Wall Street stocks ended mixed on Thursday, with gains in Cisco Systems following an upbeat forecast, while UnitedHealth tumbled after a report of a criminal investigation into the insurer.

Stephen Hemsley hasn’t been CEO at UnitedHealth Group in nearly a decade yet he’s never really left. Hemsley, 72, has remained chairman and a major shareholder in the health care behemoth — and now is back in the CEO

UnitedHealth stock offers high risk/reward potential amid challenges like CEO resignation & DOJ investigation. Learn more about UNH stock here.

FILE PHOTO: UnitedHealth CEO Andrew Witty testifies before a Senate Finance Committee hearing about a recent cyberattack at the company's technology unit and its impact on patients and providers, in this frame grab taken from video on Capitol Hill in Washington, U.S., May 1, 2024. U.S. Senate/Handout via Reuters/File photo

The S&P 500 teetered between gains and losses in a choppy session on Thursday as elation from the U.S.-China tariff truce tapered off, with UnitedHealth among the biggest losers after a report said the DoJ was investigating the insurer for fraud.

UnitedHealth Group's stock has plunged nearly 50% due to the CEO resignation, withdrawal of guidance, and ongoing legal issues, creating a potential buying opportunity. The stock is deeply oversold with an RSI of 15, trading below both the 200-day and 50-day moving averages, indicating capitulation.