Stock index forecasting based on a hybrid model |
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Authors: | Ju-Jie Wang Jian-Zhou Wang Zhe-George Zhang Shu-Po Guo |
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Institution: | 1. School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000, China;2. Department of Decision Sciences, Western Washington University, Bellingham, WA 98225, USA;3. Faculty of Business Administration, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6 |
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Abstract: | Forecasting the stock market price index is a challenging task. The exponential smoothing model (ESM), autoregressive integrated moving average model (ARIMA), and the back propagation neural network (BPNN) can be used to make forecasts based on time series. In this paper, a hybrid approach combining ESM, ARIMA, and BPNN is proposed to be the most advantageous of all three models. The weight of the proposed hybrid model (PHM) is determined by genetic algorithm (GA). The closing of the Shenzhen Integrated Index (SZII) and opening of the Dow Jones Industrial Average Index (DJIAI) are used as illustrative examples to evaluate the performances of the PHM. Numerical results show that the proposed model outperforms all traditional models, including ESM, ARIMA, BPNN, the equal weight hybrid model (EWH), and the random walk model (RWM). |
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