Security Breaches and Company Stock Prices

What impact will the recent security breach at Target have 
on the company’s stock prices over the next two years?

An article by Creighton University Heider College of 
Business professors, John Wingender, Vasant Ravel and Ed Morse, suggests
 abnormal negative stock price returns will most likely result for a company following the
 announcement of a credit card breach.

The article tiled “A Global Perspective” was published in
 the “Information and Security Journal” in 2011 and utilized data from 
breaches in a 10-year period involving various industries. The study found
the abnormal negative returns persist over the next several years.