Santos, J.O. dos et al. 2023. Efficient Market Hypothesis, Covid-19 and Accumulated Return of Common Shares – Event Study of The Top Chinese Financial Institutions by Market Value Criterion. Revista Administração em Diálogo - RAD. 25, 1 (jan. 2023), 139–156. DOI:https://doi.org/10.23925/2178-0080.2023v25i1.90762.