How a data breach affects the bottom line

A study shows how market falls when companies disclose they have been hacked

Cyber attacks are an increasingly common threat to business, with risk officers listing cybersecurity as their greatest concern and more than 2,200 confirmed data breaches in 2017, according to a new report from Verizon. The headlines about hacking often focus on potential harm to consumers whose data is stolen, but there hadn’t been a systematic analysis of the effects of cyberattacks on a company’s sales, market valuation and other metrics. A recent study does just that, though imperfectly.

Using events reported as cyber-breaches in the nonprofit Privacy Rights Clearinghouse, a team of economists from Singapore, Cyprus, Hong Kong and the US