UnitedHealth Group Incorporated stock drops after a rare earnings miss and CEO resignation. Click for the impact and potential buying opportunity in UNH at $335.

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

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

Por MICHELLE CHAPMANEl director general de UnitedHealth, Andrew Witty, dejará su cargo por razones personales y la aseguradora de salud más grande del país suspendió su

U.S. equities were mixed at midday, with tech shares and a better-than-expected consumer inflation report lifting the S&P 500 and Nasdaq.

UnitedHealth Group CEO Stephen Hemsley, returning to run the healthcare giant after Andrew Witty resigned, said he has the right strategy in place “for the era ahead.”

UnitedHealth Group surprises investors with what its CEO said was an "unusual and unacceptable" quarterly earnings miss, and lowers its outlook for the full year due to higher-than-expected medical costs, sparking a more than 20% selloff in shares that reverberated across the sector.

Shares in UnitedHealth Group fell nearly 8 per cent in premarket trading on Tuesday after the health insurance giant suspended its annual outlook and named a new chief executive.