US justice department opens civil fraud investigation into UnitedHealthcare
1. DOJ investigates UNH's Medicare billing practices for alleged fraud. Effects may extend to regulatory scrutiny. 2. Allegations claim improper use of diagnoses to overcharge Medicare Advantage. This could shift investor sentiment. 3. Additional concerns include a major data breach and CEO murder amid intense public backlash. 4. News spurred a 10% early trading decline, heightening legal and reputational risks for UNH.