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The sterling unsecured loan market during 2006-08: insights from network theory

Author

Listed:
  • Wetherilt, Anne

    () (Bank of England)

  • Zimmerman, Peter

    () (Bank of England)

  • Soramaki, Kimmo

    () (Helsinki University of Technology)

Abstract

We model the unsecured overnight market in the United Kingdom as a network of relationships and examine how the structure has changed over the recent period of crisis. Using established network techniques, we find strong evidence of the existence of a core of highly connected banks alongside a periphery. We find that membership of this core expanded during the crisis and suggest that this is due to a few intermediate banks becoming more connected. The widened reserve target bands may have also had an effect, by partially alleviating the need to manage reserve accounts close to a target and therefore allowing banks to exercise more discretion in forming relationships. However, there is an asymmetry between borrowers and lenders in the overnight market, with borrowers more reliant on the most established of the core banks during the crisis.

Suggested Citation

  • Wetherilt, Anne & Zimmerman, Peter & Soramaki, Kimmo, 2010. "The sterling unsecured loan market during 2006-08: insights from network theory," Bank of England working papers 398, Bank of England.
    • Handle: RePEc:boe:boeewp:0398
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    File URL: https://www.bankofengland.co.uk/-/media/boe/files/working-paper/2010/the-sterling-unsecured-loan-market-during-2006-08-insights-from-network.pdf
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    References listed on IDEAS

    as
    1. Marc Pröpper & Iman van Lelyveld & Ronald Heijmans, 2008. "Towards a Network Description of Interbank Payment Flows," DNB Working Papers 177, Netherlands Central Bank, Research Department.
    2. Soramäki, Kimmo & Bech, Morten L. & Arnold, Jeffrey & Glass, Robert J. & Beyeler, Walter E., 2007. "The topology of interbank payment flows," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 379(1), pages 317-333.
    3. Iori, Giulia & De Masi, Giulia & Precup, Ovidiu Vasile & Gabbi, Giampaolo & Caldarelli, Guido, 2008. "A network analysis of the Italian overnight money market," Journal of Economic Dynamics and Control, Elsevier, vol. 32(1), pages 259-278, January.
    4. Michael Boss & Helmut Elsinger & Martin Summer & Stefan Thurner, 2004. "Network topology of the interbank market," Quantitative Finance, Taylor & Francis Journals, vol. 4(6), pages 677-684.
    5. Becher, Christopher & Millard, Stephen & SoramÃÂäki, Kimmo, 2008. "The network topology of CHAPS Sterling," Bank of England working papers 355, Bank of England.
    6. Cocco, João F. & Gomes, Francisco J. & Martins, Nuno C., 2009. "Lending relationships in the interbank market," Journal of Financial Intermediation, Elsevier, vol. 18(1), pages 24-48, January.
    Full references (including those not matched with items on IDEAS)

    More about this item

    Keywords

    Network; topology; interbank; unsecured loan; systemic risk; financial stability.;

    JEL classification:

    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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