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Banks' management of the net interest margin: Evidence from Germany

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  • Memmel, Christoph
  • Schertler, Andrea

Abstract

We decompose the change in banks' net interest margin into a change in market-wide bank rates and a change in the balance-sheet composition. Our empirical findings from a detailed data set on German banks' balance-sheet positions, broken down into different maturities, creditors and borrowers and degrees of liquidity are as follows: (i) Changes in bank rates have a much greater impact on and explain more of the variation in net interest margins than do changes in balance-sheet compositions. (ii) Changes in bank rates and changes in balance-sheet compositions affect the change in the net interest margin less strongly for derivative users than for non-users. On average, banks employ interest rate derivatives to reduce on-balance risk. (iii) When risk-taking becomes more lucrative, banks tend to increase their on-balance exposure. This effect is more pronounced for derivative users than for non-users.

Suggested Citation

  • Memmel, Christoph & Schertler, Andrea, 2011. "Banks' management of the net interest margin: Evidence from Germany," Discussion Paper Series 2: Banking and Financial Studies 2011,13, Deutsche Bundesbank.
  • Handle: RePEc:zbw:bubdp2:201113
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    References listed on IDEAS

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    Cited by:

    1. Ruprecht, Benedikt & Entrop, Oliver & Kick, Thomas & Wilkens, Marco, 2013. "Market timing, maturity mismatch, and risk management: Evidence from the banking industry," Discussion Papers 56/2013, Deutsche Bundesbank.
    2. Holton, Sarah & Kelly, Jane & Lydon, Reamonn & Monks, Allen & O'Donnell, Nuala, 2013. "The Impact of the Financial Crisis on Banks' Net Interest Margins," Economic Letters 01/EL/13, Central Bank of Ireland.
    3. Ioan TRENCA & Mihail-Ioan COCIUBA, 2014. "How does assets-liabilities management affects the profitability of banks?," The Journal of Accounting and Management, Danubius University of Galati, issue 3, pages 47-50, December.
    4. Tsai, Jeng-Yan, 2013. "Bank interest margin management based on a path-dependent Cobb–Douglas utility framework," Economic Modelling, Elsevier, vol. 35(C), pages 751-762.
    5. Ulrich Gunter & Gerald Krenn & Michael Sigmund, 2013. "Macroeconomic, Market and Bank-Specific Determinants of the Net Interest Margin in Austria," Financial Stability Report, Oesterreichische Nationalbank (Austrian Central Bank), issue 25, pages 87-101.

    More about this item

    Keywords

    net interest margin; banking; balance-sheet composition;

    JEL classification:

    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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