Negative Activism

63 Pages Posted: 17 Mar 2019 Last revised: 8 Sep 2020

See all articles by Barbara A. Bliss

Barbara A. Bliss

University of San Diego

Peter Molk

University of Florida Levin College of Law

Frank Partnoy

University of California, Berkeley - School of Law

Date Written: February 25, 2019


Shareholder activism has become one of the most important and widely studied topics in law and finance. To date, popular and academic accounts have focused on what we call “positive activism,” where activists seek to profit from positive changes in the share prices of targeted firms. In this Article, we undertake the first comprehensive study of positive activism’s mirror image, which we term “negative activism.” Whereas positive activists focus on increasing share prices, negative activists take short positions to profit from decreasing share prices.

We develop a descriptive typology of three categories of negative activism and use a private database of activist activity and other hand-collected information to provide empirical evidence about the frequency and manner with which each category occurs. First, informational negative activism seeks to uncover and then communicate the truth about companies whose shares the activists believe are overvalued. We show that the announcement of this kind of activism is associated with a statistically significant abnormal decline in share prices. Second, operational negative activism involves dismantling or disabling sources of value at companies. We document a range of actual and potential instances of operational negative activism and associated abnormal share price declines. Third, unintentional negative activists are failed positive activists: their announcements of ownership stakes in companies they target are met with immediate negative abnormal returns.

Using this typology and the related evidence, we explore the policy and regulatory implications for each category of negative activism. We show a range of areas where policy and regulatory goals either conflict with or seemingly ignore the effects from negative activism. We also offer several ways that existing regulatory approaches could be improved to account for negative activism. In general, we advocate less regulation, and even subsidization, of informational negative activism; tighter regulation of operational negative activism; and a more nuanced approach to unintentional negative activism.

Suggested Citation

Bliss, Barbara A. and Molk, Peter and Partnoy, Frank, Negative Activism (February 25, 2019). 97 Washington University Law Review 1333 (2020), University of Florida Levin College of Law Research Paper No. 19-19, Available at SSRN:

Barbara A. Bliss

University of San Diego ( email )

5998 Alcala Park
San Diego, CA 92110-2492
United States

Peter Molk (Contact Author)

University of Florida Levin College of Law ( email )

P.O. Box 117625
Gainesville, FL 32611-7625
United States

Frank Partnoy

University of California, Berkeley - School of Law ( email )

215 Law Building
Berkeley, CA 94720-7200
United States

Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Abstract Views
PlumX Metrics