The health care giant's shares are down more than 50% in the last month. That's hurting the powerful U.S. stock-market index.

Stephen Hemsley hasn't been CEO at UnitedHealth Group in nearly a decade yet he's never really left. Since that day, the company's stock has fallen from $610 a share to $308 on Tuesday, an ...

UnitedHealth is almost as oversold as during the Great Financial Crisis, with its monthly RSI sitting at 33. Find out why UNH ...