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Quantifying the components of the banks’ net interest margin

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  • Ramona Busch

    (Deutsche Bundesbank)

  • Christoph Memmel

    (Deutsche Bundesbank)

Abstract

Using unique data sets on German banks, we decompose their net interest margin and quantify the different components by estimating the costs of the various functions they perform. We investigate three major functions: liquidity and payment management for customers, bearing credit risk, and term transformation. For 2013, the costs of liquidity and payment management correspond, in the median, to 47% of the net interest margin, with bearing of credit risk and earnings from term transformation accounting for 12 and 37%, respectively.

Suggested Citation

  • Ramona Busch & Christoph Memmel, 2016. "Quantifying the components of the banks’ net interest margin," Financial Markets and Portfolio Management, Springer;Swiss Society for Financial Market Research, vol. 30(4), pages 371-396, November.
    • Handle: RePEc:kap:fmktpm:v:30:y:2016:i:4:d:10.1007_s11408-016-0279-3
    DOI: 10.1007/s11408-016-0279-3
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    Cited by:

    1. Christoph Memmel, 2018. "Why Do Banks Bear Interest Rate Risk?," Schmalenbach Business Review, Springer;Schmalenbach-Gesellschaft, vol. 70(3), pages 231-253, July.
    2. Dräger Vanessa & Heckmann-Draisbach Lotta & Memmel Christoph, 2021. "Interest and credit risk management in German banks: Evidence from a quantitative survey," German Economic Review, De Gruyter, vol. 22(1), pages 63-95, February.
    3. Busch, Ramona & Drescher, Christian & Memmel, Christoph, 2017. "Bank stress testing under different balance sheet assumptions," Discussion Papers 07/2017, Deutsche Bundesbank.
    4. Raymond F. D. D. Chaudron & Leo Haan & Marco Hoeberichts, 2023. "Banks’ Net Interest Income from Maturity Transformation and Other Interest Income: Communicating Vessels?," Journal of Financial Services Research, Springer;Western Finance Association, vol. 63(1), pages 35-62, February.
    5. Andreas Dombret & Yalin Gündüz & Jörg Rocholl, 2019. "Will German Banks Earn Their Cost Of Capital?," Contemporary Economic Policy, Western Economic Association International, vol. 37(1), pages 156-169, January.
    6. Memmel, Christoph & Heckmann-Draisbach, Lotta, 2023. "Banks' net interest margin and changes in the term structure," Discussion Papers 11/2023, Deutsche Bundesbank.

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    More about this item

    Keywords

    Net interest margin; Credit risk; Term transformation; Liquidity and payment management;
    All these keywords.

    JEL classification:

    • G - Financial Economics

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