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UnitedHealth Group is scheduled to report second-quarter results on Tuesday morning, capping a tumultuous first half of the year for the health insurance giant.

Mizuho's Jared Holz joins 'Fast Money' to talk the future of UnitedHealth after the stock slides on news of DOJ probe.

Stocks were mixed Thursday. The Dow Jones Industrial Average fell more than 300 points after Honeywell and International Business Machines slumped on quarterly earnings updates, and as UnitedHealth Group traded lower after saying it was “complying with formal criminal and civil requests” from the U.

UNH braces for a 27% earnings drop in Q2 as soaring medical costs, margin pressure and investor jitters weigh on performance.

Jeff Jonas, Gabelli portfolio manager, and John Ransom, Raymond James director of healthcare research, join 'Power Lunch' to discuss each expert's thoughts on UnitedHealth amid its recent plunge.

Once considered a reliable bet, the health care behemoth has lost its appeal following a series of management missteps. UnitedHealth’s stock has fallen more than 40% so far this year. Independent CMS audits confirm that UnitedHealth’s practices are among the most accurate in the industry, the company said.

The U.S. Department of Justice’s (DOJ) criminal healthcare-fraud unit has intensified its investigation into UnitedHealth Group Inc’s (NYSE:UNH) Medicare billing practices, focusing on how it leveraged doctors and nurses to boost government payments.