Alemho, J.E. et al. 2026. Forecasting Efficacy of Hybrid ARFIMA-FIGARCH Model: An Application to Returns and Volatility of the Nigerian All Share Index. FUDMA Journal of Sciences. 10, 13 (Aug. 2026), 220–226. DOI:https://doi.org/10.33003/fjs-2026-1013-5327.