Corporate Governance and the Performance of Quoted Deposit Money Banks in Nigeria
Abstract
This study investigates the impact of corporate governance mechanisms on the financial and market-based performance of listed Deposit Money Banks in Nigeria. Utilizing a balanced panel dataset comprising 14 quoted DMBs on the Nigerian Exchange Group over a ten-year period from 2016 to 2025, the study employed multiple regression analysis within a panel data framework (Fixed and Random Effects models validated by the Hausman specification test). Corporate governance is operationalized through five structural attributes: Board Size , Board Independence , Board Gender Diversity , Board Diligence/Meeting Frequency and Audit Committee Effectiveness . Financial performance is evaluated using Accounting-based metrics-Return on Assets and Return on Equity alongside a market-based valuation proxy, Tobin’s Q (TQ). The findings reveal that Board Size has a positive and significant effect on accounting returns, indicating that larger boards in Nigerian banks leverage diversified institutional resources and advisory networks. Conversely, Board Independence exhibits an insignificant influence on bank performance, pointing to deep-seated institutional constraints where nominal independence does not translate into autonomous executive monitoring. Board Gender Diversity and Audit Committee Effectiveness exert positive and statistically significant impacts on performance metrics, proving that boardroom inclusivity and rigorous internal oversight mitigate systemic vulnerabilities and operational risks. Finally, Board Meeting Frequency displays a negative and significant relationship with performance, implying that excessive emergency meetings serve as a reactive mechanism to operational distress rather than a proactive planning channel. Based on these insights, the study recommends that the Central Bank of Nigeria and the Securities and Exchange Commission shift from rigid compliance-based monitoring to substantive oversight frameworks that preserve the functional autonomy of independent directors, foster gender mainstreaming and streamline board operations to enhance long-term shareholder value and sectoral stability.
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