KUSUMA, Deni Wahyu; TRI SETYORINI, Christina; ROKHAYATI, Hijroh. Optimal Portfolio Analysis Using Single index Model In combination with Stock Index: Indonesia Stock Exchange. Ratio : Reviu Akuntansi Kontemporer Indonesia, [S. l.], v. 5, n. 2, p. 80–89, 2024. DOI: 10.30595/ratio.v5i2.21702. Disponível em: http://jurnalnasional.ump.ac.id/index.php/REVIU/article/view/21702. Acesso em: 6 jul. 2026.