INVESTIGATING THE EFFECT OF DISCLOSURE OF INFORMATION ON PROFITABILITY IN COMPANIES ACCEPTED IN TEHRAN STOCK EXCHANGE

This research investigates the effect of voluntary and mandatory information disclosure on profitability in listed companies in Tehran Stock Exchange. Mandatory and voluntary disclosure of information are independent variables in this study. The researchers have used the criterion prepared in accordance with legal requirements, the rules and regulations governing financial reporting (trade law, tax laws and collections of stock exchange laws), accounting standards and professionals in order to measure the level of mandatory disclosure. To measure the level of mandatory disclosure of information, the researchers have defined as a checklist and designed a comprehensive List of cases of voluntary disclosure of information that may be provided by users to management, and then, by studying the financial reports of companies, they have given the one and zero values for disclosure and non-disclosure respectively, and used multivariate regression for data analysis. Taking into account 10 financial years for each company, the researchers selected 40 companies as the sample. The total number of observations is 400, which is appropriate as compared with the other studies conducted in the area of voluntary disclosure of information. The results of this study indicate that the mandatory and voluntary disclosure of information has a significant positive impact on companies profitability.

کلیدواژه ها:

Disclosure ، Mandatory Disclosure ، Voluntary Disclosures ، Profitability