Waluyo, Dwi Eko, Suganthi Ramasamy, and Siti Fitriyyatul Jamilah. “Portfolio Optimization Using Mean-Variance Model and Single Index Model: Evidence from Indonesian and Malaysian Capital Markets”. Asian Economic and Financial Review 15, no. 11 (November 5, 2025): 1731–1747. Accessed November 5, 2025. https://archive.aessweb.com/index.php/5002/article/view/5662.