Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/246115 
Year of Publication: 
2020
Series/Report no.: 
Working Paper No. 15/2020
Publisher: 
Norges Bank, Oslo
Abstract: 
What is the impact of granular credit risk on banks and on the economy? We provide the first causal identification of single-name counterparty exposure risk in bank portfolios by applying a new empirical approach on an administrative matched bank-firm dataset from Norway. Exploiting the fat tail properties of the loan share distribution we use a Gabaix and Koijen (2020a,b) granular instrumental variable strategy to show that idiosyncratic borrower risk survives aggregation in banks portfolios. We also find that this granular credit risk spills over from affected banks to firms, decreases investment, and increases the probability of default of non-granular borrowers, thereby sizably affecting the macroeconomy.
Subjects: 
Granular credit risk
credit concentration
granular borrowers
large exposures regulation
granular instrumental variable
granular hypothesis
Persistent Identifier of the first edition: 
ISBN: 
978-82-8379-169-3
Creative Commons License: 
cc-by-nc-nd Logo
Document Type: 
Working Paper
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