Effect of Central Bank of Nigeria Risk-Based Supervision on the Safety and Soundness of Microfinance Banks in Nigeria

The study examined the effect of Central Bank of Nigeria (CBN) Risk-Based Supervision (RBS) on the safety and soundness of microfinance banks in Nigeria, using capital adequacy and portfolio-at-risk as the basis. Specifically, the study sought to examine the effect of RBS composite risk rating on the capital adequacy ratio of microfinance banks in Nigeria; ascertain the effect of RBS corrective action plans on the portfolio-at-risk ratio of microfinance banks in Nigeria. To achieve these objectives, two research questions and hypotheses were raised. Relevant conceptual, theoretical, and empirical literature were examined. Ex post facto research design was employed. The data used in this study were sourced from CBN annual reports, CBN Financial Stability Reports, Nigeria Deposit Insurance Corporation (NDIC) reports, and the Nigeria Inter-Bank Settlement System (NIBSS). Descriptive statistics and Ordinary Least Square regression were employed in analysing the data. The study found that RBS composite risk ratings had a significant effect on the capital adequacy ratio of microfinance banks in Nigeria (where t-value of -5.647892 and p-value of 0.0004), and that RBS corrective action plans significantly affect the portfolio-at-risk ratio of microfinance banks in Nigeria (t-value of -4.312765 and p-value of 0.0018). In conclusion, the effect of CBN Risk-Based Supervision on the safety and soundness of microfinance banks in Nigeria reveals a nuanced relationship. The findings indicate that while RBS composite risk ratings and corrective action plans are theoretically and empirically crucial for enhancing microfinance bank capital adequacy and asset quality, the relationship is characterised by both significant positive contributions and structural limitations in translating supervisory interventions into comprehensive institutional soundness. The study recommended among other things that the CBN should strengthen the integration of RBS composite risk ratings into prudential decision-making frameworks to ensure that supervisory resources are efficiently allocated to microfinance banks with elevated risk profiles, and that the CBN should institutionalise a more robust follow-up mechanism for corrective action plans to ensure timely remediation of identified deficiencies and sustained improvement in asset quality