The S&P Dow Jones Indices has officially proposed rule changes where megacaps like SpaceX will be included into the index in 6 months instead of 12 months. This would align also with the unlocking of shares of many SpaceX SPV investors after 6 months. When Tesla was included into the SP500 the shares went up 70%. There is a lot of mandatory buying of the stock by passive funds. About 10% of Tesla shares are held by passive funds. The biggest passive index funds is the SP500 funds. There would be more float when the shares unlock at the 15 day point and all shares should be unlocked by the 6 month point.
Proposed changes:
• Faster entry. Company would now only need to be public for 6 months (instead of 12 months) before being added to indexes
• Waive the minimum public float requirement (previously it was 10% float requirement)
• Waive the profitability requirement (no need for positive net income)
Huge news. The S&P Dow Jones Indices has officially proposed big rule changes for “MegaCap” companies that could fast-track companies like @SpaceX into the S&P 500.
Proposed changes:
• Faster entry. Company would now only need to be public for 6 months (instead of 12 months)… pic.twitter.com/1HYJ1NCPF1— Sawyer Merritt (@SawyerMerritt) May 1, 2026
If there is more float then there is more buying.
Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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