Macroeconomic uncertainty and ETF return volatility in South Africa: Implications for sustainable passive investment strategies
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Purpose: This study investigates the effect of macroeconomic uncertainty, namely inflation, money supply, long-term interest rates and the real effective exchange rate, on the return volatility of four South African exchange-traded funds listed on the Johannesburg Stock Exchange, addressing a gap in emerging-market ETF volatility literature. Methodology: Monthly data from November 2010 to December 2025 were analysed using univariate GARCH, GJR-GARCH, and E-GARCH models, with model selection guided by the Schwarz information criterion and robustness confirmed via ARCH-LM, unit root, and Nyblom stability tests. Results: All four ETF indices exhibit ARCH effects and volatility clustering; for three of the four ETFs, positive return shocks increase volatility more than negative shocks of equal magnitude, and inflation, money supply, and long-term interest rate growth significantly raise volatility only for the STXSWX index. Theoretical contribution: The paper extends the largely spillover-focused literature on South African ETF volatility by isolating the direct macroeconomic drivers of volatility, offering an emerging-market counterpoint to studies concentrated on developed markets. Practical implications: Findings suggest that passive investors and fund managers should treat the STXSWX index with caution during periods of macroeconomic instability and factor asymmetric shock behaviour into portfolio rebalancing decisions.
Sustainable Development Goals (SDGs): SDG 8: Decent Work and Economic Growth; SDG 9: Industry, Innovation and Infrastructure; SDG 10: Reduced Inequalities
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This work (article) is licensed under a Creative Commons Attribution 4.0 International License.
References
Abaidoo, R. & Agyapong, E.K. (2023). Macroeconomic risk, uncertainty and financial market development: Emerging markets perspective. Global Business Review, 1(1). https://doi.org/10.1177/09721509221145
Algieri, B., Aquino, A., Leccadito, A. & Succurro, M. (2026). Assessing the driving forces of clean and traditional energy exchange-traded funds returns and their time-varying correlation. Heliyon, 12(9). https://doi.org/10.1016/j.heliyon.2026.e44981
Ali, N., A.M. Nassir, T. Hassan, & S.Z. Abidin. (2010). Short run stock overreaction: Evidence from Bursa Malaysia. International Journal of Economics and Management 4 (2), 319–333.
Barberis, N., & R. Thaler. (2003). A survey of behavioral finance. In Handbook of the economics of finance, vol. 1(B), 1053–1128. Amsterdam: North Holland. https://doi.org/10.1016/S1574-0102(03)01027-6
Blitz, D. & Huij, J. (2012). Evaluating the performance of global emerging markets equity exchange-traded funds. Emerging markets review, 13(2), 149-158. https://doi.org/10.1016/j.ememar.2012.01.004
Caldara, D., Fuentes-Albero, C., Gilchrist, S. & Zakrajšek, E. (2016). The macroeconomic impact of financial and uncertainty shocks. European Economic Review, 88(1),185-207. https://doi.org/10.1016/j.euroecorev.2016.02.020
Charteris, A. (2013). The price efficiency of South African exchange traded funds. Investment Analysts Journal, 42(78), 1-11. https://doi.org/10.1080/10293523.2013.11082558
Cheteni, P., Matsongoni, H. & Umejesi, I. (2025). Inflation targeting and the rapid expansion of the South African economy. Cogent Social Sciences, 11(1), 2469374e. https://doi.org/10.1080/23311886.2025.2469374
Cutler, D.M., J.M. Poterba, & L.H. Summers. (1988). What moves stock prices? Journal of Portfolio Management, 15 (3), 4–12. https://doi.org/10.3905/jpm.1989.409212
Gastineau, G.L. (2010). The exchange-traded funds manual. John Wiley & Sons. https://doi.org/10.1002/9781118266946
Gvazava, A. (2026). Impact of macroeconomic events on ETF performance: Event study analyses. https://digikogu.taltech.ee/et/Item/704faa9c-4076-422f-b93d-79927a6bb35b
