S&P will not change the rules to allow SpaceX into its benchmark index early

The S&P said Thursday that it's not changing its rules to fast-track mega-cap IPOs onto its marquee stock index, the S&P 500.Why it matters: S&P's decision doesn't mention SpaceX, but it means that Elon Musk's company — as well as Anthropic and OpenAI, if they go public as expected — won't be making it into the index for at least a year.And it's a surprise, coming after other major indexes drew fire for changing their rules to more quickly accommodate Elon Musk's company.The big picture: Million