Hierarchical contagions in the interdependent financial network

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

Journal of Financial Stability, 2022, vol. 61, issue C

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 Anan, Hała and 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.

Keywords: Systemic risk; Financial network; Interdependent network; Contagions; Stress test (search for similar items in EconPapers)
JEL-codes: D85 G01 G21 G32 G33 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Related works:
Working Paper: 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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Persistent link: https://EconPapers.repec.org/RePEc:eee:finsta:v:61:y:2022:i:c:s1572308922000596

DOI: 10.1016/j.jfs.2022.101037

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