This study investigates the effects of liquidity regulation, specifically the liquidity coverage ratio (LCR), on the capital structure of South African banks, with a focus on debt maturity composition. Using panel data covering the period 2015–2024, the analysis applies the Generalized Method of Moments (GMM) estimator to address potential endogeneity concerns. The findings reveal a significant positive relationship between LCR and banks’ total and long-term debt ratios, indicating a shift towards more stable funding structures. In contrast, the LCR is negatively associated with short-term debt. These results suggest that stricter liquidity requirements encourage banks to rely less on short-term funding and more on long-term debt instruments. Although the analysis is limited to a small sample of leading South African banks, the findings provide important insights into the structural implications of liquidity regulation. The study highlights the need for regulators to consider how liquidity requirements shape banks’ financing decisions within broader macroprudential frameworks. By promoting stable funding structures, liquidity regulations enhance banking sector resilience, protect depositors, and support sustainable credit provision. This study contributes novel evidence from an emerging market and addresses a gap in the post-crisis financial regulation literature by linking liquidity regulation to debt maturity profiles.
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