C3 Measuring the Connectedness of the Nigerian Banking System Victor A. Malaolu1; Jonathan E. Ogbuabor2; Prof. Hyacinth Ichoku3 1DFID Partnership To Engage, Reform and Learn (PERL), Abuja Nigeria (
[email protected]; +2348033727965) 2Department of Economics, University of Nigeria, Nsukka (
[email protected]; +2348035077722) 3Department of Economics, University of Nigeria, Nsukka (
[email protected]; +2348057028180) Work in Progress Submitted to African Economic Research Consortium May 2020 1 Abstract One of the greatest challenges presently facing the Nigerian banking system is how to manage systemic risk. This is because every episode of bank failure in Nigeria usually involves many banks collapsing simultaneously, suggesting that the Nigerian banking system may be deeply interconnected so that financial contagion becomes an important issue in managing the system. Thus, this study investigates the connectedness of the Nigerian banking system based on the spillover approach of Diebold and Yilmaz (2009). The study extended the empirical approach by constructing generalized connectedness measures at various degrees of aggregation. The results show that: (i) the banking system in Nigeria is deeply interconnected with a mean total connectedness index of 84% over the full sample; (ii) First Bank of Nigeria Plc, Access Bank Plc, Guaranty Trust Bank Plc, United Bank for Africa Plc and Zenith Bank Plc exert dominant influence on the system and therefore have the potential to propagate systemic risks; (iii) Wema Bank Plc, Unity Bank