The effect of investor sentiment on returns of JSE size-based indices under changing market conditions: Evidence from a Markov regime-switching model
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Purpose: The continuous unresolved debate that arises between traditional finance and behavioural finance frameworks has dominated empirical literature in recent years. Despite this, the limited literature extends the debate to size-based indices, especially in emerging markets like South Africa that are characterised by alternating market conditions and sentiment-induced markets. Consequently, the objective of this study is to examine the effect of market-wide investor sentiment on the Johannesburg Stock Exchange (JSE) size-based indices’ returns at bullish/bearish market conditions. Methodology: The Markov regime-switching model for the period April 2007 to March 2025 reveals that market-wide investor sentiment has a regime-specific and time-varying effect on JSE size-based indices’ returns. In bullish/bearish market conditions, investor sentiment has a positive significant effect on JSE size-based indices’ returns. However, the magnitude of such effects seems too great in bearish market conditions. Similarly, the JSE size-based indices’ returns are dominated by the bearish market condition, revealing its non-resilient nature to sentiment-induced markets and market fluctuations. Theoretical contribution: The study contributes to resolving the debate in literature that arises from the efficient market hypothesis and behavioural finance frameworks, by demonstrating that JSE size-based indices present adaptive behaviour as supported by the adaptive market hypothesis. Practical implications: Investors must factor in changing market conditions and sentiment levels in the market when determining whether to invest in JSE sized-based indices as it will contribute positively or negative to prospect returns. Policymakers must devise new policy reforms that curb unstable market conditions and noise trading as it contributes directly to alternating market efficiency.
Sustainable Development Goals (SDGs): SDG 8: Decent Work and Economic Growth; SDG 10: Reduced Inequalities; SDG 16: Peace, Justice and Strong Institutions
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This work (article) is licensed under a Creative Commons Attribution 4.0 International License.
References
Andleeb, R., & Hassan, A. (2023). Impact of investor sentiment on contemporaneous and future equity returns in emerging markets. SAGE Open, 13(3). https://doi.org/10.1177/21582440231193568
Ang, A., & Bekaert, G. (2002). International asset allocation with regime shifts. The Review of Financial Studies, 15(4), 1137–1187. https://doi.org/10.1093/rfs/15.4.1137
Antoniou, C., Doukas, J. A., & Subrahmanyam, A. (2013). Cognitive dissonance, sentiment, and momentum. Journal of Financial and Quantitative Analysis, 48(1), 245–275. https://doi.org/10.1017/S0022109012000592
Azevedo, A., Cavalcante, R. T., & Farias, A. (2023). The asymmetric effect of investor sentiment on the risk-return trade-off. Finance Research Letters, 58(Part A), 104361. https://doi.org/10.1016/j.frl.2023.104361
Bahrami, M. (2019). The impact of macroeconomic variables on stock market performance: Evidence from the Scandinavian region [Unpublished master’s thesis]. University of Gothenburg.
Bai, J., & Perron, P. (1998). Estimating and testing linear models with multiple structural changes. Econometrica, 66(1), 47–78.
Bai, J., & Perron, P. (2003). Computation and analysis of multiple structural change models. Journal of Applied Econometrics, 18(1), 1–22. https://doi.org/10.1002/jae.659
Baker, M., & Wurgler, J. (2006). Investor sentiment and the cross-section of stock returns. The Journal of Finance, 61(4), 1645–1680. https://doi.org/10.1111/j.1540-6261.2006.00885.x
Baker, M., & Wurgler, J. (2007). Investor sentiment in the stock market. Journal of Economic Perspectives, 21(2), 129–151. https://doi.org/10.1257/jep.21.2.129
Banz, R. W. (1981). The relationship between return and market value of common stocks. Journal of Financial Economics, 9(1), 3–18. https://doi.org/10.1016/0304-405X(81)90018-0
Barber, B. M., & Odean, T. (2001). Boys will be boys: Gender, overconfidence, and common stock investment. The Quarterly Journal of Economics, 116(1), 261–292. https://doi.org/10.1162/003355301556400
Beirne, J., Rausch, F., & Volz, U. (2024). Climate change and sovereign risk [Unpublished manuscript]. Asian Development Bank Institute.
