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Efficient construction of threshold networks of stock markets

Xin-Jian Xu, Kuo Wang, Liucun Zhu and Li-Jie Zhang

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Abstract: Although the threshold network is one of the most used tools to characterize the underlying structure of a stock market, the identification of the optimal threshold to construct a reliable stock network remains challenging. In this paper, the concept of dynamic consistence between the threshold network and the stock market is proposed. The optimal threshold is estimated by maximizing the consistence function. The application of this procedure to stocks belonging to Standard \& Pool's 500 Index from January 2006 to December 2011 yields the threshold value 0.28. In analyzing topological characteristics of the generated network, three globally financial crises can be distinguished well from the evolutionary perspective.

Date: 2018-03, Revised 2018-08
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Published in Physica A 509 (2018) 1080-1086

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