Space Exploration Technologies (SpaceX) debuted on Wall Street with an initial public offering (IPO) that raised $75 billion, establishing it as one of the world’s largest companies. After only three trading sessions through June 16, the company achieved a $2.66 trillion valuation, surpassing major firms like Amazon and Broadcom. While early trading has shown significant gains, a unique lockup period for SpaceX stock could present substantial risks for retail investors.
Several factors contributed to SpaceX’s initial market success. Structural changes to major index inclusion rules and a historically low float are primary drivers behind the stock’s rapid ascent since its June 12 debut. These conditions have created an environment of high demand, but the impending lockup period introduces a different dynamic.
Before SpaceX went public, Nasdaq Global Indexes amended its rules for inclusion in the Nasdaq-100. Effective May 1, low float requirements were waived, and companies ranking among the 40 largest in the Nasdaq-100 became eligible for fast-entry inclusion after just 15 trading sessions. This significantly reduced the previous waiting period of approximately three months.
Less than four weeks later, the U.S. Russell Equity Indexes also revised its rules. Large-cap companies like SpaceX can now be added to the appropriate U.S. Russell Indexes after only five trading days, a change from the previous quarterly review schedule for newly public large-cap firms.
These structural index changes allow SpaceX fast entry into the Nasdaq-100, Russell 1000, and Russell 3000 indexes. This rapid inclusion forces passive funds that track these indexes to purchase SpaceX stock shortly after its IPO. This mandatory buying is expected to generate tens of billions of dollars in demand for the shares.
SpaceX sold approximately 555.6 million shares in its IPO, representing slightly over 4% of its outstanding shares. This is a considerably smaller percentage compared to most companies going public, which typically sell between 10% and 25% of their outstanding shares. This low float, combined with forced buying from passive funds, mutual funds, and 401(k)s, has contributed to the stock’s early price appreciation.
The current market conditions, driven by index rule changes and a limited supply of shares, have propelled SpaceX’s valuation. However, the eventual expiration of the lockup period could introduce a surge of new shares into the market. This increase in available shares, potentially from early investors and employees, could alter the supply-demand balance.
Investors should monitor the timing and terms of the lockup period’s expiration. A significant increase in the tradable float could test the market’s ability to absorb additional supply without downward pressure on the stock price, particularly for retail investors who entered the market during the initial euphoria.