Blackstone Group appears to be trying to oligopolize the business of renting single-family homes in the U.S.. As Bloomberg reports, after the housing crash left more than 7 million foreclosed homes in its wake, the investment firm has spent more than $7.8 billion purchasing about 41,000 single-family homes for rental conversion. The world's largest private equity firm has quickly become the largest landlord (of rental homes) in the U.S. and in October, Blackstone offered the first-ever "rental-home-backed" security on Wall Street. One has to wonder if this was the plan all along?