Abstract:

The aim of this study is to investigate the availability of foolish models in the portfolio preference stage for financial investors. For this purpose, in the creation of portfolios that investors will use to convert financial resources in investments, profiting from past price changes, will be attempted to obtain high returns through the Bully Verdegay method.  The stock exchange in Istanbul, using 10 index data, has been attempted to give an optimal portfolio decision. Using the past values of the indicators, the average return and maximum return marginal values are determined. While an investment decision is made by investors, Verdegay's foolish model, one of the optimization techniques used for portfolio selection in literature, makes the optimum weighting process according to the target function from the mixed strategies. After the weighting process made, the success of the result to be achieved in the last part of the study was discussed through backward tests.

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Abstract:

The purpose of this study is to investigate the availability of fuzzy models in the portfolio preference phase for financial investors. For this purpose, in establishing the portfolios that investors will use to invest in the financial resources of the investors, they will try to obtain high returns through the Fuzzy Verdegay method, using past price changes. An optimal portfolio decision was made by using 10 index data traded in Borsa Istanbul. The average return and maximum return thresholds are determined using the historical values of the Indices. When an investment decision is taken by investors, the Verdegay fuzzy model, which is one of the optimization techniques used for portfolio selection in the literature, performs optimal weighting according to the objective function among the mixed strategies. After the weighting process, the success of the result to be reached in the last part of the study was discussed through retrospective tests.