YULIANI, Poppy; PAMUNGKAS, Bagus; ALBART, Nicko. Portfolio Efficiency Analysis of JAPFA and Indofood CBP Using the Efficient Frontier Approach: Implications for Food Sector Policy. Journal Research of Social Science, Economics, and Management, [S. l.], v. 4, n. 10, p. 1348 – 1356, 2025. DOI: 10.59141/jrssem.v4i10.842. Disponível em: https://jrssem.publikasiindonesia.id/index.php/jrssem/article/view/842. