SpaceX Could Lift a Big U.S. Stock Index by About 1%

SpaceX alone could add about 1% to a U.S. stock index, a Wall Street Journal article dated October 20, 2026 says. Indexes are scorecards of many companies' shares; most weight firms by total stock value. One large new company can move it, like a heavy kid tipping a seesaw. Gains can reflect a few firms, not the whole market.