On July 7, 2026, before the U.S. stock market opened, SpaceX (ticker code: SPCX) officially became a constituent stock of the Nasdaq 100 Index. From its Nasdaq listing on June 12 to being added to this globally most influential technology index, SPCX took only 15 trading days. This not only set the fastest inclusion record since the inception of the Nasdaq 100 Index, but also marked the first time in the index’s history that an aerospace-business-centered company was added. How could a company listed for only three weeks enter the world’s most core technology stock index in such a short time? What does this ultra-fast inclusion mean for the index’s structure, passive fund flows, and the broader capital market?

What is “15-day inclusion”: What changed under the fast-track rule

The reason SpaceX was able to be included in the Nasdaq 100 at a pace of 15 trading days is not special treatment, but rather is based on a new rule officially introduced in May 2026. Before this, newly listed stocks usually had to wait for a full quarter before they could be considered for inclusion in the Nasdaq 100. But the new rule created a “fast-track entry” for mega IPOs: newly listed companies that meet specific market capitalization thresholds can obtain inclusion eligibility after 15 consecutive trading days, without having to satisfy the traditional “seasoning” requirement.

SpaceX was the first beneficiary of this rule once it took effect. Nasdaq