If the S&P adopt those rules would there be any index fund that is S&P without the new rules?
I sincerely hope S&P and Nasdaq rollback the SpaceX-targeted changes, but unfortunately I seriously doubt it.
I checked and it looks like new stocks get added to the CRSP index at the next rebalancing, which is September. So, even the knockoff S&P adds it quickly.
BTW, CRSP was run by University of Chicago, but got sold recently to Morningstar, a mutual fund company.