Calibrating limits for large interbank exposures from a system-wide perspective

Enrique Bátiz-Zuk, Fabrizio López-Gallo, Serafín Martínez-Jaramillo and Juan Pablo Solórzano-Margain

Journal of Financial Stability, 2016, vol. 27, issue C, 198-216

Abstract: We examine the role of imposing tighter limits on interbank exposures in reducing contagion and aggregate losses. In our model contagion risk arises as a result of the individual idiosyncratic failure of each bank in the banking system. Following Guerrero-Gomez and Lopez-Gallo (2004), we use a sequential default algorithm that is useful for tracing the path of contagion from a trigger bank to other banks during several contagion rounds. We test different types of limits on inter-SIB (systematically important banks) exposures, SIB to non-SIB exposures, and non-SIB to all other banks; and we study three different assumptions about banks’ behavioural responses under a stricter regulatory lending regime. We also “stress test” all banks within the banking system and extend the analysis on the benefits of using tighter limits in a fragile banking system. Calibrating the model to Mexican banking sector data, this network model shows that tighter limits for inter-SIB exposures are a useful tool for reducing contagion risk. Moreover, we find that tighter limits may lead to an increase in contagion risk under specific allocation assumptions.

Keywords: Systemic risk; Financial contagion; Network models; Large exposures limit; Systemically important banks (SIBs) (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (14)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:finsta:v:27:y:2016:i:c:p:198-216

DOI: 10.1016/j.jfs.2015.04.007

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