Empirical analysis of adaptive market hypothesis using Sharpe Ratio for buy and sell opportunities in global indices . The Economics and Finance Letters, [S. l.], v. 12, n. 1, p. 120–142, 2025. DOI: 10.18488/29.v12i1.4102. Disponível em: https://archive.conscientiabeam.com/index.php/29/article/view/4102. Acesso em: 8 aug. 2026.