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Banks' net interest margin and changes in the term structure

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  • Memmel, Christoph
  • Heckmann-Draisbach, Lotta

Abstract

Understanding the impact of changing interest rates onto banks' net interest margin is of central importance for various stakeholders. The primary focus lies often on changes in the interest level. However, changes in the steepness are a second driver which also significantly impacts banks' interest business. We model the impact of an interest rate shock on a bank's net interest margin, where this shock consists not only of a level shift, but also of a change in the steepness of the term structure. Our simplified model can replicate stylized features of different bank business models.The outcome of our parsimonious model for a bank's interest business is broadly in line with the results of a quantitative survey among German small and medium-sized banks.

Suggested Citation

  • Memmel, Christoph & Heckmann-Draisbach, Lotta, 2023. "Banks' net interest margin and changes in the term structure," Discussion Papers 11/2023, Deutsche Bundesbank.
    • Handle: RePEc:zbw:bubdps:112023
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    References listed on IDEAS

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    More about this item

    Keywords

    Banks' net interest margin; Term Structure of Interest Rates;

    JEL classification:

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

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