Zahra Rohadatul Aisylah, Ferdiansyah Saputra, Surya Lesmana, A., & Satria Ganefi, H. (2026). MEAN-VARIANCE PORTFOLIO OPTIMIZATION FOR EMDE AND MTDL STOCKS: A MARKOWITZ APPROACH. Digital Business and Entrepreneurship Journal, 4(2), 89–99. https://doi.org/10.25134/digibe.v4i2.609