http://www.321gold.com/editorials/casey/casey111009.html

What do you do if, as Andy thinks is the case, 85-90% of the entire commercial real estate market is under water relative to its financing? What happens to a property when its value drops way below the loan, a seller can't get enough money to get out, a buyer can't raise enough money to get in, and the bank can't afford to foreclose? Simple. It just sits there, carried along on the bank's books at some inflated "mark to fantasy" price that makes the institution's balance sheet look passable. The industry even has a catchphrase for the situation: "A rolling loan gathers no moss."