UnitedHealth Group ($UNH) stock rallied about 12% on Friday, as Warren Buffett’s Berkshire Hathaway (BRK.A) (BRK.B) and other hedge funds,

B stake in UnitedHealth Group Incorporated signals a market shift. Click for why I have now upgraded UNH stock to Buy.

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.

Shares of UnitedHealth Group opened at their lowest point since early 2020 as the health insurance giant's second-quarter profit came in worse than analysts had forecast.

UnitedHealth Group (NYSE: UNH) is a top health care stock with recent turbulence in earnings guidance, rising costs, and hedge fund activity.

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The Dow Jones Industrial Average opened at its first all-time high of the year on Friday as shares of health care giant UnitedHealth Group soared.

UnitedHealth Group Inc. (NYSE:UNH) shares climbed Friday after high-profile investors Michael Burry and Warren Buffett took positions in the insurance giant, offering some relief to a stock that has tumbled about 41% year-to-date.