(), the largest U.S. private real estate owner, accelerated purchases of single-family homes as () jumped faster than it expected.

Blackstone has spent more than $2.5 billion on 16,000 homes to manage as rentals, deploying capital from the $13.3 billion fund it raised last year, said Jonathan Gray, global head of real estate for the world’s largest private equity firm.

That’s up from $1 billion of homes owned in October, when Blackstone Chairman Stephen Schwarzman said the company was spending $100 million a week on houses.