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.

Stephen Hemsley ran UnitedHealth Group for more than a decade. It's a different company after four years with Andrew Witty in charge.

Former CEO and current chairman Stephen Hemsley is stepping back into the top job following the abrupt resignation of Andrew Witty, UnitedHealth said.

UnitedHealth Group, Inc. UNH has fallen nearly 50% over the past month, fueled by a series of negative catalysts. Several analysts have slashed price targets on the stock, but one analyst has seen enough and downgraded UnitedHealth on Wednesday.

UnitedHealth CEO Andrew Witty has stepped down unexpectedly, with former chief Stephen Hemsley returning amid stock plunge and ongoing federal scrutiny.

May 13 (UPI) -- UnitedHealth Group announced Tuesday CEO Andrew Witty will step down, citing "personal reasons." Witty will leave the role of CEO and be replaced by Stephen J. Hemsley, effective immediately.