DAI, Weihan. Research on Investment Portfolio Strategy Under the Background of the COVID-19. Finance & Economics, [S. l.], v. 2, n. 4, p. 2162, 2024. DOI: 10.61173/4sbm0324. Disponível em: https://fe.deanfrancis.press/article/view/925. Acesso em: 4 nov. 2026.