You know, it remains the case that the S&P committee can do whatever it wants. People keep talking about "forced buying" but the committee can simply say that they got feedback and decided to put off TSLA inclusion until the next rebalancing, and that maybe they'll spread it out over a year because it's causing such a ruckus. Poof! Forced buying evaporates.*
Anyway, there was unrelenting scorn for their behavior before, and then it all turned to love when they announced TSLA inclusion. Personally, I think they've always been Wall St. self-dealing financial scum and will continue to be so. Trusting them for anything is a sure path to getting screwed.
Be careful out there. Don't get blind-sided and then bleat "They can't do that!" I've seen no evidence that anybody here knows the true rules of the game. The only rule I know for sure is that the winners get to laugh at the losers.
*And yeah I don't actually know this can happen. But if you want to claim it's not possible, then point to the written policy and some further authority that the policy can't simply be waived.