I don't think a stock market reaction is a good way to measure their impact on the housing market. It's not that they aren't involved in the market, it's that their impact is questionable given the relative size of their participation.

The tweet says blackstone. Thats a separate firm from blackrock. And the tweets misleading in the first place, it's looking at the bottom of a candle which wasn't even the current price at the time of the photograph? And the stock closed at about 154.

Besides all this says is that it matters for blackstone...not for the housing market at large.

A hit in the stock price doesn't prove or disprove their claims. What would disprove their claims is the number of properties Blackrock is buying and if it is affecting pricing at the margin.

Now explain Tesla stock.