Up 37% Since August, Is It Safe to Buy UnitedHealth Group Stock Again?

The health insurance giant's stock got a big boost after Wall Street learned Berkshire Hathaway had invested in it.For years, UnitedHealth Group (UNH +4.82%) has been one of the best growth stocks to own on the New York Stock Exchange. A leading health insurance company, it generated solid and continuous growth, and many investors viewed it as a safe stock to own and also a reliable dividend investment.However, it's been facing some considerable challenges of late, including rising costs and a Department of ...