Pooya Sabetfar - Assistant Professor, Department of Economic and Management, Qazvin Islamic Azad University, Qazvin, Iran
Pooya Sabetfar - Master of financial management, Department of Management, Qazvin Islamic Azad University, Qazvin, Iran

In the present study, we tried to investigate the relationship between the investment effect and stock returns in Tehran Stock Exchange. The index information of ۱۷۴ companies was collected during the period of ۲۰۰۹ to ۲۰۲۰. These ۱۷۴ companies were divided into four very large, large, small and very small portfolios. The results showed that there is no relationship between asset growth and stock returns in the Tehran Stock Exchange in very large and small companies. But in large and small companies, the main hypothesis of the research is confirmed. According to the results, there is no relationship between the investment rate on assets and stock returns in large, small and very small companies in Tehran Stock Exchange. Only in the very large companies the second hypothesis was approved. There is no relationship between investment growth and stock returns in the very large and small companies of the stock market. But in the case of large and small companies, there is a relationship between investment growth and stock returns.

stock return, asset growth, investment rate, Tehran stock exchange