Peter Whoriskey

The Pandora Papers reveal an unprecedented flow of global investment into American suburbs. Wealthy investors profited as Progress Residential bought homes at depressed prices and rented them to middle-class families.

As treasury secretary, Tim Geithner criticized predatory lenders. Now the private equity firm he leads runs a company that mails high-rate loans to risky customers.

Created 10 years ago by a private-equity firm, USAP is now one of the largest in the U.S., with more than 4,000 doctors and spanning nine states. As it gobbled up existing practices, it dominated markets and big price hikes followed.

After the Carlyle Group orchestrated a deal for the nation's largest nursing home chain, investors extracted $1.3 billion but left the firm with untenable financial obligations and rising health-code violations.