Rahmat Budi Santoso, Erawati Kartika, & Ika Listyawati . (2023). Portfolio Diversification Opportunities On The Asean 5 Stock Market And Sectoral Stock Indexes On The Indonesian Stock Exchange. International Conference On Digital Advanced Tourism Management And Technology, 1(1), 155–165. https://doi.org/10.56910/ictmt.v1i1.59