UnitedHealth tumbles 12% on WSJ report the DOJ is investigating Medicare billing practices

In this photo illustration the UnitedHealth Group logo displayed on a smartphone screen.UnitedHealth shares sank after The Wall Street Journal reported that the insurer's Medicare billing protocols are under Justice Department investigation.Shares of the Minnesota-based company slid around 11.5% before the bell. That slide weighed on Dow Jones Industrial Average futures, which were down nearly 200 points.The investigation is focused on UnitedHealth's Medicare billing practices, sources familiar with the mat ...