Factors Affecting the Return of Stock Mutual Funds in Tehran Stock Exchange

Mutual investment funds, as one of the most important non-banking financial intermediaries, are responsible for the transfer of capital from resource holders (society members) to consumers (manufacturing and service companies and others). In Iran, for the first time in the securities market law approved in 2004, these funds were taken into consideration, and equity investment funds entered the capital market arena from the beginning of 2010.The current research was conducted with the aim of investigating the factors affecting the efficiency of mutual investment funds in Iran; In this research, the information of 30 mutual investment funds has been examined in a period of 96 months from March 2011 to March 2019. The statistical method used for data analysis is correlation and multivariate regression.The results obtained from the hypothesis test show that there is a positive and significant relationship between the number of investment units, fund life and market return. Also, there is no significant relationship between the ratio of trading activities and mutual investment fund returns. There is a negative and significant relationship between the amount of cash held and the returns of mutual funds.