ANALISIS PORTOFOLIO SAHAM SEKTORAL DI BEI MENGGUNAKAN MODEL MARKOWITZ: STUDI KASUS EMITEN LQ45 TAHUN 2021–2024. Jurnal Intelek Dan Cendikiawan Nusantara, [S. l.], v. 2, n. 3, p. 4235–4242, 2025. Disponível em: https://jicnusantara.com/index.php/jicn/article/view/4387. Acesso em: 24 aug. 2026.