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Fitriani Rahim, Naura Wafiyah, Muhammad Akram Zaki Irfan, A. Nur Habibie Jannah and Reshki 2025. Analysis Of Optimal Portfolio Formation Using A Model Markowitz On LQ-45 Stocks. Journal of Studies in Academic, Humanities, Research, and Innovation. 2, 2 (Dec. 2025), 364–372. DOI:https://doi.org/10.71305/sahri.v2i2.908.