Select Optimal Portfolio of Stock in Companies Listed at Tehran Stock Exchange

Portfolio is combination of assets by an investor for investment. Process of selecting optimal stock basket is one of issue, which is paid attention by scholars. Various criteria of this process have changed by the time and this condition is necessary as optimal for making decision. Several criteria are included in selecting stock basket and it is necessary to use optimal tools for making better decision. Aim of this research is creating intelligent model in order to select optimal stock basket throughout adjusted differential evolution algorithm. Thus, we investigated risk and returns of companies listed at Tehran stock exchange annually. Sample study of research includes 102 companies during 2009 and 2013. Results of research showed that selected model by considering interaction between risk and expected return leads to selected optimal stock basket.