Most readers would already be aware that UnitedHealth Group's (NYSE:UNH) stock increased significantly by 22% over

The sell-off phase in Medicaid provider UnitedHealth (UNH) is over. News that Berkshire Hathaway (BRK) took a position in UNH stock at anywhere from over $600 to as low as around $250 ended the stock decline.

UnitedHealth shares jump after Buffett and Burry invest, despite earnings miss and DOJ settlement in $3.3 billion Amedisys deal.

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.

Bloomberg journalists discuss today's biggest winners and losers in the stock market. Listen for analysis on the companies making news on Wall Street.

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

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