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Banks' concentration versus diversification in the loan portfolio: New evidence from Germany

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  • Jahn, Nadya
  • Memmel, Christoph
  • Pfingsten, Andreas

Abstract

Using a unique data set on German banks' sector specific loan exposures to the real economy and the corresponding write-offs and write-downs, we examine the impact of loan portfolio sector concentration on credit risk. By controlling for common risk factors, we separate the bank-specific selection and monitoring abilities from the composition of the loan portfolio. In our empirical study for the period 2003-2011, we find that (a) banks which are specialized in certain industries have, on average, lower loan losses, (b) the loss rate of a given industry in a bank's loan portfolio is lower if the bank has major exposures to this industry, and (c) the standard deviation of the loan losses is lower in the case of more focused banks. --

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Bibliographic Info

Paper provided by Deutsche Bundesbank, Research Centre in its series Discussion Papers with number 53/2013.

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Date of creation: 2013
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Handle: RePEc:zbw:bubdps:532013

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Keywords: loan portfolio; credit risk; loan losses; concentration;

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  1. Harry Markowitz, 1952. "Portfolio Selection," Journal of Finance, American Finance Association, American Finance Association, vol. 7(1), pages 77-91, 03.
  2. Mario Quagliariello, 2006. "BanksÂ’ Riskiness Over the Business Cicle: a Panel Analysis on Italian Intermediaries," Temi di discussione (Economic working papers), Bank of Italy, Economic Research and International Relations Area 599, Bank of Italy, Economic Research and International Relations Area.
  3. Tabak, Benjamin M. & Fazio, Dimas M. & Cajueiro, Daniel O., 2011. "The effects of loan portfolio concentration on Brazilian banks' return and risk," Journal of Banking & Finance, Elsevier, vol. 35(11), pages 3065-3076, November.
  4. Behr, Andreas & Kamp, Andreas & Memmel, Christoph & Pfingsten, Andreas, 2007. "Diversification and the banks' risk-return-characteristics: evidence from loan portfolios of German banks," Discussion Paper Series 2: Banking and Financial Studies 2007,05, Deutsche Bundesbank, Research Centre.
  5. Evelyn Hayden & Daniel Porath & Natalja Westernhagen, 2007. "Does Diversification Improve the Performance of German Banks? Evidence from Individual Bank Loan Portfolios," Journal of Financial Services Research, Springer, Springer, vol. 32(3), pages 123-140, December.
  6. Sharpe, Steven A, 1990. " Asymmetric Information, Bank Lending, and Implicit Contracts: A Stylized Model of Customer Relationships," Journal of Finance, American Finance Association, American Finance Association, vol. 45(4), pages 1069-87, September.
  7. Böve, Rolf & Düllmann, Klaus & Pfingsten, Andreas, 2010. "Do specialization benefits outweigh concentration risks in credit portfolios of German banks?," Discussion Paper Series 2: Banking and Financial Studies 2010,10, Deutsche Bundesbank, Research Centre.
  8. Rossi, Stefania P.S. & Schwaiger, Markus S. & Winkler, Gerhard, 2009. "How loan portfolio diversification affects risk, efficiency and capitalization: A managerial behavior model for Austrian banks," Journal of Banking & Finance, Elsevier, vol. 33(12), pages 2218-2226, December.
  9. von Westernhagen, Natalja & Porath, Daniel & Hayden, Evelyn, 2006. "Does diversification improve the performance of German banks? Evidence from individual bank loan portfolios," Discussion Paper Series 2: Banking and Financial Studies 2006,05, Deutsche Bundesbank, Research Centre.
  10. Mark Carey & Mitch Post & Steven A. Sharpe, 1996. "Does corporate lending by banks and finance companies differ? Evidence on specialization in private debt contracting," Finance and Economics Discussion Series, Board of Governors of the Federal Reserve System (U.S.) 96-25, Board of Governors of the Federal Reserve System (U.S.).
  11. Boot, Arnoud W. A., 2000. "Relationship Banking: What Do We Know?," Journal of Financial Intermediation, Elsevier, Elsevier, vol. 9(1), pages 7-25, January.
  12. Memmel, Christoph & Gündüz, Yalin & Raupach, Peter, 2012. "The common drivers of default risk," Discussion Papers 36/2012, Deutsche Bundesbank, Research Centre.
  13. Ricardo Bebczuk y Arturo Galindo & Arturo Galindo, 2005. "Financial Crisis and Sectoral Diversification of Argentine Banks, 1999-2004," Department of Economics, Working Papers 060, Departamento de Economía, Facultad de Ciencias Económicas, Universidad Nacional de La Plata.
  14. Thomas C. Wilson, 1998. "Portfolio credit risk," Economic Policy Review, Federal Reserve Bank of New York, Federal Reserve Bank of New York, issue Oct, pages 71-82.
  15. Crouhy, Michel & Galai, Dan & Mark, Robert, 2000. "A comparative analysis of current credit risk models," Journal of Banking & Finance, Elsevier, vol. 24(1-2), pages 59-117, January.
  16. Dennis, Steven & Nandy, Debarshi & Sharpe, Lan G., 2000. "The Determinants of Contract Terms in Bank Revolving Credit Agreements," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 35(01), pages 87-110, March.
  17. Kamp, Andreas & Pfingsten, Andreas & Porath, Daniel, 2005. "Do banks diversify loan portfolios? A tentative answer based on individual bank loan portfolios," Discussion Paper Series 2: Banking and Financial Studies 2005,03, Deutsche Bundesbank, Research Centre.
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