A chainsaw-wielding Elon Musk and his budget-cutting “DOGE” gang say that so far they’ve cut $55 billion from the federal budget. But they could hike that by another 150% at one stroke by ending the massive overpayments made to the privatized Medicare Advantage program.

UnitedHealth Group Inc. (NYSE: UNH) shares are trading lower Tuesday after the Wall Street Journal reported that Senator Chuck Grassley launched an inquiry into the company's Medicare billing practices.