SUDIYONO, Widhiyo. RISK AND RETURN MANAGEMENT OF SHARIA STOCKS IN JAKARTA ISLAMIC INDEX FOR THE PERIOD OF 2009 – 2019 USING MARKOWITZ PORTOFOLIO MANAGEMENT. International Journal of Economics, Business and Accounting Research (IJEBAR), [S. l.], v. 5, n. 1, p. 63–79, 2021. DOI: 10.29040/ijebar.v5i1.1699. Disponível em: https://jurnal.stie-aas.ac.id/index.php/IJEBAR/article/view/1699. Acesso em: 12 jul. 2025.