Putri, Risa, and Farahiyah Sartika. “Analisis Return Dan Risk Portofolio Optimal Saham Syariah Berdasarkan Single Index Model”. Ekonomi, Keuangan, Investasi dan Syariah (EKUITAS) 5, no. 1 (August 29, 2023): 223-232. Accessed June 3, 2026. https://ejurnal.seminar-id.com/index.php/ekuitas/article/view/3946.