If everyone expected the price of the stock to remain the same or higher after the seasoning windows then why were those with the most to lose if it did not, lobby so hard to change the rules?
Also, what do you mean the 0.3% thing never happened? The ipo hasn’t happened yet, so obviously the index rebalance hasn’t happened.
Total market is meant to be total market. It isn't slicing out large caps, like the S&P 500. The assumption was new issues would be too small to matter. That's clearly changed.
> main issue for me is that the seasoning window was reduced
Seasoning really only matters nowadays in respect of lockups. Private markets provide a lot more price signal than we had previously.
> what do you mean the 0.3% thing never happened?
S&P 500 won't include SpaceX. The magnitude of the effect of including SpaceX would have been on the other of about 0.3% for the S&P 500. (The other indices collectively matter less than individual allocators at e.g. BlackRock and Fidelity.)