SpaceX IPO Could Trigger Billions in Forced Buying Under Nasdaq’s New Rules

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Nasdaq-100 Opens Faster Door for Big IPOs Like SpaceX

In May 2026, the Nasdaq will change its rules for the Nasdaq-100 index to allow large companies launching initial public offerings (IPOs) to be included much faster—within 15 days. This change could impact companies like SpaceX and investors in the index.

Nasdaq has officially updated its Nasdaq-100 inclusion rules. 

Starting May 1, 2026, big companies that recently become publicly traded will be added to the index much faster – about 15 trading days after their initial public offering. This is a significant change from the previous rule, which required a three-month waiting period.

These changes were made after Nasdaq gathered input from a wide range of investors, including those who manage investments for others and individual investors. Nasdaq publicly announced the decision in a formal filing, which became available in early 2026.

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Nasdaq-100 Fast Entry Rule: What Changed and Why It Matters

The headline change is what Nasdaq calls “Fast Entry.” 

In the past, newly listed companies couldn’t be added to the Nasdaq-100 until a specific date. This meant that even well-known, successful companies sometimes weren’t included in the index for several months.

Nasdaq admitted this caused a mismatch between what investors expected and how the market actually performed.

With the new system, a company can qualify for Fast Entry if its market value is sufficiently high after approximately 15 days of trading.

Experts in the field generally supported this change, saying it would give a clearer and more up-to-date view of where investors are putting their money. A few suggested an even faster timeframe, noting that some other market trackers allow investments to be included after just five to ten days.

The updated rules also change how Nasdaq calculates market cap for eligibility. 

The ranking now includes all shares, both publicly traded and those not listed on an exchange. However, when calculating a company’s weight within the ranking, only the value of its publicly traded shares is used.

Low-Float Stocks and the End of the 10% Minimum

Another major update scraps the old 10% minimum free-float requirement. 

Previously, companies had to have at least 10% of their stock owned by the public to meet the requirements. That rule no longer exists.

In its place, Nasdaq introduced a graduated float factor adjustment. 

Stocks with a small number of shares available for trading can now be included in the index, but their influence is limited based on how many shares are actually being traded. As more shares become available, their weighting in the index will gradually increase.

Representatives from institutions favored this method, describing it as a sensible way to involve major companies without making the index difficult to copy or trade.

Nasdaq also replaced the old “10 basis point rule,” which triggered frequent ad hoc removals. 

Securities that fall below the top 125 in our regular quarterly reviews will now be removed. This change minimizes unexpected adjustments between reviews and provides fund managers with a more consistent and predictable timeline.

SpaceX IPO and the Billions That Could Follow Index Inclusion

The rule changes have sparked immediate speculation about SpaceX. 

Sawyer Merritt noted on X that if SpaceX went public, it could create a surge in demand for its stock. This is because index funds that follow the Nasdaq-100 would be required to buy shares as soon as SpaceX was added to the index.

The Nasdaq stock market is updating its rules to allow large companies to be added to its main index more quickly.

We’ve made some updates! Now, large initial public offerings (IPOs) can be included in our systems much faster – about 15 days after they become public, instead of the previous 3-month wait.

— Sawyer Merritt (@SawyerMerritt)

When Tesla was added to the S&P 500 in 2020, it provides a good example of what happened. The announcement quickly led to a huge surge in demand from funds that track the index.

Thanks to new Nasdaq rules and a 15-day window, SpaceX could potentially go public much faster. While there’s no set date for an IPO yet, these changes significantly shorten the possible timeline if the company decides to offer stock.

The Nasdaq-100 is now changing more rapidly, which investors in major tech companies should be aware of.

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2026-03-31 19:50