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Do specialization benefits outweigh concentration risks in credit portfolios of German banks?

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  • Böve, Rolf
  • Düllmann, Klaus
  • Pfingsten, Andreas

Abstract

Lending specialization on certain industry sectors can have opposing effects on monitoring (including screening) abilities and on the sectoral concentration risk of a credit portfolio. In this paper, we examine in the first part if monitoring abilities of German cooperative banks and savings banks increase with their specialization on certain industry sectors. We observe that sectoral specialization generally entails better monitoring quality, particularly in the case of the cooperative banks. In the second part we measure the overall effect of better monitoring and the associated higher sectoral credit concentrations on the credit risk of the portfolio. Our empirical results suggest that specialization benefits overcompensate the impact of higher credit concentrations in the case of the cooperative banks. For savings banks, the results on the net effect depend on how specialization is measured. If specialization is gauged by Hirschman Herfindahl indices, the net effect is an increase of portfolio risk due to the higher sectoral concentration. If specialization is instead measured by distance measures, portfolio risk decreases as the impact of better monitoring abilities prevails.

Suggested Citation

  • 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.
  • Handle: RePEc:zbw:bubdp2:201010
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    Cited by:

    1. Jahn, Nadya & Memmel, Christoph & Pfingsten, Andreas, 2013. "Banks' concentration versus diversification in the loan portfolio: New evidence from Germany," Discussion Papers 53/2013, Deutsche Bundesbank.
    2. Bülbül, Dilek, 2013. "Determinants of trust in banking networks," Journal of Economic Behavior & Organization, Elsevier, vol. 85(C), pages 236-248.
    3. Nadya Jahn & Christoph Memmel & Andreas Pfingsten, 2016. "Banks’ Specialization versus Diversification in the Loan Portfolio," Schmalenbach Business Review, Springer;Schmalenbach-Gesellschaft, vol. 17(1), pages 25-48, April.
    4. Line Drapeau & Claudia Champagne, 2015. "Do Syndicated Loans Influence Systemic Risk? An Empirical Analysis of the Canadian Syndicated Loan Market," Review of Economics & Finance, Better Advances Press, Canada, vol. 5, pages 22-41, November.
    5. Beck, Thorsten & De Jonghe, Olivier & Mulier, Klaas, 2017. "Bank sectoral concentration and (systemic) risk: Evidence from a worldwide sample of banks," CEPR Discussion Papers 12009, C.E.P.R. Discussion Papers.

    More about this item

    Keywords

    bank lending; loan portfolio; diversification; expected loss; savings banks; cooperative banks; concentration; economic capital; credit risk;

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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