Shahid Beheshti University Financial Management Perspective 2645-4637 10 31 2020 10 22 Modeling of Optimal Stock portfolio Optimization Based on Risk Assessment and Behavioral Financial Approach (Mental Accounting) in Tehran Stock Exchange Modeling of Optimal Stock portfolio Optimization Based on Risk Assessment and Behavioral Financial Approach (Mental Accounting) in Tehran Stock Exchange 75 101 96067 10.52547/jfmp.10.31.75 FA Seyyedeh Farrokh Nikoo Ph.D. Candidate in Financial Management, Islamic Azad Uinversity, Qazvin Branch, Qazvin, Iran. Shahabeddin Shams Ph.D. in Financial Management, Lecturer at Islamic Azad Uinversity, Qazvin Branch, Qazvin, Iran. Mohsen Seyghali Ph.D. in Financial Management, Lecturer at Islamic Azad Uinversity, Qazvin Branch, Qazvin, Iran. Journal Article 2020 09 09 This essay concentrates on modelling of Optimal Stock portfolio selection based on Risk Assessment and Behavioral Financial Approach Mental Accounting and 28 expert’s opinion. In this approach developing the model approved by the opinion of academic and practical experts using quantitative and qualitative methods.  Using quarterly return data of industrial indices for ten year in form of eight training and tow test years indicates that the performance of DMSS and MVO based portfolios is equal however by regarding the value at risk and liquidity constrains in modeling, DMSS based portfolios perform higher than MVO portfolios. This essay concentrates on modelling of Optimal Stock portfolio selection based on Risk Assessment and Behavioral Financial Approach Mental Accounting and 28 expert’s opinion. In this approach developing the model approved by the opinion of academic and practical experts using quantitative and qualitative methods.  Using quarterly return data of industrial indices for ten year in form of eight training and tow test years indicates that the performance of DMSS and MVO based portfolios is equal however by regarding the value at risk and liquidity constrains in modeling, DMSS based portfolios perform higher than MVO portfolios. https://jfmp.sbu.ac.ir/article_96067_ca8f6ca957ce23e4fe6464f6047c9d5a.pdf