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

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Author Info

  • 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.

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Bibliographic Info

Paper provided by Bank of England in its series Bank of England working papers with number 398.

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Length: 40 pages
Date of creation: 29 Jul 2010
Date of revision:
Handle: RePEc:boe:boeewp:0398

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

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References

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  1. 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.
  2. Iori, G. & Masi, G. D. & Precup, O. V. & Gabbi, G. & Caldarelli, G., 2005. "A network analysis of the Italian oversight money market," Working Papers 05/05, Department of Economics, City University London.
  3. Marc Pr�pper & Iman van Lelyveld & Ronald Heijmans, 2008. "Towards a Network Description of Interbank Payment Flows," DNB Working Papers 177, Netherlands Central Bank, Research Department.
  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. 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.
  6. Becher, Christopher & Millard, Stephen & Soramäki, Kimmo, 2008. "The network topology of CHAPS Sterling," Bank of England working papers 355, Bank of England.
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Cited by:
  1. Jurgilas, Marius & Zikes, Filip, 2012. "Implicit intraday interest rate in the UK unsecured overnight money market," Bank of England working papers 447, Bank of England.
  2. Morten L. Bech & Carl T. Bergstrom & Rodney J. Garratt & Martin Rosvall, 2011. "Mapping change in the federal funds market," Staff Reports 507, Federal Reserve Bank of New York.
  3. Benos, Evangelos & Garratt, Rodney & zimmerman, Peter, 2012. "Bank behaviour and risks in CHAPS following the collapse of Lehman Brothers," Bank of England working papers 451, Bank of England.

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