Bagus Yosia Wiryakusuma, I.G. 2020. Analysis of Optimal Portfolio Performance Comparison on Companies Listed in LQ45 Index and Companies Unregistered in LQ45 Index. KnE Social Sciences. 4, 3 (Feb. 2020), 250–261. DOI:https://doi.org/10.18502/kss.v4i3.6410.