SpaceX's biggest IPO in history, and exchanges are all revising their rules. According to the Wall Street Journal, SpaceX is in talks with major index providers to get SpaceX included in indices faster than usual. Normally, even if a newly listed stock meets the market cap requirements, it has to wait a full year after IPO to be included in the S&P 500 and Nasdaq-100 indices. The rules being discussed are: For newly listed companies, as long as their market cap ranks within the top 40 of the current Nasdaq-100, they can be directly added to the index after just 15 trading days. The S&P 500 index is considering similar changes, completely skipping the normal "seasoning period" (usually a 1-year wait). Nasdaq is even going a step further, discussing the removal of the current 10% minimum float requirement for low-float stocks. Instead, stocks with <20% float would be weighted by their actual float percentage × 5 (capped at 100%). The upside of this is that index giants are breaking the norm for SpaceX, allowing it to be included in indices earlier. Many passive index ETFs (like SPY, VOO, etc.) would then buy in automatically, driving the stock price higher. The downside, however, is that these proposed rule changes completely contradict the strict rules of the S&P 500 (at least 50% float + 6-12 months wait + free float weighting). With such a short IPO timeline, shares haven’t fully matured yet, disrupting the normal price discovery mechanism and forcing passive investors to buy stocks that haven’t been tested by the market. It seems like if the rules are indeed changed, SpaceX’s stock price should perform well for a while after listing, but there could be massive selling pressure before the lock-up period ends.