# S&P 500 delays SpaceX inclusion as index funds miss mega‑cap IPO

**Published:** 2026-06-12T20:00:12.506Z  
**Topic:** S&p 500 Performance  
**Sentiment:** neutral  
**Publisher:** TrendWatcher — https://www.trendwatcher.in/article/19412e49-f607-4321-884f-4cd040140bdc

Index fund investors won’t see SpaceX exposure until at least 2027 after the S&P 500 kept its 12‑month rule, while Nasdaq fast‑tracks the rocket maker.

SpaceX’s historic IPO is set to become the largest ever, but the S&P 500 index committee has decided to keep its standard 12‑month waiting period, meaning core S&P 500 ETFs will not hold the stock for years [2]. Nasdaq, by contrast, has already moved to fast‑track the company onto its Nasdaq 100 benchmark.  

**Key takeaways**  
- The S&P 500 index committee rejected a fast‑track rule change for SpaceX, keeping the 12‑month inclusion window [2].  
- Nasdaq and Russell have announced rule updates that will allow SpaceX to join their indexes shortly after the IPO [1].  
- Investors in Vanguard’s VOO, BlackRock’s IVV, or SPDR’s SPY will likely wait until mid‑2027 for any SpaceX exposure [2].  
- Proposed S&P 500 rule changes for “MegaCaps” would drop profitability and float‑size requirements, but they have not been adopted yet [1].  
- The decision could create performance gaps between the S&P 500 and other benchmarks that do include SpaceX [2].  

## S&P 500 sticks to its 12‑month rule while Nasdaq fast‑tracks  

The S&P 500 index committee, which oversees the inclusion of new stocks, voted to keep its existing rule that requires a company to trade for at least 12 months before being added to the benchmark. This means that even though SpaceX began trading on the Nasdaq on Friday and briefly pushed its market value above $2 trillion, the stock will not appear in the S&P 500 until at least mid‑2027 for investors holding the Vanguard, BlackRock or State Street S&P 500 ETFs [2].  

In contrast, Nasdaq has already amended its rules to allow a rapid addition of SpaceX to the Nasdaq 100, the index that tracks the largest non‑financial U.S. tech companies. The S&P 500 is also considering a set of “MegaCap” rule changes that would eliminate the profitability test, halve the waiting period to six months, and drop the 10 % public‑float requirement—though those proposals have not been approved and are slated for a May 28 deadline [1].  

## Implications for index‑fund investors and the broader market  

The divergent approaches have sparked debate among market participants. Some analysts argue that the S&P 500’s decision reflects a cautious stance aimed at preserving the index’s historical methodology, while others view it as a missed opportunity to give retail investors exposure to a high‑profile mega‑cap [2]. Todd Sohn of Strategas Securities notes that investors seeking SpaceX will need to turn to the Nasdaq 100 or Russell 1000, or to thematic ETFs that already hold pre‑IPO stakes in the company [2].  

Peter Haynes of TD Securities described the S&P 500’s move as “controversial,” suggesting it could lead to an “index war” with performance divergences between the S&P 500 and other benchmarks that adopt faster inclusion rules [2]. The decision also underscores a broader shift in how major indexes are adapting to the rise of ultra‑large, often unprofitable tech firms such as OpenAI and Anthropic, which are expected to follow SpaceX’s IPO later this year.  

## Why it matters  

For the millions of investors whose retirement savings are tied to S&P 500 index funds, the ruling means they will not benefit from SpaceX’s potential upside for several years, potentially widening the gap between S&P 500 returns and those of indexes that do include the rocket maker. The outcome also highlights the tension between maintaining traditional index criteria and accommodating the rapid growth of “mega‑cap” companies that may not meet historic profitability or float‑size thresholds. As the S&P 500 deliberates on its proposed rule changes, the market will watch closely to see whether future mega‑caps receive faster inclusion or remain subject to the existing waiting period.

## Sources
1. Axios — [The SpaceX IPO is already upending the stock market](https://www.axios.com/2026/05/14/spacex-musk-sp-stocks)
2. CNBC — [The S&P 500 already made a big call on SpaceX stock and index fund investors...](https://www.cnbc.com/2026/06/12/spacex-ipo-sp-500-index-funds-investors.html)
3. Investing.com — [Gold Is Down $1,000 Since January: Is the Bull Market Over? | Investing.com UK](https://uk.investing.com/analysis/gold-is-down-1000-since-january-is-the-bull-market-over-200625604)

---
Cite as: TrendWatcher, "S&P 500 delays SpaceX inclusion as index funds miss mega‑cap IPO", https://www.trendwatcher.in/article/19412e49-f607-4321-884f-4cd040140bdc