Predicting the Brazilian stock market through neural networks and adaptive exponential smoothing methods

Authors:
E. L. de Faria;Marcelo P. Albuquerque;J. L. Gonzalez;J. T. P. Cavalcante;Marcio P. Albuquerque
Affiliations:
Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, URCA, Rio de Janeiro 22290-180, Brazil;Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, URCA, Rio de Janeiro 22290-180, Brazil;Pontifícia Universidade Católica, Rua Marques de São Vicente 225, Gávea, Rio de Janeiro 22453-900, Brazil;Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, URCA, Rio de Janeiro 22290-180, Brazil;Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, URCA, Rio de Janeiro 22290-180, Brazil
Venue:
Expert Systems with Applications: An International Journal
Year:
2009

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Abstract

The study of financial markets has been addressed in many works during the last years. Different methods have been used in order to capture the non-linear behavior which is characteristic of these complex systems. The development of profitable strategies has been associated with the predictive character of the market movement, and special attention has been devoted to forecast the trends of financial markets. This work performs a predictive study of the principal index of the Brazilian stock market through artificial neural networks and the adaptive exponential smoothing method, respectively. The objective is to compare the forecasting performance of both methods on this market index, and in particular, to evaluate the accuracy of both methods to predict the sign of the market returns. Also the influence on the results of some parameters associated to both methods is studied. Our results show that both methods produce similar results regarding the prediction of the index returns. On the contrary, the neural networks outperform the adaptive exponential smoothing method in the forecasting of the market movement, with relative hit rates similar to the ones found in other developed markets.