Opportunistic insider trading☆
نویسنده
چکیده
Article history: Received 22 June 2011 Accepted 23 July 2012 Available online 31 July 2012 This study proposes a simple framework to disentangle insiders' opportunistic trade from liquidity trade. An opportunistic trade occurswhen the probability of informed trading and the speed of convergence to market efficiency increase in a month of an insider transaction. Using Thailand Securities Exchange Commission (SEC) insider filing reports during 2002 to 2008 we find an average insider achieves merely 0.64% and 0.32% in a month after an insider purchase and sell but an opportunistic portfolio yields approximately 2%. © 2012 Elsevier B.V. All rights reserved.
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