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arXiv 2110.11751q-fin.CPcs.LGcs.SIq-fin.PM
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基于网络特征的金融市场结构预测

Forecasting Financial Market Structure from Network Features using Machine Learning

University of São Paulo(圣保罗大学);Federal Institute of South of Minas Gerais(南米纳斯吉拉斯联邦学院);University College London(伦敦大学学院);University of Porto(波尔图大学)

Douglas Castilho, Tharsis T. P. Souza, Soong Moon Kang, João Gama, André C. P. L. F. de Carvalho

摘要:

我们提出了一个模型,该模型使用机器学习从基于链接和节点的金融网络特征预测市场相关性结构。因此,市场结构被建模为一个动态的资产网络,通过量化全球主要市场指数的公司成分之间的资产价格回报的随时间变化的共同运动。我们使用三种不同的网络过滤方法来估计市场结构,即动态资产图(DAG),动态最小生成树(DMST)和动态阈值网络(DTN)提供实证证据。实验结果表明,该模型可以预测市场结构具有较高的预测性能与高达$40\%$改进的时不变的相关性为基础的基准。与传统的成对相关性度量相比,非成对相关性特征对所有研究的市场都很重要,特别是在股票市场结构的长期预测中。证据提供了股票成分的DAX30,EUROSTOXX50,FTSE100,恒生50,纳斯达克100和NIFTY50市场指数。研究结果可用于改进投资组合选择和风险管理方法,这些方法通常依赖于向后看的协方差矩阵来估计投资组合风险。

英文摘要:

We propose a model that forecasts market correlation structure from link- and node-based financial network features using machine learning. For such, market structure is modeled as a dynamic asset network by quantifying time-dependent co-movement of asset price returns across company constituents of major global market indices. We provide empirical evidence using three different network filtering methods to estimate market structure, namely Dynamic Asset Graph (DAG), Dynamic Minimal Spanning Tree (DMST) and Dynamic Threshold Networks (DTN). Experimental results show that the proposed model can forecast market structure with high predictive performance with up to $40\%$ improvement over a time-invariant correlation-based benchmark. Non-pair-wise correlation features showed to be important compared to traditionally used pair-wise correlation measures for all markets studied, particularly in the long-term forecasting of stock market structure. Evidence is provided for stock constituents of the DAX30, EUROSTOXX50, FTSE100, HANGSENG50, NASDAQ100 and NIFTY50 market indices. Findings can be useful to improve portfolio selection and risk management methods, which commonly rely on a backward-looking covariance matrix to estimate portfolio risk.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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