The Effect of Financial Statement Comparability on Idiosyncratic Return Volatility by Emphasis on the Financial Reporting Quality

The present study aims to determine the effect of financial statement comparability on the idiosyncratic return volatility with emphasis on the quality of financial reporting. To test the research hypotheses, 80 companies were examined among the companies listed on the Tehran Stock Exchange during the years 1389 to 1397. In order to test the research hypotheses, a multivariate regression model and combined data have been used. The results of the research indicate that financial statement comparability has a significant and negative effect on idiosyncratic return volatility. The research findings also showed that when the quality of financial reporting is poor, the effect of financial statement comparability on idiosyncratic return volatility is stronger. This study emphasizes the benefits of financial statement comparability. The financial statement comparability reduces the risk of uncertainty about the cash flows and firm future performance and causes idiosyncratic return volatility to reduce