In a decisive move, the S&P 500 has denied fast-track entry for SpaceX, OpenAI, and Anthropic, reaffirming its existing criteria for inclusion in the benchmark index. This ruling means that SpaceX, despite its significant anticipated valuation, will not join the index in the near future. Investors may face delays, as the S&P 500 enforces its profitability rule, resulting in restricted passive fund inflows. Analysts predict that mega IPOs like SpaceX may have to wait years before gaining eligibility for the index, indicating a tough reality check for Elon Musk and potential investors.