SpaceX shares dipped below their $135 IPO offering price on July 7, 2026, the same day the company joined the Nasdaq-100 index, before recovering 2.4% intraday, according to Al Jazeera. The move briefly erased roughly $600 billion of market value. The inclusion came just 15 trading days after SpaceX's Nasdaq debut, the fastest addition to the index in its history, according to a Fox Business post.

The whipsaw is a fitting bookend to a listing that has been volatile since its first tick. SpaceX raised $85.7 billion through its Nasdaq listing, a figure Nasdaq's own newsroom described as a record, with shares priced up to $162.00 per unit under terms disclosed in the company's EU prospectus, approved by Germany's Bafin and dated June 5, 2026. The S-1, lodged June 4, had set trading to commence June 12 on Nasdaq and Nasdaq Texas under the ticker SPCX.

The actual offering priced at $135 a share, per Reuters. On debut day, the stock rose 19% and closed near $161, with more than 510 million shares worth roughly $84 billion changing hands — a turnover figure that alone exceeded the gross proceeds of most large-cap IPOs on record, per Reuters. By day's end, the company's market capitalization stood at $2.1 trillion, placing it among the largest publicly traded entities globally.

What followed was a compressed cycle of euphoria and drawdown rarely seen at this scale. Shares surged as much as 67% from the debut price before falling 35% off that peak, according to a Reuters analysis published June 23. On that same date, SPCX briefly traded below $2 trillion in market cap for the first time since listing, as the broader Nasdaq-100 shed over $1 trillion amid a tech selloff. Six days earlier, Bloomberg had already flagged the first down day for the stock following a three-day post-IPO rally, per Yahoo Finance. By June 18, shares were down 6.5% at $178.50 — still more than 30% above the offering price — after a near-5% decline the prior session, per Reuters.

The realized volatility here is the story for anyone marking positions to market rather than reading headlines. A stock that moves from a $135 offering to a 67% gain, then sheds more than a third of that gain, then flirts with its IPO price again inside a single quarter, is generating implied-vol readings that dwarf typical large-cap mega-cap issuance. Index-inclusion-driven flows compound that: JPMorgan estimated Nasdaq-100 inclusion could draw over $4 billion into the stock from passive and index-tracking funds, per Reuters. Mechanical buying of that magnitude, landing on a stock already prone to double-digit daily swings, is a recipe for exactly the kind of dip-then-bounce price action seen on inclusion day.

It is also worth noting SpaceX was unprofitable at the time of its debut, per Reuters. A $2 trillion-plus valuation on an unprofitable issuer is not unprecedented in growth-equity history, but it does mean the stock trades almost entirely on forward narrative and flow dynamics rather than trailing multiples — precisely the setup that produces the kind of realized-vol profile SPCX has shown since June 12.

For portfolio managers, the Nasdaq-100 inclusion changes the calculus meaningfully. Passive index funds and ETFs tracking the benchmark are now compelled buyers regardless of valuation view, and the speed of inclusion — 15 trading days, unprecedented for the index — compressed the usual adjustment window funds get to build positions ahead of an effective date. That mechanical buying pressure interacting with a stock already known for outsized daily moves explains both the initial slide below the debut price and the same-day 2.4% recovery. Options desks pricing SPCX skew will be watching whether that pattern of overshoot-and-recovery becomes a recurring feature of the name, or whether it settles as trading volumes normalize post-inclusion.

None of this tells anyone whether SPCX is over- or under-valued at current levels. What the record does show is a listing whose scale — the largest capital raise on record, per Nasdaq — has come with volatility to match, and an index-inclusion event that arrived faster than any predecessor, layering fresh flow dynamics onto a stock still finding its trading range barely a month after debut.