S&P committee has decided to add TSLA all at once (and not in two tranches)
to the index. Funds will need to buy in by Friday Dec 18th.
14 trading days left
So likely scenario：
Dec. 11: Funds begin to sell other S&P 500 stocks
Dec. 14: Funds begin to buy $TSLA in earnest (with billions in unsettled
funds)
Dec. 18: Funds must finish
One big week to buy.