Hussain, S. & Chen, J.H. (2025). The spillover and leverage effects and trading volume of FinTech Exchange-Traded Funds. Investment Analysts Journal, 54(2), 139-166. https://doi.org/10.1080/10293523.2024.2379097
Islamiah & Kusmayadi, I. (2026). Banking stock market reaction to the announcement Bank Indonesia interest rate event: Announcement of bi benchmark interest rate reduction, by the board of governors meeting, August 19, 2025. Al-Kharaj: Journal of Islamic Economic and Business, 8(1), 1533-1538. https://doi.org/10.24256/kharaj.v8i1.9605
Kapoor, S. & Prosad, J.M. (2017). Behavioural finance: A review. Procedia computer science, 122, 50-54. https://doi.org/10.1016/j.procs.2017.11.340
Kunjal, D. (2023a). Investor attention and exchange traded fund returns in South Africa: The role of investors’internet search activity. Financial Studies, 27(3), 40-56. https://www.icfm.ro/fs.icfm.ro/FS3.2023.pdf#page=41
Kunjal, D. (2023b). The impact of COVID-19 on the returns of South African exchange traded funds. Acta Universitatis Danubius. Œconomica, 19(2), 258-268. https://dj.univ-danubius.ro/index.php/AUDOE/article/view/2223
Kunjal, D., Peerbhai, F. & Muzindutsi, P.F. (2021). The performance of South African exchange traded funds under changing market conditions. Journal of Asset Management, 22(5), 350-359. https://doi.org/10.1057/s41260-021-00227-z
Kunjal, D., Peerbhai, F. & Muzindutsi, P.F. (2022). Political, economic, and financial country risks and the volatility of the South African Exchange Traded Fund market: A GARCH-MIDAS approach. Risk Management, 24(3), 236-258. https://doi.org/10.1057/s41283-022-00093-y
Kunjal, D., Peerbhai, F., & Muzindutsi, P. F. (2024). The effect of disaggregated country risk on the returns of the South African exchange traded fund market. Journal of Economics and Financial Analysis, 8(1), 1-34. https://ojs.tripaledu.com/jefa/article/view/88
Lettau, M. & Madhavan, A. (2018). Exchange-traded funds 101 for economists. Journal of economic perspectives, 32(1), 135-154. https://doi.org/10.1257/jep.32.1.135
Madondo, L. & Kunjal, D. (2025). Do Foreign Equity ETFs Provide Diversification Benefits for South African Investors Under Bull and Bear Markets?. International Journal of Management, Accounting & Economics, 12(9). https://doi.org/10.22034/ijmae.2025.532316.1803
Moodley, F., & Lawrence, B. (2026). The effect of geopolitical uncertainty and macroeconomic variables on JSE-headline indices return volatility. International Journal of Applied Research in Business and Management, 7(7). https://doi.org/10.51137/wrp.ijarbm.772
Moodley, F., Lawrence, B. & Tabash, M.I. (2025). Are macroeconomic variables a determinant of ETF flow in South Africa under different economic conditions?. Economies, 13(9), 260. https://doi.org/10.3390/economies13090260
Nawaz, S., Ziberi, B.F. and Chandio, S., 2026. Volatility Analysis: An Empirical Investigation from South Asian Stock Markets Using the GARCH Model. International Journal of Emerging Business and Economic Trends, 5(1), 85-101.
Ozcelebi, O., McIver, R. & Kang, S.H. (2025). The dynamics of frequency connectedness between technology ETFs and uncertainty indices under extreme market conditions. Financial Innovation, 11(1), 81. https://doi.org/10.1186/s40854-025-00760-5
Pandey, P.N. (2025). ETF Risk-Return, and Price Discovery in Crisis Regimes: Evidence from Indian Markets. Available at SSRN 5899923. Available at SSRN: https://ssrn.com/abstract=5899923 or http://dx.doi.org/10.2139/ssrn.5899923
Radev, L., Golitsis, P. & Mitreva, M. (2023). Economic and financial determinants of gold ETF price volatility on the US futures market (COMEX). Journal of economics, 8(2), 12-26.
Shenjere, P.A., Ferreira-Schenk, S. & Moodley, F. (2025). Does investor sentiment influence South African ETF flows during different market conditions?. Economies, 13(1), 10. https://doi.org/10.3390/economies13010010
Starr, C. (2025). Volatility spillover between Exchange-Traded Funds on the Johannesburg Stock Exchange. (Master’s dissertation, University of Cape Town).
Wang, Y. (2025). ETF-Driven Asset Pricing Dynamics: Essays on Network Spillovers, Threshold Effects, and Factor Investing (Doctoral dissertation, University of Guelph).