چكيده به لاتين
This research tries to optimize the investment portfolio by creating a new model, taking into account the utility of the investor. Each investor has several mental accounts about his assets, including that he divides his entire assets into sections and for Each part has a specific plan for the future or the money from the investment is obtained in different ways. In this research, we have paid attention to the investor's mental accounts and considered them in the resulting model. On the other hand, the definition of good investment differs from the investor's point of view according to his behavioral characteristics and goals for the future. In this model, the utility of the investor is also considered, which indicates the level of investor satisfaction. On the other hand, this study, considering the transaction costs, has created a multi-period model, which in this way leads to a reduction in Excess purchases and sales. In this case, it is assumed that the person has a capital portfolio in the current period that he wants to change and optimize for the next period. Finally, we test the operation of the model with hypothetical examples, with two different distribution functions and also in cases The results show that the model works perfectly logically in both cases and provides the correct answers. In this regard, the objectives of each sub-portfolio, which is applied in the form of restrictions, are fully considered in the answers. The model of this research is a single-objective and nonlinear.
