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Forecasting the Volatility of CSI 300 Index with a Hybrid Model of LSTM and Multiple GARCH Models

Author

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  • Bu Tian

    (Renmin University of China)

  • Tianyu Yan

    (Renmin University of China)

  • Hong Yin

    (Renmin University of China)

Abstract

Volatility is a key indicator of market risk in financial markets. This paper proposes a novel hybrid model that combines Long Short-Term Memory (LSTM) with multiple generalized autoregressive conditional heteroskedasticity (GARCH) models to predict stock price volatility. The GARCH models serve as feature extractors, while the LSTM model utilizes these features to forecast next-day volatility. To better capture the leverage effect, the model integrates one symmetric and three asymmetric GARCH models (GEJT-LSTM-1), yielding the best forecast accuracy under a fixed-parameter approach. The proposed hybrid model significantly outperforms existing approaches by leveraging deep learning with multiple asymmetric GARCH models, demonstrating superior predictive performance. Furthermore, the methodology provides a flexible framework that can be extended to other fields, contributing to advancements in volatility forecasting techniques.

Suggested Citation

  • Bu Tian & Tianyu Yan & Hong Yin, 2025. "Forecasting the Volatility of CSI 300 Index with a Hybrid Model of LSTM and Multiple GARCH Models," Computational Economics, Springer;Society for Computational Economics, vol. 66(3), pages 1969-1999, September.
    • Handle: RePEc:kap:compec:v:66:y:2025:i:3:d:10.1007_s10614-024-10785-0
    DOI: 10.1007/s10614-024-10785-0
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