Siti Fitriyyatul Jamilah, Dwi Eko Waluyo, and Amron Amron. 2024. “Optimizing Portfolios Using Single Index Models and Mean-Variance From the Indonesia Stock Exchange: IDX30”. International Journal Of Accounting, Management, And Economics Research 2 (2):14-30. https://doi.org/10.56696/ijamer.v2i2.132.