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In this paper, we analyze the relationship between the net interest margin (NIM) of US and European banks and market interest rates in a low interest rate environment. We contribute to the literature by examining a large sample of annual data on 1,155 banks from United States and EU member countries during the 2011-2016 period, which also covers periods of zero and negative rates in many of the observed countries. We test three hypotheses and come to three main conclusions. First, NIM is significantly influenced by the different institutional designs of bank-based or capital-basaed finanfical markets. Second, there are differences in NIM caused by bank size, although these are not fully captured by our methodology. Finally, we show significant differences by bank type: saving banks, real estate and mortgage banks, and cooperative banks report consistently lower NIMs than commercial banks and bank holdings. Contrary to other researches, we observe a negative relationship between NIM and the yield curve slope.
March 1998 Differences in interest margins reflect differences in bank characteristics, macroeconomic conditions, existing financial structure and taxation, regulation, and other institutional factors. Using bank data for 80 countries for 1988-95, Demirgüç-Kunt and Huizinga show that differences in interest margins and bank profitability reflect various determinants: * Bank characteristics. * Macroeconomic conditions. * Explicit and implicit bank taxes. * Regulation of deposit insurance. * General financial structure. * Several underlying legal and institutional indicators. Controlling for differences in bank activity, leverage, and the macroeconomic environment, they find (among other things) that: * Banks in countries with a more competitive banking sector-where banking assets constitute a larger share of GDP-have smaller margins and are less profitable. The bank concentration ratio also affects bank profitability; larger banks tend to have higher margins. * Well-capitalized banks have higher net interest margins and are more profitable. This is consistent with the fact that banks with higher capital ratios have a lower cost of funding because of lower prospective bankruptcy costs. * Differences in a bank's activity mix affect spread and profitability. Banks with relatively high noninterest-earning assets are less profitable. Also, banks that rely largely on deposits for their funding are less profitable, as deposits require more branching and other expenses. Similarly, variations in overhead and other operating costs are reflected in variations in bank interest margins, as banks pass their operating costs (including the corporate tax burden) on to their depositors and lenders. * In developing countries foreign banks have greater margins and profits than domestic banks. In industrial countries, the opposite is true. * Macroeconomic factors also explain variation in interest margins. Inflation is associated with higher realized interest margins and greater profitability. Inflation brings higher costs-more transactions and generally more extensive branch networks-and also more income from bank float. Bank income increases more with inflation than bank costs do. * There is evidence that the corporate tax burden is fully passed on to bank customers in poor and rich countries alike. * Legal and institutional differences matter. Indicators of better contract enforcement, efficiency in the legal system, and lack of corruption are associated with lower realized interest margins and lower profitability. This paper-a product of the Development Research Group-is part of a larger effort in the group to study bank efficiency.
Traditional theory suggests that more profitable banks should have lower risk-taking incentives. Then why did many profitable banks choose to invest in untested financial instruments before the crisis, realizing significant losses? We attempt to reconcile theory and evidence. In our setup, banks are endowed with a fixed core business. They take risk by levering up to engage in risky ‘side activities’(such as market-based investments) alongside the core business. A more profitable core business allows a bank to borrow more and take side risks on a larger scale, offsetting lower incentives to take risk of given size. Consequently, more profitable banks may have higher risk-taking incentives. The framework is consistent with cross-sectional patterns of bank risk-taking in the run up to the recent financial crisis.
In this paper, we analyse a relationship between net interest margin (NIM) of EU banks and market interest rates in a low-interest rate environment. We contribute to the literature when examining a large sample of annual data on 629 banks from EU member countries during the 2011-2016 period, which also covers the period of zero and negative rates. We test three hypotheses and come to the three main conclusions. First, NIM eroded during the whole observed period for all types of investigated banks. Second, a higher market concentration, proxied by the Herfindahl index, leads to higher NIM. Finally, we show a positive concave relationship of NIM with short-term interest rate observed in previous studies, which supports the suspected non-linearity in situation of zero lower bound of interest rates. Contrary to other researchers, we find a negative relationship between NIM and the yield curve slope.
Seminar paper from the year 2019 in the subject Business economics - Banking, Stock Exchanges, Insurance, Accounting, grade: 1,0, University of Frankfurt (Main), course: Inspecting the European Banking Sector, language: English, abstract: In the novel monetary environment of negative interest policy rates (NIPR) in the Euro area, it is questionable whether the existing findings on determinants of Net Interest Margins (NIM) still hold. This paper analyzes differences in the development of NIM across business models represented by a set of three indicators prior to and after the introduction of NIPR. The strategies are based on a binary categorization between high and low levels of the business indicators using a median, 67-33 and 80-20 percentile cut-off rule. I use a difference in differences (DiD) estimation approach, even though NIPR impact all banks’ NIM. Thus, the obtained estimates do not measure the impact of NIPR itself, but the DiD between strategies. I mostly find positive albeit insignificant effects on banks with low asset held for trading, high deposit and customer loan ratios. In contrast, the DiD coefficient for banks with high deposit-based financing using an 80-20 cut-off is -14 bp, which proves to be a highly significant and economically relevant. These findings support the notion that multiple channels are affecting banks’ NIM.
More than two years ago the European Central Bank (ECB) adopted a negative interest rate policy (NIRP) to achieve its price stability objective. Negative interest rates have so far supported easier financial conditions and contributed to a modest expansion in credit, demonstrating that the zero lower bound is less binding than previously thought. However, interest rate cuts also weigh on bank profitability. Substantial rate cuts may at some point outweigh the benefits from higher asset values and stronger aggregate demand. Further monetary accommodation may need to rely more on credit easing and an expansion of the ECB’s balance sheet rather than substantial additional reductions in the policy rate.
The aim of this paper is twofold: first, to study the determinants of banks’ net interest margin with a particular focus on the role of maturity transformation, using a new measure of maturity mismatch; second, to analyse the implications for banks from the relaxation of a binding prudential limit on maturity mismatch, in place in Italy until mid-2000s. The results show that maturity transformation is a relevant driver of the net interest margin, as higher maturity transformation is typically associated with higher net interest margin. However, ‘excessive’ maturity transformation— even without leading to systemic vulnerabilities— increases banks’ interest rate risk exposure and lowers their net interest margin.