MODELLING NIGERIAN STOCK RETURNS WITH ARMA-EGARCH: A VOLATILITY ANALYSIS. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 9, n. 1, p. 351–365, 2025. DOI: 10.33003/fjs-2025-0901-3194. Disponível em: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/3194. Acesso em: 5 sep. 2025.