CVS Health Corp (NYSE:CVS) shares are trading lower by 2.1% to $66.04 during Tuesday's session. Shares of health insurers are trading lower in sympathy with UnitedHealth Group Inc (NYSE:UNH), which reported third-quarter financial results and lowered the upper end range of annual EPS outlook.

What To Know: UnitedHealth, which operates the Optum health services arm and the UnitedHealthcare insurance business, reported adjusted earnings per share (EPS) of $7.15, beating Wall Street expectations of $7.00.

This earnings growth came as the company expanded its domestic customer base by 2.4 million people in its commercial offerings and reported revenues of $100.8 billion, up by...