"Justice Department Investigates UnitedHealth for Antitrust Concerns"

UnitedHealth Group Inc.'s stock fell over 2% after the Wall Street Journal reported that the Justice Department has initiated an antitrust investigation into the health-insurance giant, focusing on its relationships between the UnitedHealthcare insurance unit and its Optum health-services division. The investigation includes interviews with industry representatives to assess the impact of UnitedHealth's acquisitions of doctor groups on competitors and consumers. UnitedHealth, the dominant U.S. health insurer in commercial and Medicare Advantage markets, has faced previous legal challenges related to acquisitions.