ZHANG, Zijian. Quantitative Empirical Research on Portfolio Optimization Based on Sharpe Ratio and Market Index. Highlights in Business, Economics and Management, [S. l.], v. 61, p. 31–35, 2025. DOI: 10.54097/3ywfab90. Disponível em: https://hbem.org/index.php/OJS/article/view/538. Acesso em: 30 apr. 2026.