trading account of Another person in such a way as to take advantage of other persons by using positive material non- public information concerning RPC investment inSammakorn Public Company Limited (SAMCO

if the value of their investment decreases Source: Stanford Graduate School of Business Sustainable investment ในตา่งประเทศ SEC Classification : ใชภ้ายใน (Internal) 4 Negative spread Positive spread

management override of control. Research design : Tones of KAMs 363 different words in KAMs sections are categorized into five-word categorizations: uncertainty, litigious, negative, positive, and neutral

sizes will be different depending on the value of expected return and standard deviation. 𝑆𝑡 = 𝑆0𝑒 𝜈𝑡+𝜎𝐵𝑡 Hypothesis construction • Supposed that the daily expected return of a certain stock is

., 2009). Their evidence indicates that there are valuation premiums for firms surpassing three benchmarks. Several studies suggest that incremental positive effects on prices or returns, also known as

international debt collector committee, illegally purchased 5,000,000 shares of PLE through others? accounts in such a way as to take advantage of other persons by using positive material non-public information

shares of BGH through the trading account of Miss Viporn Jitsomwang and Mrs. Narumon Chainaknan in such a way as to take advantage of other persons by using positive material non- public information

account of another person which he was authorized to trade in such a way as to take advantage of other persons by using positive material non- public information concerning RPC interim dividend at the

of RPC through the trading account of another person which he was beneficial owner in such a way as to take advantage of other persons by using positive material non- public information concerning

Public Company Limited (MAKRO) through his account in such a way as to take advantage of other persons by using positive material non- public information concerning negotiation which CPALL negotiated with