Do Social Networks Facilitate Informed Option Trading? Evidence from Alumni Reunion Networks

Harvey Cheong, Joon Ho Kim, Florian Münkel and Harold D. Spilker

Journal of Financial and Quantitative Analysis, 2022, vol. 57, issue 6, 2095-2139

Abstract: Material private information transmits through social networks. Using manually collected information on networks of alumni reunion cohorts, we show that hedge fund managers connected to directors of firms engaged in merger deals increase call-option holdings on target firms before deal announcements. Effects are larger when reunion events for connected cohorts occur just before announcements. Independent directors, directors with short tenure, and directors with low stock ownership are more likely to transmit information. Our results are robust to confounding factors and alternative specifications. These findings highlight the role of social networks as channels of private-information dissemination.

Date: 2022
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