Senators Elizabeth Warren and Ron Wyden are asking the DoJ and FTC to "thoroughly investigate" the pending deal, which they claim would "entrench existing antitrust and price manipulation concerns that have been at the center of mounting litigation."

Unlisted founder Katie Hill believes off-market is the solution to real estate's long-standing inventory problems. But her idea has been tried before.

Zillow reports that, despite an unusually active fall market this year, the housing market has finally settled into a slower pace for winter and returned to seasonal norms.