As CVS Health's new CEO David Joyner steps into the top job after Karen Lynch's quick departure on Friday, Wall Street analysts and some investors are questioning whether he has the right experience to turn around the Aetna health insurance business as it struggles with high medical costs. Joyner, who headed the company's Caremark PBM business since 2023, took over on Friday after being named to the job by the board of directors on Wednesday. In addition to Aetna and the PBM business, CVS has a large namesake retail pharmacy chain.
