The purpose of this study was to determine compliance with disclosure laws in Iran and IOSCO's disclosure provisions, and to investigate the extent to which disclosures reported by companies listed on the Tehran Stock Exchange. We also examine the effect of communicating new management reports to the general meeting on increasing disclosure rates for these companies. This study focused on two hypotheses: first, 117 cases of compulsory disclosure in accordance with the rules of the Tehran Stock Exchange with IIS regulations, and second, the performance of Iranian stock exchanges in disclosing 117 obligatory disclosures of the stock exchange Tehran for the years 2018 and 2019. Finally, a non-parametric binomial test was used to analyze how to reveal information in the old and new forms of the board's reports to the General Shareholders' Meeting, which has been communicated to the corporations since 2019. Data analysis for the first hypothesis revealed that the disclosure standards of the Tehran Stock Exchange and the AIS laws are incompatible, with only 44% of disclosure cases being consistent. Regarding the second hypothesis, companies generally comply with the mandatory disclosure requirements and analysis of the third hypothesis showed that the new form of the report of the board has had a significant impact on the level of disclosure of companies admitted to the Tehran Stock Exchange. The conclusions of this study are significant for Tehran Stock Exchange directors to try to comply more with the International Disclosure Regulations' disclosure regulations, and the results may vary over time and at the level of the industry surveyed.
Key words: Effectiveness, Adequacy, Disclosure Arrangements
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