By Mariam Sunny and Shashwat Chauhan (Reuters) -Shares of UnitedHealth Group surged more than 9% on Friday after a fresh investment from billionaire Warren Buffett's Berkshire Hathaway boosted investor confidence in the troubled health conglomerate.

Warren Buffett's modus operandi is to wait for price dislocations to present themselves. In a historically pricey stock market, locating value has been virtually impossible. Yet, with UnitedHealth Group stock losing more than half its value since the midpoint of April, a rare price dislocation has emerged.

Buffett owned UnitedHealth shares before selling his stake in 2010, though his Berkshire Hathaway recently acquired shares.

The Oracle of Omaha just took a $1.6 billion stake in the battered healthcare giant, sending shares soaring 9% after hours.

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

Shares of UnitedHealth Group are surging before the market open Friday as Warren Buffett’s Berkshire Hathaway disclosed that it recently purchased shares of the beleaguered insurer

UnitedHealth shares surged Friday after Warren Buffett’s Berkshire Hathaway revealed a stake in the embattled healthcare giant. Monitor these major chart levels.

UnitedHealth Group jumped nearly 4% on Wednesday, marking its fourth straight day of gains, and kept climbing after hours after the board approved a $2.21 per share quarterly dividend. The payment, set for Sept.