Macroprudential Consolidation Policy in Interbank Networks

Edoardo Gaffeo and Massimo Molinari

No 2014/01, DEM Discussion Papers from Department of Economics and Management

Abstract: Can consolidation policy be made consistent with macro-prudential supervision? In this study, we seek to provide new insights on this key-question using a network approach. We study how the resilience of a banking network evolves as we shock an initially homogenous competitive market with a sequence of M&A activities that significantly alter the topology of the network. We study how different M&A treatments impact on the structural vulnerabilities that can propagate through the system and we show that the severity of contagion and default dynamics depends on the chosen treatment. The desirability of alternative competitive settings (such as hub-centered market or a more concentrated and yet symmetric market) are assessed against an homogenous benchmark case and we show that the choice depends crucially on the size of the interbank market and the level of bank capitalization. The existence of a large highly connected hub is beneficial in a capitalized network with a well-developed interbank market but it can significantly weaken the system resilience in a poorly capitalized market. Antitrust and competition authorities shall adopt a state-contingent approach to M&A activities according to the market conditions in which banks operate.

Keywords: Consolidation Policy; Macroprudential Regulation; Interbank Networks (search for similar items in EconPapers)
Date: 2014
New Economics Papers: this item is included in nep-ban, nep-cba, nep-com and nep-net
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Citations: View citations in EconPapers (5)

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Journal Article: Macroprudential consolidation policy in interbank networks (2016)
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