Home Depot Shares Drop After Chain Investigates Data Breach

Home Depot Inc., the largest home-improvement chain, fell the most in almost five months after saying it was working with banks and law enforcement to investigate a possible data breach.

“We’re looking into some unusual activity,” Paula Drake, a spokeswoman for the Atlanta-based company, said in an e-mailed statement. “We are aggressively gathering facts at this point while working to protect customers. If we confirm that a breach has occurred, we will make sure customers are notified immediately.”