must have posted cumulative profitability across its four most recent quarters. SpaceX, despite a 33% revenue increase to $18.67 billion in 2025, reported a net loss of $4.94 billion for the same year, according to its IPO prospectus filed with the Securities and Exchange Commission.
Art Hogan, chief market strategist at B. Riley Wealth in Boston, said the decision reflects sound judgment from the index provider.
"It speaks highly of the credibility of S&P Dow Jones Indices to be rules-based and make sure there's profitability before entrance to the index," Hogan said in comments reported by Reuters. "Making exceptions because companies are so large and have been private so long yet are still not profitable, didn't make a great deal of sense."
S&P Global did soften requirements for its broader S&P Total Market Index and the Dow Jones U.S. Total Stock Market Index, opening a secondary pathway for SpaceX to be included in those less widely tracked benchmarks.
While the S&P 500 door remains closed for now, SpaceX is expected to enter virtually every other major U.S. equity index within days of its trading debut. The Russell 1000 has updated its rules to allow inclusion approximately one week after an IPO for qualifying companies. The Nasdaq 100 will apply a 15-trading-day window under its fast-entry provision – a rule change implemented on May 1 – which could place SpaceX in that index by early summer.
Read more: SpaceX's index fund debut will look nothing like what most investors expect, says Jacob Friedman
The accommodations made for SpaceX's early entry into indexes is set to trigger tens of billions of dollars in passive reallocations as institutions, index funds and exchange-traded funds absorb the new shares.
That matters directly for the millions of Americans with 401(k) plans invested in broad market index funds. Vanguard's Total Stock Market Index Fund, for example, adopted a fast-track rule allowing a qualifying IPO to be added after just five trading days of trading.
Rodney Comegys, chief information officer and head of global equity at Vanguard Capital Management in Malvern, Pennsylvania, said the scale of SpaceX's debut should not alarm retirement investors with diversified holdings.
"Mega IPOs reinforce the value of diversification," Comegys told Yahoo Finance. "Even the largest IPOs represent a small piece of a diversified portfolio. Diversification ensures investors participate in innovation and growth while reducing reliance on the success or timing of any single company."
Zachary Evens, a passive strategies research analyst at Morningstar in Chicago, echoed that view. "The impact to their portfolio is likely to be pretty small," Evens said. "SpaceX is a huge company in terms of the possible total market cap. The publicly available shares, however, [are] likely to be very small, so its impact on a total well-diversified broad market index is likely to be relatively small, especially in the short term."
For investors in target-date funds – which dominate 401(k)s and other employer-sponsored retirement accounts – the exposure will be even more limited, given that those portfolios carry meaningful bond allocations alongside equities, Evens noted.
Despite the S&P decision and some pointed skepticism about its valuation, SpaceX informed its underwriting banks Thursday that it intends to hold its $135-a-share IPO price – the figure disclosed in its amended filing – and is not moving the offering lower, according to sources cited by Reuters. The company's trading roadshow launched Thursday, with analysts fielding as many as 20 investor calls per day, well above the 10 to 15 typically seen on high-demand offerings, one source told Reuters.
Financial advisors weighing the SpaceX IPO have flagged valuation concerns since the company's prospectus was filed, particularly given that $1.75 trillion represents more than 100 times its reported revenue. Morningstar initiated coverage of SpaceX with a fair-value estimate of $780 billion – less than half the company's IPO target – a significant gap that analysts say reflects speculative premium rather than fundamental earnings power.
Michael Finke, professor of wealth management at The American College of Financial Services, raised concerns about what index inclusion at IPO price means for passive investors. "By convincing the index to let you in right from the start, SpaceX gets an instant flow of investment dollars without having to grow organically because it has a good business model," Finke told Yahoo Finance.
Mark Johnson, an investments and portfolio management fellow at Wake Forest University in Winston-Salem, North Carolina, said institutional investors routinely hold stakes in unprofitable growth-stage companies, and that the 401(k) exposure issue is not unique to SpaceX.
"There is probably a broader conversation around whether retail investors like me and you become exit liquidity in IPOs, but that is not unique to SpaceX," Johnson said.
For financial advisors counseling clients concerned about exposure, the practical message is nuanced: broad-market index fund holders will likely hold some SpaceX shares within weeks of the IPO, but the initial weighting will be thin.
As lockup restrictions on insider shares expire over the following months – SpaceX structured a staggered release schedule tied to earnings milestones and time-based windows – more shares will enter the float, gradually increasing the company's index weight.
Advisors tracking index fund exposure to mega IPOs should note that the Nasdaq 100 inclusion timeline puts meaningful passive buying pressure on SpaceX shares in the weeks following its June 12 debut, while S&P 500 inclusion still hinges on SpaceX achieving GAAP profitability – a bar the company has yet to clear on an annual basis.
"While several index providers have adapted their rules to allow for faster inclusion of very large IPOs, inclusion still occurs over defined windows and based on eligibility criteria," Comegys said. "For index investors, timing and investable size matter more than headline valuations."
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