Birru, J., & Young, T. (2023). Sentiment and uncertainty. Journal of Financial Economics, 147(2), 387–419. https://doi.org/10.1016/j.jfineco.2022.12.003
Bouteska, A., & Mili, M. (2023). Investor sentiment and stock returns: Asymmetric effects in developed and emerging markets. International Review of Financial Analysis, 89, 102789. https://doi.org/10.1016/j.irfa.2023.102789
Bouteska, A., Sharif, T., & Abedin, M. Z. (2023a). Does investor sentiment create value for asset pricing? An empirical investigation of the KOSPI-listed firms. Annals of Operations Research. https://doi.org/10.1007/s10479-023-05244-2
Brady, R. R. (2025). Does investor sentiment predict the S&P500? Evidence from the 1990s to the Covid-19 pandemic. Journal of Asset Management, 24(7), 531–547. https://doi.org/10.1057/s41260-023-00320-5
Brooks, C. (2019). Introductory econometrics for finance (4th ed.). Cambridge University Press.
Brown, G. W., & Cliff, M. T. (2004). Investor sentiment and the near-term stock market. Journal of Empirical Finance, 11(1), 1–27. https://doi.org/10.1016/j.jempfin.2002.12.001
Brown, G. W., & Cliff, M. T. (2005). Investor sentiment and asset valuation. The Journal of Business, 78(2), 405–440. https://www.jstor.org/stable/10.1086/427633
Chan, Y. C., Hameed, A., & Kang, W. (2013). Stock price synchronicity and liquidity. Journal of Financial Markets, 16(2), 414–438. https://doi.org/10.1016/j.finmar.2012.10.003
Chang, C., Chen, S. W., & Le, T. H. (2012). Does investor sentiment predict stock returns? Evidence from the Japanese stock market. Japan and the World Economy, 24(3), 199–207. https://doi.org/10.1016/j.japwor.2012.04.001
Chiang, T. C. (2023). Inflation and stock returns: A comparative analysis of developed and emerging markets. International Review of Economics & Finance, 85, 1–18. https://doi.org/10.1016/j.iref.2023.01.005
Chkili, W., & Nguyen, D. K. (2014). Exchange rate movements and stock market returns in a regime-switching environment: Evidence for BRICS countries. Research in International Business and Finance, 31, 46–56. https://doi.org/10.1016/j.ribaf.2013.11.001
Dalika, R., Muzindutsi, P. F., & Surujlal, J. (2014). The effect of investor sentiment on the risk and return of size-based portfolios on the JSE. Journal of Economic and Financial Sciences, 7(3), 661–678. https://doi.org/10.4102/jef.v7i3.209
Dash, S. R. (2016). Does investor sentiment as conditioning information help to explain stock returns behaviour? A test of alternative asset pricing model. Review of Behavioral Finance, 8(1), 70–90. https://doi.org/10.1108/RBF-03-2014-0022
Dhankar, S., & Shankar, D. (2016). Relevance and evolution of adaptive markets hypothesis: A review. Journal of Indian Business Research, 8(3), 196–215. https://doi.org/10.1108/JIBR-12-2015-0125
Fama, E. F. (1965). The behavior of stock-market prices. The Journal of Business, 38(1), 34–105. https://www.jstor.org/stable/2350752
Gong, X., Liu, Y., & Xiong, X. (2022). Investor attention and market microstructure: Evidence from the advance/decline ratio. Journal of Financial Markets, 59, 100689. https://doi.org/10.1016/j.finmar.2021.100689
Hamilton, J. D. (1989). A new approach to the economic analysis of nonstationary time series and the business cycle. Econometrica, 57(2), 357–384. https://doi.org/10.2307/1912559
Hamurcu, C. (2021). The relationship between consumer confidence index and stock returns: Evidence from Borsa Istanbul. Journal of Economics Finance and Accounting, 8(2), 82–90. https://doi.org/10.17261/Pressacademia.2021.1397
He, Z. (2022). The asymmetric impact of investor sentiment on the risk-return relationship: Evidence from China. International Review of Economics & Finance, 80, 1026–1041. https://doi.org/10.1016/j.iref.2022.03.014
Henchiri, J., & Mounica, G. (2022). Investor sentiment and stock returns: Evidence from Morocco and Tunisia. Journal of Economics and Financial Analysis, 6(1), 1–20.
