Is UnitedHealth a Buy for Long-Term Investors?

Shares of UnitedHealth Group have experienced an epic sell-off over the last month.With shares down by more than 40%, UnitedHealth Group (UNH 2.50%) is the poorest-performing stock in the Dow Jones Industrial Average so far this year.Over the last month or so, there has been no shortage of storylines surrounding America's largest health insurers. And if the share price movements are any indication, most of the news isn't great.Let's dig into what has driven UnitedHealth stock off a cliff, and explore whethe ...