نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
The main objective of the present study is to investigate the comparative power of dynamic and static models based on value at risk (VaR) in selecting an optimal efficient portfolio based on adverse risk in the stock exchange. The study is a descriptive, applied, and post-event research. The statistical population available for this study includes all companies listed on the Tehran Stock Exchange between 1395 and 1400. Therefore, the research sample or sampling method is census and the entire statistical population is considered as a sample. The index of the top 50 companies is also used to strengthen the model. To estimate the value at risk of the case, data from the total price index and the index of the top 50 active companies between 1395 and 1400 are used. In this study, first, for the selected companies, the adverse risk was calculated using the value at risk VaR in the form of static and dynamic methods. In data analysis, price data under two total indices and the index of top 50 companies were taken from Tehran Stock Exchange Technology Management Company in an adjusted form and logarithm was used to convert price to return and Matlab, OxMetrixs and R software were used to analyze the data. According to the results obtained from the present study, it can be said that the adverse risk criterion is more reliable and valuable than the mean variance criterion in assessing the risk of portfolio optimization.