Josh Rosner, Hedge-Fund Adviser, Claimed Financial Disability

Wall Street analyst Joshua Rosner made a name for himself with prophetic warnings that Fannie Mae and Freddie Mac were ticking time bombs and that the U.S. housing market was heading for a collapse.

When the 2008 financial crisis hit, he became an ubiquitous presence on business news networks and a sought-after witness in Congress. He later co-wrote a best-selling book about the meltdown, which describes him on the back cover as an adviser to “global policy-makers and institutional investors.”

Yet as Rosner’s profile grew and, according to people familiar with the matter, he got work from prominent hedge funds ...