A MORE EFFICIENT MATHEMATICAL APPROACH TO THE PORTFOLIO OPTIMIZATION PROBLEM APPLIED IN THE BRAZILIAN STOCK MARKET

Autores

  • Allan Jonathan da Silva Universidade Católica de Petrópolis

Resumo

This article’s objective is to solve a portfolio optimization problem. This portfolio, supposed to be maximized, contains all 67 stocks listed in the Ibovespa, the main index of the Brazilian stock market. The mathematical method presented derives from the Markowitz mean-variance efficient frontier, and was developed by Michael J. Best. This method diminishes the quantity and the complexity of data to be processed and the necessity for advanced computational resources, simply using the regular calculus and the matrix theory. This article proves that Markowitz mean-variance based on diversification, developed almost sixty years ago, still remains the most efficient method for investment decision and asset allocation. The portfolio was optimized for the first semester of 2011, and the goal was to find the global minimum variance portfolio. Results show that the optimized portfolio beat the market in mentioned period and overcame the results of the best domestic investment funds.  

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17-02-2014

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