From Forbes:

It sounds like Target is finally getting serious about security. Unfortunately, it’s a lot too late. Target’s reactive rather than proactive approach to data security has cost millions of breached consumers their peace of mind and shareholders a significant amount of value. The Ponemon Institute released a study this week that found the average cost of a breach for a company in 2013 was $3.5 million, with an average (global) cost per breached record of $145.