Hierarchical contagions in the interdependent financial network

William Barnett, Xue Wang, Hai-Chuan Xu and Wei-Xing Zhou

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Abstract: We derive the default cascade model and the fire-sale spillover model in a unified interdependent framework. The interactions among banks include not only direct cross-holding, but also indirect dependency by holding mutual assets outside the banking system. Using data extracted from the European Banking Authority, we present the interdependency network composed of 48 banks and 21 asset classes. For the robustness, we employ three methods, called $\textit{Anan}$, $\textit{Ha\l{}a}$ and $\textit{Maxe}$, to reconstruct the asset/liability cross-holding network. Then we combine the external portfolio holdings of each bank to compute the interdependency matrix. The interdependency network is much denser than the direct cross-holding network, showing the complex latent interaction among banks. Finally, we perform macroprudential stress tests for the European banking system, using the adverse scenario in EBA stress test as the initial shock. For different reconstructed networks, we illustrate the hierarchical cascades and show that the failure hierarchies are roughly the same except for a few banks, reflecting the overlapping portfolio holding accounts for the majority of defaults. We also calculate systemic vulnerability and individual vulnerability, which provide important information for supervision and relevant management actions.

Date: 2021-06, Revised 2022-06
New Economics Papers: this item is included in nep-ban, nep-cba, nep-fdg and nep-net
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

Published in Journal of Financial Stability, 2022, 61: 101037

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Journal Article: Hierarchical contagions in the interdependent financial network (2022)
Working Paper: Hierarchical contagions in the interdependent financial network (2021)
Working Paper: Hierarchical contagions in the interdependent financial network (2021)
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