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Insider Trade

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Submitted By yayakillua
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What can we learn from insider trade?
Evidence from Thailand

Nareemet Kittikhuntanasan
Student ID: 5882942826

Project Advisor
Kanis Saengchote, Ph.D.
Committee
Tanakorn Likitapiwat, Ph.D.

Special Project Submitted in Partial Fulfillment of
The Requirements for The Degree of Master Of Science in Finance
Faculty of Commerce and Accountancy
Chulalongkorn University
Academic Year 2015
1. Introduction
In general, the insiders are classified as the persons who have more information than the other investors and make an abnormal profit from this unpublished information. Under the Securities and Exchange Act B.E. 2535 of Thailand defines the insiders as directors, executives, auditors, their spouse and minor child, and the owner of more than 10% of stocks. Since they have valuable information than the outsiders, they might use this knowledge for their wealth. Hence, the other investors might use the insider trading data as a signal infers future view of the firms and adjust their portfolios and strategies to make some profits.
Even though, there are many evidences supporting that insider trading is informative such as Aboody and Lev (2000) suggest that insiders make profit from their ability to acknowledge changed plan in the researcher and development budgets. Likewise, the paper from Jaffe (1974), Finnerty (1976) and Seyhun, (1986) support that insiders can make profit from their trading. However, many early literatures argue that there are market movement limitation when insiders trade in SEC, Lakonishok and Lee (2001). Their study is consistent with Eckbo and Smith (1998) which showing evidence that insiders lose their control in their benefits of trading.
In order to review timing ability of insiders, I examine the insider trading in Thailand because most prior literatures are studied in U.S. Market which is different characteristics from Thailand

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