Hengelbrock, J., Theissen, E., & Westheide, C. (2011). Market response to investor sentiment. Journal of Business Finance & Accounting, 38(9–10), 1142–1173. https://doi.org/10.1111/j.1468-5957.2011.02258.x
Huang, D., Jiang, F., Tu, J., & Zhou, G. (2015). Investor sentiment aligned: A powerful predictor of stock returns. The Review of Financial Studies, 28(3), 791–837. https://doi.org/10.1093/rfs/hhu080
Jaffar, S., Kunjal, D., Gumede, S., & Muzindutsi, P. F. (2025). Industry-specific effects of geopolitical risk on the returns of the South African stock market under different market conditions. Management Dynamics: Journal of the Southern African Institute for Management Scientists, 34(1), 60–74.
Junaeni, I. (2020). The impact of consumer confidence on stock market participation [Unpublished doctoral dissertation]. University of Indonesia.
Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263–291. https://doi.org/10.2307/1914185
Korley, M., & Giouvris, E. (2021). The regime switching behaviour of exchange rates and frontier stock markets in Sub-Saharan Africa. Journal of Economics and Business, 115, 105970. https://doi.org/10.1016/j.jeconbus.2020.105970
Koy, A., & Akkaya, M. (2017). The relationship between consumer confidence index and stock market returns: Evidence from Turkey. International Journal of Economics and Financial Issues, 7(2), 243–247.
Kumari, J., & Mahakud, J. (2015). Does investor sentiment predict the asset volatility? Evidence from emerging stock market India. Journal of Behavioral and Experimental Finance, 8, 25–39. https://doi.org/10.1016/j.jbef.2015.10.002
Lawrence, B., Moodley, F., & Ferreira-Schenk, S. (2024). Macroeconomic determinants of the JSE size-based industries connectedness: Evidence from changing market conditions. Cogent Economics & Finance, 12(1), 2397454. https://doi.org/10.1080/23322039.2024.2397454
Li, X. (2021). Global investor sentiment and sovereign bond returns in emerging markets. Journal of International Financial Markets, Institutions and Money, 70, 101257. https://doi.org/10.1016/j.intfin.2020.101257
Lintner, J. (1965). The valuation of risk assets and the selection of risky investments in stock portfolios and capital budgets. The Review of Economics and Statistics, 47(1), 13–37. https://doi.org/10.2307/1924119
Lintner, J. (1969). The aggregation of investor's diverse judgments and preferences in purely competitive security markets. Journal of Financial and Quantitative Analysis, 4(4), 347–400. https://doi.org/10.2307/2330069
Liu, Y., Wang, Y., & Zhang, J. (2020). Global investor sentiment and cross-border stock return comovement. Journal of International Money and Finance, 108, 102162. https://doi.org/10.1016/j.jimonfin.2020.102162
Liutvinavicius, M., Balcunas, A., & Krusinskas, R. (2017). The impact of US investor sentiment on European stock markets. Journal of Economics and Business, 91, 1–12. https://doi.org/10.1016/j.jeconbus.2017.02.001
Lo, A. W. (2004). The adaptive markets hypothesis: Market efficiency from an evolutionary perspective. Journal of Portfolio Management, 30(5), 15–29. https://doi.org/10.3905/jpm.2004.442611
Ma, Y., Wang, L., & Xiong, S. (2018). Investor sentiment and stock returns: A quantile regression approach. The North American Journal of Economics and Finance, 46, 34–47. https://doi.org/10.1016/j.najef.2018.03.005
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).
