RIDHO JATMIKO UTAMA; BEKMAN SIAGIAN. OPTIMAL STOCK PORTFOLIO USING SINGLE INDEX MODEL (Case Study: 50 Biggest Market Capitalization listed on the Indonesia Stock Exchange for the Period January 2023 – December 2023). International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS), [S. l.], v. 5, n. 1, p. 327–342, 2025. DOI: 10.54443/ijebas.v5i1.2490. Disponível em: https://radjapublika.com/index.php/IJEBAS/article/view/2490. Acesso em: 22 apr. 2025.