International Banking, External Reserves, Sovereign Debt, and Cross-Border Lending Risk: Evidence and Policy Implications for Nigeria

Author's Information:

Golley, Israel Golley

University of Port Harcourt

Vol 03 No 07 (2026):Volume 03 Issue 07 July 2026

Page No.: 526-538

Abstract:

The relationship between the banking, external reserves, the quantity of sovereign debt and cross border lending risk in Nigeria was discussed in the paper. The new opportunities and threats of the emerging economies as the world financial markets become more globalised are compelling scientists to consider the impact of different macroeconomic variables in order to define their impact on the risk of lending. It entailed using Autoregressive Distributed Lag (ARDL) model to come up with a correlation between the different variables both in the short-run and in the long-run depending on the data between 2000 and 2024. The empirical results satisfy the following; all the long-term correlated risks are the international banking, external reserves and sovereign debt and cross-border lending risk. The positive impact of the study results which suggest that financial integration and greater size of the public debt is more perilous to the financial system is a major constructive contribution towards the cross-border lending risk in international banking and sovereign debt. A buffer of stabilization taking place in the form of one avenue of the utilisation of external reserves absorbs external shocks. The analysis observes that in addition to inflation the majority of the key macro-economic factors that lead to the lending risk are the exchange rate depreciation. In the current paper, a complex, macro-financial model is presented, which presupposes the impact of the international financial relations and local economic factors on the cross-border lending risk in Nigeria. The paper provides practical policy implications that underlie in the need to control the banking activities across the borders, introduce responsible practices of debt management, sufficient reserves buffer and achieve the macroeconomic stability.

KeyWords:

Banking on an international level; Foreign reserves; Sovereign debt; Cross border lending risk; ARDL; Nigeria; Financial stability.

References:

  1. Adrian, T., Qureshi, M. S., & Tsuruga, T. (2025). Bank to sovereign risk transmission: New evidence. IMF Global Financial Stability Notes. https://doi.org/10.5089/9798229012195.065.
  2. Akinyemi, J. O. O. (2025). International diversification strategy, resource intensity, and financial performance of listed banks in Nigeria. Cogent Business & Management, 12(1), 2579664. https://doi.org/10.1080/23311975.2025.2579664.
  3. Aldasoro, I., Beltrán,P., Grinberg, F., Mancini-Griffoli, T. (2023). The macro-financial effects of international bank lending on emerging markets. Journal of International Economics, 142, 103733. https://doi.org/10.1016/j.jinteco.2023.103733.
  4. Allen, F., & Gale, D. (2000).Financial contagion. Journal of Political Economy,108(1), 1–33. https://doi.org/10.1086/262109
  5. Arellano, C., Bai, Y., & Mihalache, G. (2022). Deadly debt crises: COVID-19 in emerging markets. Review of Economic Studies.
  6. Benigno, G., & Fornaro, L. (2022). ReserveAccumulation, Growth and Financial Crises.Journal of International Economics 9224(2).
  7. Bianchi (2022).The Research Agenda: Javier Bianchi on FinancialCrises and Prudential Policies. Economic Dynamics Newsletter, Review of Economic Dynamics, 23(1),April.
  8. Claessens, S., & Van Horen, N. (2021). Foreignbanks and financialstability. Journal of Financial Intermediation, 45https://doi.org/10.1016/j.jfi.2020.100856
  9. Demir, M., & Önder,Y. (2025). Financial connectivity in cross-border lendingand crises: Role of financial and legislative integration. Journal of International Financial Markets, Institutions and Money. Elsevier, 101(C).
  10. Dinger, V., & te Kaat, D. M. (2020).Cross-border capital flowsand bank risk-taking. Journal of Banking & Finance, 117, 105842. https://doi.org/10.1016/j.jbankfin.2020.105842.
  11. Douglas, D. W. (1984). Financial intermediation and delegated monitoring. The Review of Economic Studies, 51(3), 393–414. https://doi.org/10.2307/2297430.
  12. Eaton, J., & Gersovitz, M. (1981). Debt with potential repudiation: Theoretical and empirical analysis. The Review of Economic Studies, 48(2), 289–309. https://doi.org/10.2307/2296886.
  13. Forbes, K., & Warnock,F. (2021). Capital flow waves: surges,stops, flight, and retrenchment. National bureauof economic research
  14. Gondwe, S., Gwatidzo, T., & Mahonye, N. (2024). Cross-border banking and bank stability: Evidence from Sub-Saharan Africa. Journal of Banking Regulation, 26(2), 196–213. https://doi.org/10.1057/s41261-024-00254-x
  15. Gourinchas, P. O. (2023). International Macroeconomics: From the Great Financial Crisis to COVID-19, and Beyond. IMF Econ Rev 71,1–34. https://doi.org/10.1057/s41308-022-00171-x
  16. Gong, X., Wu, Z., Xiong, X., & Zhang,W. (2025). Sovereigncredit and international banking industry tail risk contagion: A complex network perspective. International Review of Economics & Finance, 99, 103992. https://doi.org/10.1016/j.iref.2025.103992.
  17. Hale, G., Kapan, T., & Minoiu, C. (2020). Shock transmission through cross-border bank lending: Credit and real effects. Review of Financial Studies, 33(10), 4839–4882. https://doi.org/10.1093/rfs/hhz147.
  18. Kalemli-Ozcan, S., Sorensen, B., & Yesiltas, S. (2012). Leverage across firms, banks, and countries. Journal of International Economics. Elsevier, 88(2). 284-298.
  19. Karolyi, G. A., Sedunov, J., & Taboada, A. G. (2023). Cross-border bank flows and systemic risk. Review of Finance, European Finance Association, 27(5), 1563–1614.
  20. Kose, M. A., Nagle, P., Ohnsorge, F., & Sugawara, N. (2021). Global debt database. World Bank.
  21. Longinus, O. C., & Ibim, G. Q. (2025). Financial Intermediation and Economic Growth: The Banking Function Perspective in Nigeria. International Journal of Economics and Financial Management (IJEFM), 10(2).
  22. Obstfeld, M., Shambaugh, J. C., & Taylor, A. (2010). Financial Stability, the Trilemma, and International Reserves. American Economic Journal: Macroeconomics, 2(2). 57-94
  23. Olowofela, O. E., Donfack,H. A., & Soh, C. W. (2025).Sustainable banking and bank stability in Nigeria: Empirical evidence from deposit money banks. Journal of Risk and Financial Management, 18(4), 211. https://doi.org/10.3390/jrfm18040211.
  24. Oyetade, D., & Muzindutsi, P. (2023). Countryrisk and financialstability: A focus on commercial banks in Africa. Risks, 11(11), 198. https://doi.org/10.3390/risks11110198.
  25. Roldan, F., & Sosa Padilla, C. (2025). The Perils of Bilateral Sovereign Debt. IMF Working Papers, 2025(235). Retrieved Mar 30,2026, from https://doi.org/10.5089/9798229027878.001.
  26. Xiao-Li, G., Zhuo-Cheng, W., Xiong, X., Wei, Z. (2025). Sovereign credit and international banking industry tail risk contagion: A complex network perspective. International Review of Economics & Finance, 99, 103992. https://doi.org/10.1016/j.iref.2025.103992.