S&P 500 ETFs to Exclude SpaceX After IPO, Sidestepping Short Squeeze
SPY•S&P Dow Jones will keep SpaceX out of the S&P 500 after IPO due to unchanged inclusion rules, so SPY ETFs will not be forced to purchase shares. Market participants warn that excluding SpaceX avoids short-squeeze volatility from its small float, while Nasdaq indexes may add it, creating performance divergence.
1. Unchanged S&P Inclusion Criteria
S&P Dow Jones has opted not to adjust the index’s eligibility standards introduced by other providers, requiring a minimum exchange listing and public float before inclusion. SpaceX’s IPO share count and float size fail to meet the minimum public float threshold, disqualifying it from SPY and related S&P 500 funds at launch.
2. SPY ETFs Exclude SpaceX After IPO
As a result, SPY and all ETFs tracking the S&P 500 will omit SpaceX shares following its public debut. Index providers will continue to rebalance S&P 500 constituents based on market cap and float-adjusted weightings, leaving SpaceX out until it satisfies standard criteria.
3. Potential Performance Divergence
Nasdaq-based ETFs that revise their rules are expected to include SpaceX swiftly, creating a split in performance drivers between major index funds. If SpaceX shares rally strongly, Nasdaq funds may outperform SPY, raising questions about fund selection and tracking error.
4. Short Squeeze Risk and Advisory Views
Market participants caution that SpaceX’s limited float could trigger forced buying and extreme volatility if included, a scenario SPY avoids by maintaining traditional rules. Financial advisors are recommending clients wait for float expansion and clearer profitability across SpaceX’s segments before making allocations.




