Stock Portfolio Optimization Using a Combined Approach of Relative Robust Risk Parity
Publish place: Iranian Journal of Finance، Vol: 5، Issue: 4
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJFIFSA-5-4_005
تاریخ نمایه سازی: 24 فروردین 1401
Abstract:
Risk parity is perceived as one of the stock portfolio selection models that have received a lot of attention since the US financial crisis in ۲۰۰۸. The philosophy of this model is to allocate the same amount of portfolio risk between the constituent assets. In the present study, the combined portfolio selection model of relative robust risk parity is introduced, which uses the worst-case scenario approach on the covariance matrix parameter appearing in the robust risk model in portfolio robustness. According to historical data, several scenarios are considered for the covariance matrix. The objective function value of the hybrid model for each portfolio (feasible point) is the worst result (with most volatility) among the set of scenarios. Finally, the model selects a portfolio for which the worst possible result has the least relative volatility. The research portfolio consists of ۸ industries from Tehran Stock Exchange in the period ۲۰۱۱ to ۲۰۲۰. This portfolio has a higher Sharpe ratio than conventional models of mean-variance and weight parity, and is more resilient to market declines than the two models and produces less loss. Therefore, risk-averse investors are advised to use this stock portfolio selection model as a cover to face severe market declines.
Keywords:
Authors
Sayed Mohammad Ebrahim Mirmohammadi
Ph.D. Candidate, Faculty of Financial Engeenering, Kashan Branch, Islamic Azad University, Kashan, Iran.
Mehdi Madanchi zaj
Assistant Prof., Department of Financial Management, Faculty of Management, E-Campus Branch, Islamic Azad University, Tehran, Iran.
Hossein Panahian
Associate Prof., Department of Accounting, Kashan Branch, Islamic Azad University, Kashan, Iran.
Hossein Jabbary
Assistance Prof., Department of Accounting, Kashan Branch, Islamic Azad University, Kashan, Iran.
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