The Harvard Law School Forum on Corporate Governance https://corpgov.law.harvard.edu The leading online blog in the fields of corporate governance and financial regulation. Tue, 14 Apr 2026 11:31:36 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.8 https://corpgov.law.harvard.edu/wp-content/uploads/2024/02/cropped-photography-4-e1706898544564-1-32x32.png The Sustained Negative Impacts of Cyber Incidents on Shareholder Value – The Harvard Law School Forum on Corporate Governance https://corpgov.law.harvard.edu 32 32 The Sustained Negative Impacts of Cyber Incidents on Shareholder Value https://corpgov.law.harvard.edu/2026/04/14/the-sustained-negative-impacts-of-cyber-incidents-on-shareholder-value/?utm_source=rss&utm_medium=rss&utm_campaign=the-sustained-negative-impacts-of-cyber-incidents-on-shareholder-value https://corpgov.law.harvard.edu/2026/04/14/the-sustained-negative-impacts-of-cyber-incidents-on-shareholder-value/#respond Tue, 14 Apr 2026 11:31:36 +0000 https://corpgov.law.harvard.edu/?p=180035?d=20260413162833EDT Posted by Subodh Mishra, ISS STOXX, on Tuesday, April 14, 2026
Editor's Note:

Subodh Mishra is the Global Head of Communications at ISS STOXX. This post is based on an ISS-Corporate memorandum by Douglas Clare, Managing Director for Cyber Solutions at ISS-Corporate; and Jim Coggeshall, Executive Director for Cyber Risk Research at ISS STOXX.

Introduction

It is well known that cyber security incidents can have an immediate and meaningful impact on the share values of publicly traded companies. What’s less understood is the depth and duration of that damage and what kind of companies suffer the most.

While a handful of studies have been put forward on the impact of cyber incidents on the shareholders of publicly traded firms, these analyses have largely been anecdote-driven rather than broad-based assessments.

A new study conducted jointly by ISS STOXX and ISS-Corporate examined the impact of reported cyber incidents on share values across the U.S. Russell 3,000 index over a three-year period from 2022 through 2024.

(more…)

]]> https://corpgov.law.harvard.edu/2026/04/14/the-sustained-negative-impacts-of-cyber-incidents-on-shareholder-value/feed/ 0