Modelo Multiobjetivo para Seleção de Portfólios com Restrição de Cardinalidade, Custo de Transação e Valor em Risco Condicional
DOI:
https://doi.org/10.5540/tema.2016.017.03.0353Keywords:
Multiobjective Optimization, Portfolio Selection, CVaR, Multiobjective Genetic Algorithms.Abstract
Este trabalho apresenta um modelo multiobjetivo para seleção de portfólios de ações do mercado financeiro, que leva em consideração a restrição de cardinalidade, os custos de transação e os limites de investimento para cada ativo e para grupos de ativos. As funções-objetivo consideram o valor em risco condicional (CVAR – Conditional Value-at-Risk) como medida de risco e o valor esperado dos retornos históricos ponderados pelas proporções de investimento, descontados os custos de transação. Para a otimização do modelo foi utilizado um algoritmo genético multiobjetivo. Resultados mostram a capacidade do algoritmo em encontrar várias soluções eficientes, bem como a capacidade do modelo em auxiliar a tomada de decisão na escolha de portfólios que apresentem uma boa relação entre risco e retorno, para uma dada cardinalidade.
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