Wall Street anticipates SpaceX's IPO, but recent data shows many large debuts have lagged the S&P 500. Investors buying at IPO prices have seen lower returns than those in the S&P 500 index. High valuations, especially for AI companies, present risks.

Wall Street is abuzz with next month's expected blockbuster debut of Elon Musk's rocket and satellite maker SpaceX, but few of the biggest...

Wall Street anticipates SpaceX's IPO, but recent data shows many large debuts have lagged the S&P 500. Investors buying at IPO prices have seen lower returns than those in the S&P…