Dynamic graph neural networks for enhanced volatility prediction in financial markets

• URL: http://arxiv.org/abs/2410.16858v1
• Date: Tue, 22 Oct 2024 09:52:15 GMT
• Title: Dynamic graph neural networks for enhanced volatility prediction in financial markets
• Authors: Pulikandala Nithish Kumar, Nneka Umeorah, Alex Alochukwu,
• Abstract summary: This paper proposes a novel approach using Graph Neural Networks (GNNs) to represent global financial markets as dynamic graphs. By utilizing correlation-based and volatility indices, the Temporal GAT constructs directed graphs that enhance the accuracy of volatility predictions.
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• Abstract: Volatility forecasting is essential for risk management and decision-making in financial markets. Traditional models like Generalized Autoregressive Conditional Heteroskedasticity (GARCH) effectively capture volatility clustering but often fail to model complex, non-linear interdependencies between multiple indices. This paper proposes a novel approach using Graph Neural Networks (GNNs) to represent global financial markets as dynamic graphs. The Temporal Graph Attention Network (Temporal GAT) combines Graph Convolutional Networks (GCNs) and Graph Attention Networks (GATs) to capture the temporal and structural dynamics of volatility spillovers. By utilizing correlation-based and volatility spillover indices, the Temporal GAT constructs directed graphs that enhance the accuracy of volatility predictions. Empirical results from a 15-year study of eight major global indices show that the Temporal GAT outperforms traditional GARCH models and other machine learning methods, particularly in short- to mid-term forecasts. The sensitivity and scenario-based analysis over a range of parameters and hyperparameters further demonstrate the significance of the proposed technique. Hence, this work highlights the potential of GNNs in modeling complex market behaviors, providing valuable insights for financial analysts and investors.

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