Are All Independent Directors Equally Informed? Evidence Based on Their Trading Returns and Social Networks
Management Science, Forthcoming
40 Pages Posted: 1 May 2011 Last revised: 4 Dec 2013
Date Written: May 1, 2011
Abstract
We study the impact of social networks on the ability of independent directors to obtain private information from their firms’ executives. We find that independent directors socially connected to their firms’ senior executives earn significantly higher returns than unconnected independent directors in stock sales transactions. The networks effect on independent directors’ trading profitability is stronger in firms with higher information asymmetry and with more powerful executives. In addition, the trading returns of independent directors previously unconnected with firm executives increase after the arrival of a connected executive, and drop after the connected executive leaves the firm. Moreover, the net stock sales by connected directors predict future negative news for up to three quarters. As a comparison, the trading returns of connected and unconnected independent directors do not differ significantly in stock purchases. Taken together, our results suggest that social connections help independent directors gain access to private bad news information from firms’ senior executives.
Keywords: Social networks, insider trading, independent directors
JEL Classification: G34; G38; M48
Suggested Citation: Suggested Citation
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