Determinants of commercial bank liquidity in South Africa

Abstract

This study examined the determinants of commercial bank liquidity in South Africa. The panel regression approach was used, applying panel data from twelve commercial banks over the period 2006 to 2016. A quantitative research method was used to investigate the relationship between bank liquidity and some microeconomic and bank-specific factors and between bank liquidity and selected macro-economic factors. The regression analysis for four liquidity ratios was conducted using the pooled ordinary least squares regression, fixed effects, random effects and the generalised methods of moments. However, the system generalised methods of moments approach was preferred over the other methods because it eliminated the problem of endogeneity. Results show that capital adequacy, size and gross domestic product have a positive and significant effect on liquidity. Loan growth and non-performing loans had a negative and significant effect on liquidity. Inflation had both a positive and a negative but an insignificant effect on liquidity. The study concluded that South African banks could enhance their liquidity positions by tightening their loan-underwriting criteria and credit policies. Banks should improve their credit risk management frameworks to be more prudent in their lending practices to improve the quality of the loan book to enhance liquidity. They also need to grow their capital levels by embarking on efficient revenue enhancements activities. Banks may also to look at their clients on an overall basis and not on transaction bases, and they need to improve non-interest revenue by introducing innovated products. The South African Reserve Bank could push for policies that might enhance capitalisation by ensuring that the sector is consolidated and thus merging smaller banks to create banks with stronger balance sheets and stronger capital base. This study contributes to the empirical research repository on the determinants of liquidity and more specifically, it identified the significant factors that affect South African commercial bank liquidity. Identifying the determinants of South African commercial bank liquidity will provide the South African Reserve Bank with insight into ways of enhancing liquidity management reforms, to improve the sector’s liquidity management practices and help to maintain a sound and liquid banking sector.