Magubane, T. (2025). Macroeconomic shocks and financial cycle dynamics in South Africa [Unpublished PhD thesis]. University of Pretoria.
Marx, J. (2016). Financial management in Southern Africa (5th ed.). Cape Town: Pearson.
Mbanga, C., Darrat, A. F., & Park, J. C. (2018). Investor sentiment and aggregate stock returns: A spatial analysis. The Journal of Financial Research, 41(4), 723–753. https://doi.org/10.1111/jfir.12183
Mishra, P. K., Das, K. B., & Pradhan, B. B. (2020). Macroeconomic variables and stock market performance: Evidence from India. Asian Economics and Financial Review, 10(6), 642–658. https://doi.org/10.18488/journal.aefr.2020.106.642.658
Moodley, F., & Lawrence, B. (2026). The impact of market dynamics and geopolitical uncertainty on property return: A comparative analysis of BRICS countries. Risks, 14(3), 55. https://doi.org/10.3390/risks14030055
Moodley, F. (2025). The co-movement of JSE size-based indices: Evidence from a time–frequency domain. Journal of Risk and Financial Management, 18(11), 633. https://doi.org/10.3390/jrfm18110633
Moodley, F., Ferreira-Schenk, S., & Matlhaku, K. (2025). The effects of investor sentiment on stock return indices under changing market conditions: Evidence from South Africa. International Journal of Financial Studies, 13(2), 70. https://doi.org/10.3390/ijfs13020070
Moodley, F., Ferreira-Schenk, S., & Matlhaku, K. (2024). Effect of market-wide investor sentiment on South African government bond indices of varying maturities under changing market conditions. Economies, 12(10), 265. https://doi.org/10.3390/economies12100265
Moodley, F., Nzimande, N., & Muzindutsi, P. F. (2022). Stock returns indices and changing macroeconomic conditions: Evidence from the Johannesburg Securities Exchange. The Journal of Accounting and Management, 12(3).
Mossin, J. (1966). Equilibrium in a capital asset market. Econometrica, 34(4), 768–783. https://doi.org/10.2307/1910098
Muguto, L., Muzindutsi, P. F., & Muteba Mwamba, J. W. (2019). Investor sentiment and stock returns in South Africa: A nonlinear ARDL approach. Journal of Economics and Financial Sciences, 12(1), a211. https://doi.org/10.4102/jef.v12i1.211
Muguto, L., Muzindutsi, P. F., & Muteba Mwamba, J. W. (2022). The impact of investor sentiment on stock return volatility: Evidence from the Johannesburg Stock Exchange. Cogent Economics & Finance, 10(1), 2038860. https://doi.org/10.1080/23322039.2022.2038860
Muzindutsi, P. F., Muguto, L., & Muteba Mwamba, J. W. (2021). The dynamic effect of money supply shocks on stock prices in an emerging market: A Markov-switching approach. African Journal of Economic and Management Studies, 14(1), 22–37. https://doi.org/10.1108/AJEMS-01-2022-0021
Muzindutsi, P. F., Muguto, L., & Muteba Mwamba, J. W. (2023). The dynamic effect of money supply shocks on stock prices in an emerging market: A Markov-switching approach. African Journal of Economic and Management Studies, 14(1), 22–37. https://doi.org/10.1108/AJEMS-01-2022-0021
OECD. (2022). OECD Consumer Confidence Index (CCI). Retrieved May 15, 2025, from https://www.oecd.org/sdd/leading-indicators/oecd-consumer-confidence-index-cci.htm
Olsen, R. A. (1998). Behavioral finance and its implications for stock-price volatility. Financial Analysts Journal, 54(2), 10–18. https://doi.org/10.2469/faj.v54.n2.2182
Pham, D. H. B., Iyke, B. N., & Sharma, S. S. (2025). Investor sentiment and stock market outcomes in emerging economies. Journal of Banking & Finance (forthcoming).
