Mahjoubeh PourEtemadi - Ph.D. Candidate in Accounting, Aliabad Katul Branch, Islamic Azad University, Aliabad Katul, Iran.
Jamadordi Gorganli Doji - Assistant Professor of Accounting, Aliabad Katul Branch, Islamic Azad University, Aliabad Katul, Iran.
Maryam Bokharaeian Khorasani - Assistant Professor of Accounting, Aliabad Katul Branch, Islamic Azad University, Aliabad Katul, Iran.
Parviz Saeidi - Associate Professor of Accounting, Aliabad Katul Branch, Islamic Azad University, Aliabad Katul, Iran.

The fact that the past feelings and behaviors of company managers affect investors, and assessing its impact on the capital market, paves the way for managers and investors to make opportunistic choices. The purpose of this study is to investigate the relationship between past earnings management and earning investor trust using financial information related to companies listed on the stock exchange during the period ۱۳۹۴ to ۱۳۹۹. For this purpose, multivariate linear regression methods based on panel data and fixed effects methods have been used. The results of this study show that companies 'unexpected earnings do not have a significant effect on earning investors' trust and the impact of the company's low earning management in the past has not affected this relationship. However, stock prices have reacted negatively and significantly to earnings, and companies' past low earnings management has moderated this effect. In other words, it can be said that earnings management in the past reduces the stock price response to earnings announcements.

Earning management, Unexpected earning, Earning Investor Trust, Investors' reaction