Investigating exchange rate fluctuations on the performance of companies admitted to the Tehran Stock Exchange

The main purpose of this research is to examine the exchange rate fluctuation on the performance of companies listed in the Tehran Stock Exchange. In the inferential analysis to test the research hypotheses about the econometric model, a combined or combined regression model was used, taking into account all the assumptions of classical regression. This data is a combination of data related to different companies in different years and was considered as company-year observations. Fisher's statistic was used for the overall evaluation of the model. The data collected using Excel 2010 software, after the necessary corrections and classification based on the investigated variables, were entered into Eviews 8 software, based on which the results were written and a model was designed from the output of this software. After the final analysis, all research hypotheses were confirmed using the results obtained from the relevant software. The results of the research showed that currency reflects the mutual reaction of supply and demand in a market where many buyers and sellers are present despite the relatively free flow of information. The turbulence of the currency market or political instability increases, which shows the desire of companies to choose this type of asset in their asset portfolio to maintain its value.