Asymmetric Effects of COVID-19 Deaths and Oil Price Shocks on Stock Market Returns in Some Selected African Countries: Evidence From Nonlinear ARDL Approach. International Research in Economics and Finance, [S. l.], v. 8, n. 1, p. p1, 2026. DOI: 10.20849/iref.v8i1.1441. Disponível em: https://journal.chapjulypress.org/index.php/iref/article/view/2714. Acesso em: 7 mar. 2026.