CVS Health CEO Lynch steps down as national chain struggles to right its path

CVS Health CEO Karen Lynch has stepped down with company shares down 19% and the national drugstore chain struggling. Lynch will be replaced by David Joyner, who will attempt to steer the health care giant through a worsening environment of rising medical costs. CVS cut its financial expectations for the third time in August with all major pharmacy chains attempting to navigate a drastically changed landscape, facing competition online and elsewhere.