Widya Novita Sari, Dita Fitriani, Indri Widya Wulandari, and Maria Yovita R Pandin. 2023. “Optimal Portfolio Selection Using the Single Index Method on LQ45 Shares in the Banking Sector”. Finance : International Journal of Management Finance 1 (2): 56-65. https://doi.org/10.62017/finance.v1i2.18.