The Nexus between Macro-Prudential Banking Regulation, Interest Rate Spread and Monetary Policy in South Africa

  • Shayanewako Varaidzo Batsirai University of Fort Hare, South Africa
  • Asrat Tsegaye University of Fort Hare, South Africa
  • Yohane Khamfula University of Fort Hare, South Africa
Keywords: Macro-prudential banking regulation; Interest rate spread; Monetary policy; New Keynesian Dynamic Stochastic General Equilibrium Model; Financial stability.


This study is an empirical attempt to investigate the nexus between macro-prudential banking regulation, interest rate spread and monetary policy in South Africa. The effectiveness of monetary policy and alarmingly wide interest rate spread has been a contentious issue in the corridors of central banks across the globe in this lifetime. This has been largely because monetary policy alone proved to be less efficient in mitigating the effects of systemic risk, particularly during the 2007 financial crisis, necessitating the need for macro-prudential banking regulation. Time series dataset spanning from 1994Q1 to 2016Q4 is employed to carry out this study using the restricted Vector Autoregressive (VAR) model, that is, the Vector Error Correctional Model (VECM). The results show that there is no long-run causality running from trade openness, real exchange rate financial depth interest rate spread and credit growth to the repo rate in South Africa. A short run causality running from credit growth to the repo rate exists from the estimated model. In addition, the empirical results exhibited evidence that interest rate spread has a dampening effect on monetary policy but in the long-run this effect seems reversible in South Africa. Therefore, in order to ensure financial stability, care has to be taken by the South African Reserve Bank and government in choosing the best tool-kit of macro-prudential banking regulation as it can be used to disguise the symptoms of a lax monetary policy framework.


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Adrian, T. & Shin, H. S. (2012). Liquidity and leverage. New York: Princeton University.
Adrian, T., Fleming, M., Shachar, O. & Vogt, E. (2015). Has U.S corporate bond market hit with the crisis? European economics, 60-75.
Aikman, D., Kiley, M. T., Lee, S. J., Palumbo, M. G. & Warusawitharana, M. N. (2015). Mapping heat in the US financial system. Finance and economics discussion series (pp. 123-140). Washington DC: Federal Reserve System.
Angeloni, I., Faia, E. & Lo Duca, M. (2015). Monetary policy and risk-taking. Journal of economic dynamics and control, 285-307.
Aron, J. & Muellbauer, J. (2007). Review of monetary policy in South Africa since 1994. Journal of African economies, 705-744.
BASA. (2016). Contributions to a technical committee to review the spread between the repo rate and the prime rate. Cape town (pp. 87-94). Cape Town: Banking Association of South Africa.
Bebchuk, L. A. & Goldstein, I. (2011). Self-fulfilling credit market freezes. Review of financial studies, 3519-3555.
BIS. (2014, June 24). Emerging economies respond to market pressure. Financial crisis effects, pp. 207-283.
Clemente, J. A., Montanes, A. & Reyes, M. (1998). Testing for a unit root in variables with a double change in the mean. Economics , 59-84.
Dincer, B. & Eichengreen, W. (2014). Central transparency and independence. International journal of central banking, 189-259.
Disyatat, P. (2011). The bank lending channel revisited. Journal of credit, money and banking, 711-734.
Elliot, G., Rothenberg, T. J. & Stock, J. H. (1996). Efficient tests for an autoregressive unit root. Econometrica, 813-836.
Greene, W. (2007). Econometric analysis. Upper Saddle River: N.J: Prentice Hall.
Gujarati, D. N. (2004). Basic econometrics. New York: McGraw-Hill.
Gujarati, D. N. & Porter, C. D. (2010). Essentials of econometrics. New York: McGraw-Hill.
Havemann, D. W. (2014). The term structure of interest rate spread and economic activity in South Africa. Journal of International Finance, 86-112.
Havrylchyk, O. (2010). Macroeconomic credit risk model for stress testing the South African banking sector. Journal of economics, 65-72.
IMF. (2016). World economic outlook. International Monetary Fund (pp. 161-186). Bank of Canada: Bank of Canada.
Johansen, S. (1995). Likelihood-based inference in cointegrated vector autoregressive models. Oxford: Oxford University Press.
Jorda, O., Schularick, M. & Taylor, A. M. (2015). Sovereign versus banks, credit, crises, and consequences. New York: McGraw-Hill.
Kashyap, A. K. & Stein, J. C. (1994). Monetary policy and bank lending. New York: University of Chicago Press.
Kganyago, L. (2016). The impact of the Eurozone and global financial crisis on South Africa. Cape town convention center (pp. 123-150). Cape Town: South African Reserve Bank.
Kwiatkowski, D., Phillips, P. C. B., Schmidt, P. & Shin, Y. (1992). Testing the null hypothesis of stationarity against the alternative of a unit root. Journal of Econometrics, 159-178.
MAG. (2015). Assessing the macroeconomic impact of the transition to stronger capital and liquidity requirements. New York: Macroeconomic Assessment Group.
Mboweni, T. T. (2010). The implications of the global financial crisis in South Africa and the policy responses. Pretoria: South African Reserve Bank.
Meh, C. A. & Moran, K. (2010). The role of bank capital in the propagation of shocks. Journal of economic dynamics and control, 555-576.
Peersman, G. & Straub, R. (2006). Putting the New Keynesian model to test. Journal of International Finance, 135-143.
Pesaran, H. M. & Smith, R. (1995). Estimating long-run relationships from dynamic heterogeneous panels. Journal of Econometrics, 79-113.
SARB. (2015). Annual Report. Johannesburg: South African Reserve Bank.
SARB. (2016). Annual report. South African Reserve Bank (pp. 123-135). Cape Town: South African Reserve Bank.
Tabak, M. & Souto, T. (2010). Financial intermediation costs in low-income countries. Journal of International Finance, 140-155.
Van Roy, P. (2005, August 15). The impact of the 1988 Basel Accord on banks capital ratios and credit risk-taking. International Banking Regulations, pp. 125-142.
Vanhoose, D. (2007). Theories of banking behaviour under capital regulation. Journal of Banking and Finance, 3680-3697.
Were, M. & Wambua, J. (2014). What factors drive interest rate spreads of commercial banks? Empirical evidence from Kenya. Journal of banking and finance, 73-82.
Wickens, M. R. (1996). Interpreting cointegrating vectors and common stochastic trends. Journal of Econometrics, 235-257.
Woodford, M. (2012). Methods of policy accommodation at the interest rate lower bound. In M. Woodford, Macroprudentialism (pp. 145-160). New York: Oxford University Press.
How to Cite
Batsirai, S. V., Tsegaye, A., & Khamfula, Y. (2019). The Nexus between Macro-Prudential Banking Regulation, Interest Rate Spread and Monetary Policy in South Africa. Journal of Economics and Behavioral Studies, 10(6A(J), 141-151.
Research Paper