Investigating the effect of a relationship between a share and the market on the stock output of private companies listed on the Tehran Stock Exchange Organization

At a time when the stock market and OTC market has become one of the most important investment centers for individuals and most people are looking to invest in the stock market, researchers and scholars should conduct new research in this field so that investors with knowledge and  Take more confidence in investing, and also companies, by studying the practical results of this research, are more willing to supplement the shortcomings and offer their company stock in the stock market. This study examines whether the relationship between a share and the market (beta coefficient)  And is there an impact on stock output or not, and also does accounting beta have more power to predict stock returns in Iran than market beta? In order to test the hypothesis of research the Pearson Correlation Coefficient have been used. Conclusions show that the Return of Companies’ stock is influenced by Accounting Beta and Market Beta Also Accounting Beta have increasing informational Content in Comparison with market Beta in Predicting stock Return.