U.S. equities dropped at midday following the latest data on consumer sentiment and a report that UnitedHealth Group is under a federal probe.

Getty Images Amid the outrage, a group of UnitedHealth Group’s shareholders grew fearful of the backlash and sent a proposal to the health care giant last month demanding a report on the ...

UnitedHealth Group shares are tumbling Friday following a report that the U.S. Department of Justice is investigating the healthcare giant's Medicare billing practices.