Changes in the Value Relevance of Accounting Information Overtime among Listed Companies in Tehran Stock Exchange

The value relevance of accounting information is termed as "the beneficial financial statements" is defined as the effect of such information on the economic-related decisions of the users regarding the evaluation of the past and the present events as well as verification or rectification of the previous assessments. The higher the value relevance of accounting information, leads to the stronger and greater cohesion between financial statement items and firm stock-share prices or returns. The main objective of this research is study of the changes in the value relevance of accounting information among listed companies in Tehran Stock Exchange for the period of 2009 to 2015. In this research, 165 listed companies have been selected as sample and two hypotheses have been surveyed. Result of the study showed the significant changes in the value relevance of accounting information among listed companies over time. In addition, variables such as long-term debt to assets and tangible assets and percentage of state-owned shares, have positively and significantly impact on the value relevance of accounting information, whereas variables such as firm ‘size, firm’ grow and one-year cumulative stock market return have negatively and inversely impact on the value relevance of accounting information.