Pujianti S, Perdana H, Satyahadewi N. CONSTRUCTING AN OPTIMAL PORTFOLIO USING CLUSTERING LARGE APPLICATION AND VALUE AT RISK ANALYSIS FOR IDX80 STOCKS. BAREKENG: J. Math. & App. [Internet]. 8Apr.2026 [cited 9Apr.2026];20(3):1855-68. Available from: https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/20399