Bank of America said it will spend $400 million just to implement the servicing changes it agreed to in a controversial proposed settlement with a group of investors in non-agency mortgage-backed securities issued by Countrywide Financial. The proposed settlement itself would cost the bank $8.5 billion, and BofA set aside another $5.5 billion to cover other possible buyback demands. Reckoning the cost of upgrading servicing systems has been a common theme in an industry that faces even bigger expenses from punitive charges. Ally Financial this week said it will cost the company ...