The loan at the heart of a new foreclosure crisis | Planet Money

'One person's guess about how much a house will rent out for.' That's what some of these appraisals come down to, and it's fixable: real rent comps, and a cap on how many of these loans one borrower can stack. I'm less sold on the déjà vu with 2008, because these are loans to landlords against rent, in a market far smaller than the one that blew up then.