American International Group this week cleared the air regarding a potential spinoff of its profitable mortgage insurance division, saying it likes the MI business very much and considers it a “core” asset. In other words, it’s not for sale. Then again, during AIG’s third-quarter earnings call, President and CEO Peter Hancock left open the door to a possible sale of United Guaranty, saying that “over time” the company likes to maintain its flexibility and that if the “right offer to monetize assets” came along, it would ponder a bid. “It gives...