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Determinants of net interest margin: the effect of capital requirements and deposit insurance scheme

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  • Paula Cruz-García
  • Juan Fernández de Guevara

Abstract

This paper analyzes the determinants of net interest margin with a focus on the impact of capital regulation and deposit insurance. We extend the Ho and Saunders (1981) family of models to explicitly include both capital requirement and the deposit insurance premium as determinants of net interest margin. The model predicts that the higher the capital requirements and deposit insurance premium, the higher banks’ interest rates will be. We test the theoretical model using panel data for OECD countries between 2000 and 2014. Our results support the positive relationship between both the capital requirement and the deposit insurance premium on interest margins. The most important determinants of the net interest margin are implicit payments, efficiency, average operating costs, the intensity of competition, the deposit insurance premium and capital stringency.

Suggested Citation

  • Paula Cruz-García & Juan Fernández de Guevara, 2020. "Determinants of net interest margin: the effect of capital requirements and deposit insurance scheme," The European Journal of Finance, Taylor & Francis Journals, vol. 26(11), pages 1102-1123, July.
    • Handle: RePEc:taf:eurjfi:v:26:y:2020:i:11:p:1102-1123
    DOI: 10.1080/1351847X.2019.1700149
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    Cited by:

    1. Valente, José & Augusto, Mário & Murteira, José, 2024. "Differentiated impact of spread determinants by personal loan category: Evidence from the Brazilian banking sector," International Review of Economics & Finance, Elsevier, vol. 89(PB), pages 299-315.
    2. Mudeer A. Khattak & Buerhan Saiti & Shabeer Khan, 2023. "Does market power explain margins in dual banking? Evidence from panel quantile regression," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 28(2), pages 1826-1844, April.
    3. Petr Hanzlík & Petr Teplý, 2022. "Key factors of the net interest margin of European and US banks in a low interest rate environment," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 27(3), pages 2795-2818, July.
    4. Nguyen, Thach V.H. & Nguyen, Thai Vu Hong, 2022. "How do banks price liquidity? The role of market power," Global Finance Journal, Elsevier, vol. 53(C).
    5. Konstantins Benkovskis & Olegs Tkacevs & Karlis Vilerts, 2021. "Interest Rate Spreads in the Baltics and the Rest of the Euro Area: Understanding the Factors behind the Differences," Discussion Papers 2021/02, Latvijas Banka.

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