CSX tumbles 7% after CEO goes on medical leave (CSX)

CSX shares fell on Friday after the company announced CEO Hunter Harrison has taken medical leave. 
The company has appointed James Foote, its chief operating officer, as acting CEO. 
CSX hired Harrison in March to help turnaround the company, and concerns had been raised about his health.
 
Shares of the railroad-provider CSX Corporation tumbled in trading on Friday after the company announced that its CEO has taken medical leave. 
Hunter Harrison experienced "unexpected co