Berkshire Hathaway’s UnitedHealth Group Incorporated investment highlights confidence in healthcare. Click for why I am bullish on UNH stock prospects.

Today, we're looking at Warren Buffett's Berkshire Hathaway's (BRK-B) decision to sell Apple (AAPL) shares while adding UnitedHealth Group (UNH) shares. Editor's note: This post was updated to reflect the proper name for UnitedHealth Group.

Buffett & Co. picked up UnitedHealth stock on the cheap, with the embattled blue chip one of the newest holdings in the Berkshire Hathaway equity portfolio.

UnitedHealth shares clocked the largest one-day percent increase since March 2020, as tracked by Dow Jones Market Data Group. It was on pace for the best day in 17 years before giving back some of those gains. For the week, shares rose over 21%, the best week since May 2009. Still, the stock is down more than 50% over the past 12 months.

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 blue-chip Dow Jones ended higher after hitting an intraday record high on Friday, as UnitedHealth's shares jumped after Berkshire Hathaway raised its stake, but other Wall Street indexes slipped as mixed data clouded the Federal Reserve's next monetary policy move.

Warren Buffett's Berkshire Hathaway built a $1.6 billion stake in UnitedHealth last quarter, marking one of its last wagers with the investor as CEO.