The new Fannie Mae and Freddie Mac policy on loan-seller representations and warranties will likely burn off some of the fog that’s made mortgage lenders skittish about the product they deliver to the two government-sponsored enterprises, but it won’t eliminate industry buyback concerns. The new policy tinkers at the edges of the buyback safe harbor for loans with acceptable payment history. Loans with two 30-day late payments in the first three years can get a buyback waiver if they are current at the 36-month mark; until now such loans would only get a waiver if they performed for five years. More significant is...