SAFITRI, Heni. Black Swan Event on JCI Value and Sectoral Index for February-April 2020: Effects of Covid-19 in Indonesian Stock Exchange. Journal of Business and Management Studies, [S. l.], v. 4, n. 1, p. 57–63, 2022. DOI: 10.32996/jbms.2022.4.1.8. Disponível em: https://al-kindipublishers.org/index.php/jbms/article/view/2782. Acesso em: 14 mar. 2026.