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The relationship between net interest margin and noninterest income using a system estimation approach

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  • Nguyen, James

Abstract

This paper examines the determinants of bank net interest margin (NIM) and non-traditional banking activities (NII). A system estimation approach is employed to control for the simultaneity between NIM and NII for commercial banks in a group of 28 financially liberalized countries during the period between 1997 and 2004. We find a statistically significant negative relationship between NIM and NII for the period between 1997 and 2002. A generally positive but statistically insignificant association between NIM and NII is found for the subsequent period (2003–2004). Banks’ increasing involvement in non-traditional activities is negatively correlated with risk-adjusted profitability measures in the former subperiod, suggesting no obvious diversification benefits. However, the share of noninterest income is positively related to the return on assets (ROA) and the return on equity (ROE) for the latter subsample.

Suggested Citation

  • Nguyen, James, 2012. "The relationship between net interest margin and noninterest income using a system estimation approach," Journal of Banking & Finance, Elsevier, vol. 36(9), pages 2429-2437.
  • Handle: RePEc:eee:jbfina:v:36:y:2012:i:9:p:2429-2437
    DOI: 10.1016/j.jbankfin.2012.04.017
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    More about this item

    Keywords

    Bank margins; Market structure; Diversification; Noninterest income;
    All these keywords.

    JEL classification:

    • D40 - Microeconomics - - Market Structure, Pricing, and Design - - - General
    • G20 - Financial Economics - - Financial Institutions and Services - - - General
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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