Forecasting Nigeria’s Oil Price Volatility: A Comparative Analysis of GARCH Models and Heston’s Stochastic Models

Authors

  • Omorogbe Joseph Asemota National Institute for Legislative Studies, Abuja, Nigeria
  • Mustapha Bello Department of Statistics, Faculty of Science, University of Abuja, Abuja, Nigeria
  • Samuel Olorunfemi Adams Department of Statistics, Faculty of Science, University of Abuja, Abuja, Nigeria

DOI:

https://doi.org/10.54536/ajase.v4i1.4693

Keywords:

EGARCH, FIGARCH, GARCH, Heston Model, IGARCH, Symmetric, TGARCH

Abstract

Modeling the volatility of crude oil prices is essential because it gives substantial influence to the oil producing countries. Nigeria, the biggest oil producer in Africa and a major participant in the world oil market, has significant economic difficulties changes in oil prices. This study uses 14 years of crude oil price data (2010–2023) to assess and compare the forecasting effectiveness of the Heston stochastic volatility model and GARCH-type models (GARCH, EGARCH, IGARCH, TGARCH, and FIGARCH). According to the analysis, GARCH-type models with Student’s t-distribution perform better than models with typical innovation. With a log-likelihood value of 12022.3, an AIC of -4.7012, a mean error (ME) of 0.0254, and a root mean square error (RMSE) of 0.0534, the EGARCH model outperformed the others. Nonetheless, the Heston model outperformed all GARCH-type models in terms of forecast accuracy, achieving the smallest error (0.000564) and successfully capturing fat-tail characteristics in daily return distributions. The study indicates that the Heston model offers a better fit and more accurate forecast than GARCH-type models using data from January to December 2023 for out-of-sample forecasting. These results provide stakeholders and policymakers with important information for controlling the volatility of Nigeria’s crude oil market.

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Published

2025-06-04

How to Cite

Asemota, O. J., Bello, M., & Adams, S. O. (2025). Forecasting Nigeria’s Oil Price Volatility: A Comparative Analysis of GARCH Models and Heston’s Stochastic Models. American Journal of Applied Statistics and Economics, 4(1), 41–57. https://doi.org/10.54536/ajase.v4i1.4693