Portfolio Selection with Intuinıstionic Fuzyy TOPSİS Method: An Application at Borsa Istanbul

In this study, the best performing companies of BIST were determined and the performances of different\rportfolios which consists of the stocks of these companies were analyzed. The Intuinistionic Fuzzy TOPSIS\rmethod was used in the selection of stocks to be included in the portfolios. In the study, 15 different portfolios\rwere created over 5 years and the performances of these portfolios were compared with each other and with the\rBIST 100 index. İt has been determined that portfolios which are created with stocks selected with the\rIntuinistionic Fuzzy TOPSIS method perform much better than the BIST 100 index in both rising and falling\rmarkets. As a result of the study, it was concluded that the Intuinistionic Fuzzy TOPSIS method is useful for\rdetermining the stocks to be included in the portfolio and it would be beneficial for investors to use this method\rwhen creating a portfolio.