WANG, Zicheng. Active Vs. Passive Investment in The Post-Pandemic U.S. Stock Market: A Sharpe Ratio-Based Portfolio Optimization Compared to the S&P 500. Highlights in Business, Economics and Management, [S. l.], v. 61, p. 41–45, 2025. DOI: 10.54097/j6kd1r14. Disponível em: https://hbem.org/index.php/OJS/article/view/540. Acesso em: 26 may. 2026.