XU, Jinwen. Optimization of a Technology Stock Portfolio Using the Markowitz Model. Finance & Economics, [S. l.], v. 3, n. 6, p. 9212, 2025. DOI: 10.61173/rbqtp588. Disponível em: https://fe.deanfrancis.press/article/view/294. Acesso em: 4 nov. 2026.