UnitedHealth Group's (NYSE:UNH) stock saw a significant decline on Friday morning following a report from The Wall Street Journal revealing that the U.S. Department of Justice (DoJ) has initiated a new investigation into the company's business practices.

UnitedHealth Group shares tumbled early Friday on a report that the U.S. Department of Justice has started an investigation into the health care giant’s Medicare billing practices

In this post-shooting and DOGE-era, regulators may be emboldened to make more changes than they otherwise would have on insurers that are seen to be fleecing the system,” explained one analyst.

The stock is having its worst day in five years, even as the company denied any new Justice Department investigation and a Mizuho analyst recommended buying.

Key Takeaways U.S. equities dropped at midday following the latest data on consumer sentiment and a report that UnitedHealth Group is under a federal probe. UnitedHealth Group is said to be facing a Department of Justice probe of its Medicare billing practices.