Rahman, M. L., & Shamsuddin, A. (2019). Investor sentiment and stock returns: New evidence from the consumer confidence index. International Review of Finance, 19(4), 759–776. https://doi.org/10.1111/irfi.12197
Reis, P. M., & Pinho, C. (2020). A survey on the advance/decline line as a market sentiment indicator. Journal of Behavioral and Experimental Finance, 27, 100366. https://doi.org/10.1016/j.jbef.2020.100366
Ross, S. A. (1976). The arbitrage theory of capital asset pricing. Journal of Economic Theory, 13(3), 341–360. https://doi.org/10.1016/0022-0531(76)90046-6
Rupande, L., Muguto, L., & Muzindutsi, P. F. (2019). Investor sentiment and stock return volatility: Evidence from the Johannesburg Stock Exchange. Cogent Economics & Finance, 7(1), 1600233. https://doi.org/10.1080/23322039.2019.1600233
Sakariyahu, R., Paterson, A., Chatzivgeri, E., & Lawal, R. (2023). Changing noise in the stock market: An inquiry into the dynamics of investor sentiment and asset pricing. Review of Quantitative Finance and Accounting, 61, 1469–1503. https://doi.org/10.1007/s11156-023-01214-8
Salur, T., & Ekinci, A. (2023). Investor sentiment and market anomalies: Evidence from European markets. Borsa Istanbul Review, 23(1), 211–225. https://doi.org/10.1016/j.bir.2022.10.003
Sharif, T. (2025). Monetary policy shocks and stock market behaviour in emerging economies. Emerging Markets Review (forthcoming).
Sharpe, W. F. (1964). Capital asset prices: A theory of market equilibrium under conditions of risk. The Journal of Finance, 19(3), 425–442. https://doi.org/10.1111/j.1540-6261.1964.tb02865.x
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
Shleifer, A., & Summers, L. H. (1990). The noise trader approach to finance. Journal of Economic Perspectives, 4(2), 19–33. https://doi.org/10.1257/jep.4.2.19
Simon, H. A. (1982). Models of bounded rationality: Empirically grounded economic reason. Cambridge, MA: MIT Press.
Smales, L. A. (2017). Investor sentiment and the price of oil. Energy Economics, 66, 511–519. https://doi.org/10.1016/j.eneco.2017.07.010
Thirumala, V., Sreekanth, N., & Sasidhar, B. (2023). Investor sentiment and stock market behaviour: A review of literature. International Journal of Finance & Economics, 28(2), 1205–1219. https://doi.org/10.1002/ijfe.2478
Vuong, N. B., & Suzuki, Y. (2022). The moderating effect of market-specific factors on the return predictability of investor sentiment. SAGE Open, 12(2). https://doi.org/10.1177/21582440221114322
Wood, A. S. (2010). Behavioural finance: A review of the literature and a proposed model. Investment Analysts Journal, 39(72), 1–16. https://doi.org/10.1080/10293523.2010.11082525
Xu, Y., & Green, C. J. (2013). Asset pricing with investor sentiment: Evidence from Chinese stock markets. The Manchester School, 81(1), 1–20. https://doi.org/10.1111/j.1467-9957.2011.02283.x
Zouaoui, M., Nouvrigat, G., & Beer, F. (2011). How does investor sentiment affect stock market crises? Evidence from panel data. Financial Review, 46(4), 723–747. https://doi.org/10.1111/j.1540-6288.2011.00318.x