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The Effect of a Sovereign Credit Rating Change on Share Prices of the South African Retail Banks

  • M. C. de Wet
  • I. Botha
Conference paper
Part of the Springer Proceedings in Business and Economics book series (SPBE)

Abstract

The increasing role of credit rating agencies in emerging markets and the various impacts that these rating agencies have on emerging market economies have become of great interest in modern finance. Recent empirical evidence suggests that credit rating downgrades have the potential to disrupt economies. To minimise and control such disruption, it is essential to establish what exactly these disruptions entitles. This study aims to determine whether a South African sovereign credit rating downgrade caused abnormal returns in the shares of local retail banks. Furthermore, the study sets out to determine whether A South African sovereign credit rating downgrade resulted in significant volatility spillover on the shares of South African retail banks. An event study analysis will be implemented to determine whether a downgrade caused abnormal returns, and the presence of volatility spillovers will be determined by means of a GARCH-BEKK model. The main findings indicates that a South African sovereign credit downgrade did result in negative cumulated abnormal returns, and that a change in the South African sovereign credit rating did cause volatility in the shares of South African retail banks. These share price effects can have various implications, such as spillovers to other parts of the equity market, as well as negative spillovers to the real economy. In order to mitigate the potential implications of a South African sovereign credit rating change through the South African retail banking sector, the effects of such a change must first be determined, making this an important study to conduct.

References

  1. Afonso, A., Gomes, P., & Taamouti, A. (2014). Sovereign credit ratings, market volatility and financial gains. Computational Statistics & Data Analysis, 76, 20–33.CrossRefGoogle Scholar
  2. Almeida, H., Cunha, I., Ferreira, M. A., & Restrepo, F. (2017). The real effects of credit ratings: The sovereign ceiling channel. Journal of Finance, 71(1), 249–290.CrossRefGoogle Scholar
  3. Baker, L. (2015). The evolving role of finance in South Africa’s renewable energy sector. Geoforum, 68, 146–156.CrossRefGoogle Scholar
  4. Bikhchandani, S., & Sharma, S. (2001). Herd behaviour in financial markets. International Monetary Fund, 3(47), 279–310.Google Scholar
  5. Borensztein, E., Cowan, K., & Valenzuela, P. (2013). Sovereign ceilings “lite”? The impact of sovereign ratings on corporate ratings. Journal of Banking & Finance, 37(11), 4014–4024.CrossRefGoogle Scholar
  6. Brooks, C. (2013). Introductory econometrics for finance (3rd ed.). Cambridge: Cambridge University Press.Google Scholar
  7. Brooks, R., Faff, R. W., Hillier, D., & Hillier, J. (2004). The National market impact of sovereign rating changes. Journal of Banking & Finance, 28, 233–250.CrossRefGoogle Scholar
  8. Bumann, S., Hermes, N., & Lensink, R. (2013). Financial liberalisation and economic growth: A meta-analysis. Journal of International Money and Finance, 33, 255–281.CrossRefGoogle Scholar
  9. Christopher, R., Kim, S. J., & Wu, E. (2012). Do Sovereign credit ratings influence regional stock and bond market interdependencies in emerging countries? Journal of International Financial Markets, Institutions and Money, 22(4), 1070–1089.CrossRefGoogle Scholar
  10. Correa, R., Lee, K., Sapriza, H., & Suarez, G. A. (2014). Sovereign credit risk, banks’ government support, and bank stock returns around the world. Journal of Money, Credit and Banking, 46(1), 93–121.CrossRefGoogle Scholar
  11. Fabozzi, J. F. (2007). Fixed income analysis (2nd ed.). New Jersey: Wiley.Google Scholar
  12. Gatev, E., Schuermann, T., & Strahan, P. E. (2009). Managing bank liquidity risk: How deposit-loan synergies vary with market conditions. The Review of Financial Studies, 3(22), 995–1020.CrossRefGoogle Scholar
  13. Gujarati, D. N., & Porter, D. C. (2009). Basic econometrics (5th ed.). New York: McGraw-Hill.Google Scholar
  14. International Monetary Fund. (2014). Financial system stability assessment. South Africa. No 14(340).Google Scholar
  15. Kaminsky, G., & Schmukler, S. L. (2002). Emerging markets instability: Do sovereign ratings affect country risk and stock returns? World Bank Economic Review, 16(2), 171–195.CrossRefGoogle Scholar
  16. Koop, G. (2009). Analysis of economic data (3rd ed.). West Sussex: Wiley.Google Scholar
  17. Lakshmi, V. D. M. V., & Joshi, M. (2016). Market reaction to listing of stockson F&O segment of NSE: Application of event study methodology. The IUP Journal of Applied Economics, 15(3), 37–76.Google Scholar
  18. Lee, N., & Lings, I. (2008). Doing business research: A guide to theory and practice. London: SAGE Publications Ltd.Google Scholar
  19. Liu, X., An, H., Huang, S., & Wen, S. (2017). The evolution of spillover effects between oil and stock. Physica A: Statistical Mechanics and its Applications, 465(1), 374–383.CrossRefGoogle Scholar
  20. Makiono, R. (2016). Stock market responses to chemical accidents in Japan: An event study. Journal of Loss Prevention in the Process Industries, 40(1), 453–458.CrossRefGoogle Scholar
  21. Mlambo, K., & Ncube, M. (2011). Competition and efficiency in the banking sector in South Africa. African Development Review, 23(1), 4–15.CrossRefGoogle Scholar
  22. Mohammadi, H., & Tan, Y. (2015). Return and volatility spillovers across equity markets in Mainland China, Hong Kong and the United States. Econometrics, 3(2), 215–232.CrossRefGoogle Scholar
  23. Nading, A. (2015). An empirical study of stock split announcements of select BSE sectors using event study methodology. SDMIMD Journal of Management, 6(1), 1–12.CrossRefGoogle Scholar
  24. Orhan, E., & Yusuf, V. (2014). Understanding the sovereign credit ratings of emerging markets. Emerging Market Review, 20(1), 42–57.Google Scholar
  25. Shen, C. H., Huang, Y. L., & Hasan, I. (2012). Asymmetric benchmarking in bank credit rating. Journal of International Financial Markets, Institutions and Money, 22, 171–193.Google Scholar
  26. Standard & Poor. (2017). S&P global ratings. Available: https://www.Standardandpoors.com/en_web/guest/home. (Accessed: 17 June 2017).
  27. Vaaler, P. M., & McNamara, G. (2004). Crisis and competition in expert organizational decision making: Credit-rating agencies and their response to turbulence in emerging economies. Organizational Science, 6(15), 687–703.Google Scholar
  28. Williams, G., Alsakka, R. & ap Gwilym, O. (2015). Does sovereign creditworthiness affect bank valuations in emerging markets? Journal of International Financial Markets, Institutions and Money, 36(1), 113–129.Google Scholar
  29. Vernazza, D. R., & Nielsen, E. F. (2015). The damaging bias of sovereign ratings. Economic Notes, 44(2), 361–408.CrossRefGoogle Scholar
  30. Vaaler, P. M., & Hanusch, M. (2013). Credit rating agencies and elections in emerging democracies: Guardians of fiscal discipline? Economic Letters, 119, 251–254.CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Department of AccountancyUniversity of JohannesburgJohannesburgSouth Africa

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