Sirait, H., Hanifah, W. N. ., Anggraeni, D. ., & Christanti, S. A. . (2024). Analysis of Optimal Stock Portfolio Formation Using the Single Index Model as the Basis for Investment Decisions. Eduvest - Journal of Universal Studies, 4(12), 11560–11578. https://doi.org/10.59188/eduvest.v4i12.1805