Discover why UnitedHealth Group Incorporated's recent challenges may present a generational buying opportunity. Click for my UNH stock update.

Investing legend Peter Lynch once noted, insiders can sell stock for any reason, but they but it for only one: they think the price is going to go up. Battered UnitedHealth Group (UNH) insiders just bought almost $1.6 million shares of the country's biggest health insurer at a time when UNH stock is down 50% in the past month.

UnitedHealth Group Inc (NYSE: UNH) remains in freefall as investors continue to bail on the healthcare giant amidst a cascade of bad news. First, it was the surprise exit of its chief executive, then the suspended full-year guidance,