MOUNIR, Amine. Does Markowitz’s Mean–Variance Model Matter During Turmoil Periods? Lessons from the COVID Crisis. Indian Journal of Finance, [S. l.], v. 18, n. 1, p. 29–41, 2024. DOI: 10.17010/ijf/2024/v18i1/171339. Disponível em: https://www.indianjournalofcapitalmarkets.com/index.php/IJF/article/view/171339. Acesso em: 5 aug. 2025.