Bank of America’s never-ending litigation woes spilled into 2015 as Ambac Assurance hit the bank with a new lawsuit related to toxic mortgages. Credit Suisse and Wells Fargo also welcomed the new year facing MBS lawsuits. According to analysts at Stone Fox Capital, an investment advisory firm, Ambac is claiming $600 million in losses, which arose from insuring approximately $1.7 billion in MBS transactions from 2005 to 2007. The MBS were issued by Countrywide Financial, which BofA acquired in 2008 and has been the principal cause of its legal headaches ever since. Ambac emerged...