The slumping stock prices of pharmacy benefit managers

Data:; Chart: Axios Visuals

The stock prices of the three large pharmacy benefit managers — Express Scripts, CVS Health (which owns Caremark) and UnitedHealth Group (which owns OptumRx) — aren't doing so hot in the past week.

Driving the news: Two of Trump's top health care officials, Scott Gottlieb and Seema Verma, recently made comments that criticized the practices of pharmacy benefit managers.