Document Type : Original Article
Authors
1
PhD. Student in Financial Engineering, Department of Financial Management, Yazd Branch, Islamic Azad University, Yazd, Iran
2
Assistant Prof. Department of Economic, Yazd Branch, Islamic Azad University, Yazd, Iran,
3
Assistant Prof. Department of Financial Management, Yazd Branch, Islamic Azad University, Yazd, Iran,
10.22034/jmaak.2025.24147
Abstract
The purpose of this research is to investigate the comparative power of dynamic and static models based on expected loss (es) in choosing the optimal efficient portfolio based on adverse risk in Tehran Stock Exchange. The current research is one of the descriptive, applied and post-event researches. In order to estimate the expected drop, the data of the total price index and the index of the top 50 companies active in the period from 2015 to 2022 are used. For the selected companies, the adverse risk was calculated using the expected drop of ES in the form of static and dynamic methods.For the selected companies, the adverse risk was calculated using the expected drop of ES in the form of static and dynamic methods. In the data analysis, the price data under two total indices and the index of the top 50 companies were taken from the Tehran Stock Exchange Technology Management Company in an adjusted form, and from the logarithm to convert the price into yield, and from Matlab, OxMetrixs and R software for analysis. Data analysis is used. Based on the results, in both models, companies whose expected churn test is approved have higher expected churn ratings compared to companies whose expected churn is rejected. In order to check the significance of these differences from the ratings and the total expected drop rate, the average comparison test was performed and it indicates the significance of the total ratings as well as the base volume for the dynamic model, in other words, the higher the rating, the more likely The expected drop is confirmed according to the dynamic models.
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