Effect of Accepting by Tehran Stock Exchange on Disclosure Rate

Abstract

Economic development is based on availability of financial resources. Different groups' rely on information system in order to make their decisions about investment. Information disclosure have basic role in corrective & informative decisions of different groups, particularly investors. Moreover, information is important for investors & others, it must be disclosed properly, sufficiently and completely in order to be useful in their decisions .We want to know rate of sufficient disclosure before and after acceptance in Tehran Stock Exchange. Checklist of disclosure is set by instruction review of Tehran stock Exchange. Number of disclosure cases in this checklist is 50 that derive from instruction of Tehran Stock Exchange. It uses normality test Kolomugorof Simonov to review level of information disclosure and it uses t-test for comparison rate of disclosure before and after company acceptance in Tehran Stock Exchange and it uses p-test to reject or accept assumption. With regard to above cases, the following results obtain: There is meaningful relationship between rate of sufficient disclosure in financial statements in companies before acceptance in Tehran Stock exchange and after it. And level of accepted company's disclosure in Tehran Stock exchange have improving trend, and rate of sufficient disclosure in financial statements in companies is more than unaccepted companies in Tehran stock exchange.