UnitedHealth says it should have stayed out of the PPACA exchange system longer

December 1st, 2015 | By: Zachary Tracer (Bloomberg) – The biggest U.S. health insurer should have stayed out of the Patient Protection and Affordable Care Act (PPACA) exchange system longer, UnitedHealth Group Inc.’s chief executive officer said Tuesday, after the company said last month that it will take hundreds of millions of dollars in losses…