SpaceX Lands in the Nasdaq-100: What It Means for Everyday Index Fund Investors

Index funds have long been promoted as one of the simplest and safest ways to invest. Instead of trying to pick winning stocks, investors buy a broad slice of the market and let it grow over time. But when a company as polarizing and enormous as SpaceX gets fast-tracked into a major benchmark like the Nasdaq-100, it raises uncomfortable questions. Could a single stock threaten the stability of funds that ordinary people depend on for retirement?

How SpaceX Got Into the Nasdaq-100 So Quickly

Shortly before SpaceX went public, Nasdaq changed its rules for the Nasdaq-100 index. Under the revised guidelines, a newly public company that is large enough can join the benchmark on its fifteenth day of trading. According to Reuters, that rule change was requested by SpaceX itself.

When SpaceX officially joined the Nasdaq-100 on July 7th, index funds tracking that benchmark were obligated to buy shares. Interestingly, the stock closed down on July 6th, the day before inclusion. There is a structural explanation: because everyone knew index funds would have to purchase shares, banks and hedge funds likely positioned themselves ahead of time. Index rebalancing funds profited handsomely from the mechanics.

Research from Harvard Business School suggests that index fund buying contributed to SpaceX's initial IPO price pop. SpaceX is also just the first of several expected mega-IPOs. Anthropic and OpenAI are both anticipated to go public later this year, potentially adding even more AI-heavy weight to major indexes.

Why Inclusion Matters for SpaceX's Stock Price

Being part of an index fund provides a degree of price stability. Newly public companies often experience sharp swings. Facebook's shares, for example, dropped 25 percent the Monday after its 2012 IPO, triggering circuit breakers that temporarily halted trading.

SpaceX faces additional pressure from lockup periods. Employees cannot immediately sell their shares after an IPO, but those restrictions will expire. According to Bloomberg's Matt Levine, people with 180-day lockups will be able to sell more shares than were initially offered in the IPO once SpaceX publishes its second-quarter financial results, expected in mid-August. Index funds are likely to absorb some of that selling pressure, helping prevent the price from falling too sharply, as The Wall Street Journal noted.

SpaceX currently has a market capitalization exceeding $1.5 trillion, but the IPO sold less than 5 percent of the company's shares. Because of how Nasdaq adjusts its index weighting, SpaceX is treated as a much smaller component than its headline valuation might suggest. As more shares are released from lockup and potentially sold, the company's weight in index funds could increase, though selling pressure could also drive the price down.

Governance Concerns and Concentration Worries

One major source of controversy is the concentration of power in Elon Musk's hands. The CEO of CalPERS, a major public retirement fund, along with the New York state and city comptrollers, sent a letter to SpaceX criticizing its "novel and extreme governance structure." Musk holds the majority of voting rights, meaning shareholders have little ability to influence company decisions through proposals. SpaceX has also limited shareholders' litigation rights, further reducing investor recourse.

This situation highlights a broader concern about index funds: the largest indexing firms wield enormous voting power over the companies they hold. Some critics argue that index funds distort the market by making big companies even bigger, and some analysts have gone so far as to call them "worse than Marxism."

There is also the issue of sector concentration. Even before SpaceX entered the Nasdaq-100, the index was already heavily weighted toward AI-related companies like Nvidia, Apple, Microsoft, Amazon, Alphabet, Broadcom, and Meta. Burton Malkiel, whose 1973 book A Random Walk Down Wall Street helped popularize index funds, acknowledges that roughly 10 companies account for more than 30 percent of the market's value. However, he does not see this as a reason to abandon index investing. "The market's always been concentrated," he says.

Malkiel also points out that every major technological shift has been overhyped, from railroads to the 1990s internet boom, and AI is likely no different. He argues that because a very small minority of stocks drive nearly all market returns, owning the broad index ensures you capture those winners. Historically, the market has returned about 10 percent annually, but only about 4 percent of stocks are responsible for that performance. Since no one can reliably predict which stocks will succeed, Malkiel maintains that broad index investing remains the soundest approach for most people.

What Investors Should Watch Next

SpaceX has not been fast-tracked into the S&P 500, which operates under separate governance rules. This divergence could produce noticeably different returns between funds tracking the S&P 500 and those following the Nasdaq-100.

There are also political dimensions to consider. SpaceX president Gwynne Shotwell donated company shares to Trump Accounts, investment accounts for children, with the president stating the donation was worth $325 million. That gesture ties SpaceX closely to political power in a way that may concern some investors.

For those who want to avoid SpaceX in their portfolio, ESG (environmental, social, and governance) funds are one alternative, since Musk's governance control would likely cause SpaceX to fail the governance component. However, ESG funds carry higher fees and historically underperform standard index funds. Malkiel also notes that someone avoiding SpaceX through ESG funds might still end up holding Tesla, given its electric vehicle business.

Ultimately, SpaceX's arrival in the Nasdaq-100 is a landmark moment that intersects investing, technology, and corporate governance in unprecedented ways. Whether it strengthens or complicates the case for index funds depends on your perspective. If you found this breakdown helpful, share it with friends or colleagues who might be wondering what SpaceX means for their retirement savings.

Source: The Verge