MarketsJul 6, 2026
SpaceX Joins Nasdaq-100, Sparking Billions in Passive Buying
Index Dynamics
Rhea Lobo
Discover
SpaceX officially joined the Nasdaq-100 on Tuesday, triggering roughly $5.4B in mechanical buying from index-tracking funds and landing in millions of passive portfolios whether investors wanted it there or not.
Mutual and exchange-traded funds holding a collective $800B in assets track the Nasdaq-100, including the Invesco QQQ ETF. Those funds bought SpaceX shares at Monday's closing price to mirror the index.
Despite a $2.1T market cap, SpaceX won't enter as a top-weighted component. SpaceX sold less than 5% of its total shares in its recent IPO, meaning only a small fraction of shares are publicly available to trade.
The Nasdaq adjusts weights by a company's free-float, so SpaceX will initially be treated more like a $300B company and carry an index weight of less than 1%.
SpaceX stock rose 2.5% in early trading after the company revealed Starmind, its plan for an orbital data center constellation.
The company, which merged with xAI in February, already rents AI computing capacity to Google and Anthropic for billions a year.
Starmind would deploy AI chips in space starting in 2028, using solar power and radiating heat into the vacuum of space to sidestep rising terrestrial energy costs.
SpaceX President Gwynne Shotwell also announced a stock donation to the Trump Accounts program on Monday.
The index addition has prompted a visible backlash from a segment of retail investors who want no exposure to Elon Musk.
Across Reddit and TikTok, investors have swapped advice on avoiding SpaceX, including moving savings into international index funds or switching to direct-indexing services that let them exclude specific stocks.
The anti-exposure crowd faces structural headwinds. Index providers made exceptions to their standard methodologies to accelerate SpaceX's inclusion, drawing criticism.
As employee lockups expire, passive funds are expected to absorb part of the selling pressure, much as they did following Facebook's IPO.
For now, SpaceX's float-adjusted index weight remains small, leaving analysts to believe its long-term performance will be driven primarily by fundamentals rather than passive inflows.
