QIAN, Yilin. A Comparative Analysis of The Markowitz Model and The Single-Index Model: Mathematical Efficiency Vs. Practical Simplicity. Journal of Innovation and Development, [S. l.], v. 14, n. 2, p. 262–274, 2026. DOI: 10.54097/cbdkd713. Disponível em: https://drpress.org/ojs/index.php/jid/article/view/32949. Acesso em: 21 aug. 2026.