Abstract

The purpose of this study is determining the effect of intellectual capital information voluntary disclosure on information asymmetry of the Listed Companies in Tehran stock exchange. According to prior researches (Li & Haniffa (2007) and Ibikonel et al (2013) and Zuaini & Abood Mohammad (2013) ), a dummy variable define to expose the intellectual capital information voluntary disclosure and by investing the report board directors, determine a score for each company to expose this and information asymmetry measure based on Stoll (1989). In this study 137 companies were selected by systematic elimination for a period of 5 year (2010-2014). The results of the study hypothesis suggest that by increasing the intellectual capital information voluntary disclosure, reducing the information asymmetry.In other words ntellectual capital information voluntary disclosure in the period under review, reducing the informationasymmetryof the Listed Companies in Tehran stock exchange.. Results are consistent with findings Zuaini & Abood Mohammad (2013).