S&P Dow Jones Indices has decided against altering its methodology to fast-track the inclusion of mega IPOs like SpaceX, Anthropic, and OpenAI into the S&P 500 index. The index provider stated that exceptions to financial viability, seasoning, and investable weight factor (IWF) requirements would not be granted based solely on market capitalization. This means companies must still adhere to the existing rules, which require a minimum of one year of public trading, four consecutive quarters of positive GAAP earnings, and a minimum market capitalization of $22.7 billion. This contrasts with Nasdaq's policy, which allows newly public companies to join the Nasdaq 100 within 15 trading days. The decision implies that SpaceX, if it meets all criteria, would not be eligible for inclusion in S&P indices until mid-2027. Critics had raised concerns that rule changes could compromise investor protection.