Key Takeaways UnitedHealth Group shares surged Friday after Warren Buffett’s Berkshire Hathaway revealed a stake in the embattled healthcare giant.After bottoming at the start of August, the stock has continued to gain momentum,

Investing.com -- UnitedHealth Group Inc (NYSE: UNH ). stock rises 3% in premarket trading Monday, extending Friday’s 12% rally after Warren Buffett’s Berkshire Hathaway Inc . (NYSE: BRKa) disclosed a significant stake in the health insurance giant.

UNH stock soared after Warren Buffett’s Berkshire Hathaway revealed it bought shares of the healthcare company. Nonetheless, UnitedHealth faces a long list of unresolved issues.

The Food and Drug Administration approved Novo Nordisk's popular weight-loss drug Wegovy to treat a [form of liver disease](

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Year to date, the stock has fallen by nearly 45%, which is by no means normal for the healthcare stock. In fact, this is the worst it has performed since the Great Recession, when it tumbled by more than 54% in 2008.

UnitedHealth Group ( UNH 12.04%) has been a solid dividend growth stock for years. Generally, its yield has been fairly low, due to the stock's rising value. Even as the healthcare insurance giant has grown its dividend, its yield hasn't been particularly high or noteworthy.