Why Data Breaches Don’t Hurt Stock Prices

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Steven Moore for HBR, in 2015:

[…] even the most significant recent breaches had very little impact on the company’s stock price. Industry analysts have inferred that shareholders are numb to news of data breaches. A widely accepted notion goes that there are only two types of companies: those that have been breached and those that don’t know they have.

Why Data Breaches Don't Hurt Stock Prices

Recent high-profile data breaches like those at Target and Home Depot have exposed the private sensitive information of millions of employees and consumers. While consumers are rightfully worried that their personal information may be compromised, shareholders and companies' management have a wider set of concerns, including loss of intellectual property, operational disruption, decreased customer trust, tarnished brand, and loss of investor commitment.

https://hbr.org/2015/03/why-data-breaches-dont-hurt-stock-prices