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How does bubble risk propagate among financial assets? A perspective from the BSADF-vine copula model

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  • Yao, Can-Zhong
  • Li, Min-Jian
  • Xu, Xin

Abstract

In this paper, the BSADF method is used to construct the bubble net value sequence of 11 mainstream financial assets, and the vine copula model is used to analyze the characteristics of the bubble-related structure. First, we use the BSADF method to measure the bubbles of various financial assets. The results show that since the outbreak of COVID-19, most types of assets have experienced a sharp bubble rise and their longest bubble period as central banks have implemented quantitative easing policies. Furthermore, this article reveals the path characteristics of bubble risk transmission in different assets using the vine copula model. The R vine copula is found to be best for analyzing the tail dependence structure. The S&P 500 and the international gold price occupy the hub position in the bubble dependence structure of various financial assets. The Shanghai Composite Index and the US Dollar Index can act as relays and accelerators in the transmission of bubble risk across the financial system. Finally, we explore the tail dependence structure between financial assets. The results indicate that gold can be a good hedge against the bubble risk of the Hang Seng Index and WTI crude oil futures. The COVID-19 pandemic and accommodative monetary policies by governments can create conditions for bubble risk to spread between assets such as Bitcoin and China’s 10-year Treasury bonds and between the US Dollar Index and the S&P 500.

Suggested Citation

  • Yao, Can-Zhong & Li, Min-Jian & Xu, Xin, 2023. "How does bubble risk propagate among financial assets? A perspective from the BSADF-vine copula model," International Review of Economics & Finance, Elsevier, vol. 88(C), pages 347-364.
    • Handle: RePEc:eee:reveco:v:88:y:2023:i:c:p:347-364
    DOI: 10.1016/j.iref.2023.06.027
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