Shark repellents and the role of institutional investors in corporate governance

This paper examines the role of institutional shareholders in monitoring managers when they propose antitakeover charter amendments (shark repellents). These proposals provide a rare opportunity to examine this issue since they can be adopted only by shareholder approval. We document a positive relationship between the ownership of institutional shareholders and the stock market reaction to the announcement of antitakeover amendments. This finding is consistent with the Demsetz (1983) and Shleifer and Vishny (1986) proposition that large blockholders reduce the free‐rider problem associated with monitoring managers.