Forecasting exchange rates using genetic algorithms

Marcos Alvarez-Diaz and Alberto Alvarez

Applied Economics Letters, 2003, vol. 10, issue 6, 319-322

Abstract: A novel approach is employed to investigate the predictability of weekly data on the euro/dollar, British pound/dollar, Deutsche mark/dollar, Japanese yen/dollar, French franc/dollar and Canadian dollar/dollar exchange rates. A functional search procedure based on the Darwinian theories of natural evolution and survival, called genetic algorithms (hereinafter GA), was used to find an analytical function that best approximates the time variability of the studied exchange rates. In all cases, the mathematical models found by the GA predict slightly better than the random walk model. The models are heavily dominated by a linear relationship with the most recent past value, while contributions from nonlinear terms to the total forecasting performance are rather small. In consequence, the results agree with previous works establishing explicitly that nonlinear nature of exchange rates cannot be exploited to substantially improve forecasting.

Date: 2003
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DOI: 10.1080/13504850210158250

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