**SpaceX completed its record $85.7 billion IPO in June 2026 but faces firm S&P 500 barriers that explain the 98.5% implied probability against 2026 inclusion.** S&P Dow Jones Indices reaffirmed its unchanged eligibility criteria in June, requiring at least 12 months of public trading, positive GAAP net income in the most recent quarter and trailing four quarters combined, and a minimum 10% investable float. SpaceX reported a $4.94 billion 2025 net loss and further quarterly deficits in 2026, with profitability not anticipated before 2027. The initial float started near 4-5% and the seasoning clock only reaches mid-2027. Trader consensus, backed by real capital, prices in these structural hurdles. Tail risks remain limited to an abrupt profitability reversal or an unexpected policy shift by the index committee.