Thesis:

Moderating Role of Chief Executive Officer Optimism on The Relationship Between Earnings Quality and Investment Efficiency

One of the most important issues in financial and investment decisions is the investment efficiency of companies. Therefore, this issue can be attractive for investors in their investment. Various factors affect the efficiency of investment. Among these factors, we can mention the quality of profit. The main goal of this research is to investigate the relationship between the moderating effect of managers' overconfidence on the relationship between profit quality and investment efficiency in companies listed on the Tehran Stock Exchange. In order to examine this issue, research hypotheses were tested based on a statistical sample consisting of 105 companies during the years 2017 to 2018 and using multivariable The research findings showed that there is a positive and significant relationship between profit quality and investment efficiency. Also, managers' overconfidence weakens the relationship between profit quality and investment efficiency. This shows that overconfidence of managers reduces the relationship between profit quality and investment efficiency. regression models

Keywords: Managers' overconfidence, profit quality, investment efficiency.