SpaceX (NASDAQ: SPCX) will join the Nasdaq-100 index at the open on Monday, July 7, 2026, less than four weeks after its record-breaking IPO. Analysts estimate the index rebalancing will force approximately $4.3 billion in mandatory passive buying as ETFs and mutual funds tracking the benchmark are required to add SPCX to their portfolios, according to analysis covered by 24/7 Wall St.
SPCX gained 2.83% to close at $162.00 on July 4-week trading, bringing its total advance to 20% above its $135 IPO price. Volume was 61.3 million shares. The stock's 52-week range runs from $135.00 at its June 12 listing to an intraday high of $225.64.
Why index inclusion matters for SPCX
The Nasdaq-100 tracks the 100 largest non-financial companies listed on the Nasdaq Stock Market by market cap. The Invesco QQQ Trust, the most widely traded ETF linked to the index, has more than $300 billion in assets under management. When a stock joins the index, every fund benchmarked to the NDX is legally required to own a proportional slice -- they cannot choose to opt out or phase in a position. That creates a concentrated, price-inelastic wave of buying on and immediately before the rebalance date.
Analysts at Benzinga estimated that passive inflows tied to the inclusion could reach approximately $4.3 billion in aggregate across all funds tracking the Nasdaq-100, based on SPCX's index weighting and total NDX-linked AUM.
SpaceX's IPO and business backdrop
SpaceX priced its IPO at $135 per share on June 12, 2026, raising $75 billion -- the largest U.S. public offering on record at the time, per CNBC. The stock opened its first day at $150 and closed at $161, a 19% gain above the offering price. The company was valued at $1.77 trillion at the IPO price; at $162 today, the implied market cap sits near $2.1 trillion.