UnitedHealth Group’s stock surged after Warren Buffett’s Berkshire Hathaway bought 5 million shares. The company faced multiple setbacks and earnings misses, down 45% year-to-date. Berkshire’s purchase boosted the stock by nearly 10%. Former CEO Hemsley returned to address challenges, including a major cyberattack causing payment chaos. The company struggled amid public backlash and a recent earnings miss. UnitedHealth’s stock rise also lifted the Dow, previously contributing to its decline. CEO Hemsley acknowledged pricing and operational mistakes in recent earnings call. Anjalee Khemlani is Yahoo Finance’s senior health reporter covering pharma, insurance, and health policy.

Read more at Yahoo Finance.: UnitedHealth stock pops on Buffett’s Berkshire share purchase