Institutional Investors' Trading Behavior in Mergers and Acquisitions
Georgia State University - Department of Finance
Georgia Institute of Technology - Scheller College of Business
AFA 2007 Chicago Meetings Paper
We investigate institutional investors' trading behavior of acquiring firm stocks surrounding merger activities for the period 1992 to 2001. We label investment companies and independent investment advisors as active institutions and banks, nonbank trusts and insurance companies as passive institutions. We analyze the trading behavior of active and passive institutions surrounding merger announcements and their eventual resolution. Our results indicate that active institutions significantly increase their holdings of acquiring firm stocks for mergers with higher announcement period abnormal return and this increase is more pronounced for stock mergers than cash mergers. Active institutions display preference for stock proposals at the merger announcement on the basis of their prior beliefs and this is explained by the "overreaction phenomenon." However, they update their beliefs between announcement and final resolution as more information arrives into the market. Finally, active institutions appear to correct their overreaction behavior by displaying their greater preference for cash proposals as compared to stock proposals at the quarter of eventual outcome. The trading behavior of passive institutions suggests that these institutions disregard the market response of merger announcement in trading acquiring firm stocks at the announcement quarter. The passive institutions gradually update their beliefs and utilize the information released at the announcement in rebalancing their portfolios at the final resolution.
Number of Pages in PDF File: 55
Keywords: Mergers, Institutions, Behavioral finance
JEL Classification: G30, G34
Date posted: March 14, 2006
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