The 21st Century Road to Housing Act became law without Trump’s signature. The 21st Century Road to Housing Act will cap big investors from buying more single-family homes. Under the law, large institutional investors that own 350 single-family homes or more will be barred from purchasing any new single-family homes, though they won’t have to sell the ones they have. “It is the first time that hedge funds have ever been told, ‘Here’s a line, don’t cross it,’ and that line is not buying any more single-family homes.” For the last three Congresses, Merkley had introduced bills to bar private equity investors from buying single-family homes.