[1]
Ningsih, C. and Yunianingsih, P. 2026. Optimal Portfolio Analysis Using the Markowitz Model and Single Index Model on Jakarta Islamic Index (JII) Stocks: Historical Data 2022–2025. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE). 9, 1 (Apr. 2026), 9810-9831. DOI:https://doi.org/10.31538/iijse.v9i1.9567.