Data breaches affect stock performance in the long run, study finds

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A multi-year study on the stock price evolution for breached companies reveals that data breaches have a long-term impact on a company’s stock price, even if it’s somewhat minimal.

The study, carried out by the research team behind the CompariTech web portal, looked only at companies listed on the New York Stock Exchange (NYSE) that suffered and publicly disclosed breaches of one million records and over in the past three years.

In total, the list included 28 companies, such as Apple, Adobe, Anthem, Community Health Systems, Dun & Bradstreet, eBay, Equifax, Experian, Global Payments, Home Depot, Health Net, Heartland Payment Systems, JP Morgan Chase, LinkedIn, Monster, T-Mobile, Sony, Staples, Target, TJ Maxx, Under Armour, Vodafone, and Yahoo.

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