Nouriel Roubini on the housing losses expected in 2011. Roubini says he is particularly concerned because of a recent study by Laurie Goodman of Amherst Securities, which shows 11 million borrowers are in danger of losing their homes, which is one of every five borrowers. He says this number is scary because previous estimates had shown the number to be 3-4 million for the next four years. Roubini says he has talked to experts in the housing industry who tell him the 11 million number is realistic. His overall sense is that the housing problems in the U.S. are "underappreciated," with banks facing about $1 trillion in housing related losses.