Comment by triceratops

> S&P 500 claims to be the "best single gauge of U.S. large-cap equities"

Right...

> But if they exclude high-growth no-profit large-cap equities such as (Anthropic, OpenAI, SpaceX) from their index, then S&P is doing a poor job at what they claim to benchmark.

So it comes down to a difference of opinion between Standard and Poor's and tristanj. Go make the Tristanj500, include these companies, and make the same claim - "the actual best single gauge of U.S. large-cap equities". No one's stopping you.