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Improving realised volatility forecast for emerging markets

Author

Listed:
  • Mesias Alfeus

    (University of Stellenbosch
    National Institute for Theoretical and Computational Sciences (NITheCS) South Africa)

  • Justin Harvey

    (University of Stellenbosch)

  • Phuthehang Maphatsoe

    (University of Stellenbosch)

Abstract

Accurate forecasting of realised volatility is essential for financial risk management and investment decision-making in emerging markets, taking the South African financial market as a benchmark. This study examines the predictive performance of four prominent models: HAR (Heterogeneous AutoRegressive), realised GARCH (Generalized AutoRegressive Conditional Heteroscedasticity), Recurrent Conditional Heteroskedasticity (RECH), and the Rough Fractional Stochastic Volatility (RFSV) models. These models are specifically tailored to capture the complex dynamics and long-range dependence observed in financial time series. We illustrate the challenges and limitations of these models outside the context of established markets. Our empirical findings reveal unique strengths for each model. The HAR model excels in capturing long-term volatility patterns, while realised GARCH models effectively capture volatility clustering and persistence. RECH model showcases their ability to forecast Value-at-Risk, while the RFSV model successfully captures irregular and long-memory characteristics. We provide empirical evidence that the South African financial market is rough. Moreover, this study provides valuable insights into forecasting realised volatility in the South African market, and the findings can assist practitioners and investors in making informed decisions and developing robust risk management strategies.

Suggested Citation

  • Mesias Alfeus & Justin Harvey & Phuthehang Maphatsoe, 2025. "Improving realised volatility forecast for emerging markets," Journal of Economics and Finance, Springer;Academy of Economics and Finance, vol. 49(1), pages 299-342, March.
  • Handle: RePEc:spr:jecfin:v:49:y:2025:i:1:d:10.1007_s12197-024-09701-x
    DOI: 10.1007/s12197-024-09701-x
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    References listed on IDEAS

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    More about this item

    Keywords

    Time series; Emerging markets; Econometric models; Value-at-risk; Implied volatility;
    All these keywords.

    JEL classification:

    • C10 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - General
    • C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets
    • G17 - Financial Economics - - General Financial Markets - - - Financial Forecasting and Simulation

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