UnitedHealth Q3 Preview: Will Warren Buffett's Insurance Bet Keep Paying Off?

Health insurance company UnitedHealth Group (NYSE:UNH) has had a rally in shares in the third quarter, helped by news of Warren Buffett taking a stake. An earnings report Tuesday before market open could continue the rally or see shares give back some gains.Here are the earnings estimates, what experts are saying and key items to watch.Earnings Estimates: Analysts expect UnitedHealth to report third-quarter revenue of $113.06 billion, up from $100.82 billion in last year's third quarter, according to data f ...