RAHAYU, W. .; HARIYANTO, W. . Analysis of Portfolio Expected Returns as a Material Consideration for Investors in Choosing Investments in the Pandemic Period (Formation of Optimal Portfolios Using the Black Litterman Model on Hang Seng Stocks for the 2017-2019 Period): Analisis Penilaian Expected Return Portofolio Sebagai Bahan Pertimbangan Investor dalam Memilih Investasi di Masa Pandemi (Pembentukan Portofolio Optimal Dengan Model Black Litterman pada Saham Hang Seng Periode 2017-2019). Academia Open, [S. l.], v. 5, p. 10.21070/acopen.5.2021.2149, 2021. DOI: 10.21070/acopen.5.2021.2149. Disponível em: https://acopen.umsida.ac.id/index.php/acopen/article/view/2149. Acesso em: 10 sep. 2025.