I don't care about being forced to own SpaceX if it's in the index, I do care about it being forced into the index before it's had a chance to settle, so that private investors can dump on me.
But that wasn't going to happen with the S&P 500, the proposal was to reduce inclusion time from 12 months to 6 months, and this did not pass. 6 months is more than enough time for price discovery to occur.
And even if it was added to the index immediately after IPO, index weighting in S&P is float weighted, SpaceX at IPO will have minimal float, and SpaceX would be ~0.125% of the index at IPO. Not much to matter.
But that wasn't going to happen with the S&P 500, the proposal was to reduce inclusion time from 12 months to 6 months, and this did not pass. 6 months is more than enough time for price discovery to occur.
And even if it was added to the index immediately after IPO, index weighting in S&P is float weighted, SpaceX at IPO will have minimal float, and SpaceX would be ~0.125% of the index at IPO. Not much to matter.