I suspect that people conflate "buying a house as an investment" with "investors bought a house", which is leading to the incorrect idea that hedge funds or private equity are somehow cornering the market.
I think the reality is that the main component of investor pressure is from people who hold onto an overly large/well placed home far past the point of utility, because they want to sell as late as possible and maximize their return. Follow that with small-time landlords, and then finally actual explicit investors buying homes as some kind of commodity. A lot of the dysfunction of capitalism (so-called "late stage capitalism") is induced by people trying to outsmart the market, time the market, etc. when they really don't have the knowledge or information to play such games.
I think the reality is that the main component of investor pressure is from people who hold onto an overly large/well placed home far past the point of utility, because they want to sell as late as possible and maximize their return. Follow that with small-time landlords, and then finally actual explicit investors buying homes as some kind of commodity. A lot of the dysfunction of capitalism (so-called "late stage capitalism") is induced by people trying to outsmart the market, time the market, etc. when they really don't have the knowledge or information to play such games.