As long as corporations can make a profit (low enough interest rate, high enough rent), they will continue buying the properties. It may be difficult to build f

As long as corporations can make a profit (low enough interest rate, high enough rent), they will continue buying the properties. It may be difficult to build fast enough to overwhelm their ability to buy, and in a large number of areas, the market isn't anywhere near saturated. With them holding the property, they push prices up for buying, which forces people into renting. It's a vicious cycle that just encourages them to buy more property. At some point the whole market may collapse, but hell, they may get a bailout.