Ehsan Ghadrdan - Faculty Member of Accounting Department, payame Noor University, I.R. of Iran
Mohammad Rashedi - Master of Accounting, accounting Department, payame Noor University, I.R. of Iran

Information asymmetry of market brings undesired outcomes such as little participation of investors, high trade costs, weak markets, and low trade profits. Regarding to the importance of information asymmetry concept, the goal of this research is study of relationship between Corporative ownership and information asymmetry in companies accepted in Tehran Stock Exchange. A sample of ۹۷ companies, members of Tehran Stock Exchange, was selected for a ۵ year period (۲۰۰۷-۲۰۱۱). Linear regression model with confidence level of ۹۵% and software Excel and SPSS were used to test the research assumption. The results show that there a reverse (negative) relationship between Corporative ownership level with information asymmetry.

Information Asymmetry, Corporative ownership, Ownership structure