SpaceX trading on Tuesday won’t have much to do with space or AI fundamentals. Elon Musk’s AI and space company is now in the Nasdaq-100, one of the best-known large-cap growth indexes that tracks the largest nonfinancial companies listed on Nasdaq. Being fast-tracked into the index reflects just how important privately held frontier AI companies, including OpenAI, Anthropic, and SpaceX before its June IPO, have become to the entire stock market.