Index funds, such as those run by Vanguard, are required by their own policy to hold all the components of the stock index that they track, and DJT.O was added to a major index.
The moment the company drops in value and falls out of the index is the same moment the index funds sell their holdings of it.
BlackRock is a huge hedge fund though.
The real batshit crazy part is that DJT.O was somehow deemed valuable enough to be included in an index despite having almost no revenue.
The only thing keeping the stock value up is the MAGA crazies pumping their money into it, magically thinking it’ll become profitable and make them rich.