listed companies are required not to give any sign in the disclosures. Such disclosures include: (a) releasing any news to the public using improper language; (b) releasing news to the public which is not reflective actual developments in the company’s activities; (c) reporting or estimating in an exaggerated manner; (d) disclosing data in an exaggerated manner or by using language that may make investors misunderstand, causing stock price fluctuations without appropriate reason. Lastly, listed companies are required not to trade directors’ stock by using internal information “Insider”. According to insider, top management or directors are not able to sell or purchase any stock based on their own important information which is not disclosed to the public.