The returns of the companies' shares have always been of interest to the stakeholders, and the profitability of the companies in the future and the ability to predict it can be a very useful help to their decisions in buying and selling shares and giving credit to the companies, as well as a warning to the managers to improve their performance, etc. Regarding the importance of this issue; the present study examines the relationship between momentum strategy and economic growth with abnormal returns in companies listed on the Tehran Stock Exchange. For this purpose; The information of 108 companies admitted to the Tehran Stock Exchange for a five-year period (from the beginning of 2018 to the end of 2022), was extracted, the research variables were calculated, and the necessary statistical tests were performed. The current research method is descriptive-correlational and its design is experimental and using the post-event approach, in order to test the research hypotheses, multivariable linear regression was used, which was investigated and tested using statistical and econometric methods. Hypotheses have been discussed. Research findings; It indicated that there is a negative and significant relationship between momentum strategy and abnormal returns, and there is a negative and significant relationship between economic growth and abnormal returns.