The provocative theory is that the big banks have not paid enough in recent legal settlements to make amends for their role in stoking the subprime housing boom and bust. Hedge funds, contending that the banks have so far underpaid, have bought subprime mortgage-backed bonds, which they hope will rise in value. That would happen if Wall Street banks ultimately pay out a lot more money to settle other, more stringent litigation tied to these bonds. And the hedge funds holding the bonds may often be behind these more demanding lawsuits.
via Hedge funds sniff for even bigger payouts from bank — NY Times