Ajuna, L.H., Dukalang, H. and Ardi, M. 2025. Building an optimal portfolio of Sharia-compliant stocks using the Markowitz model: A study of listed JII companies. Jurnal Ekonomi & Keuangan Islam. 11, 2 (Sep. 2025), 314–330. DOI:https://doi.org/10.20885/JEKI.vol11.iss2.art10.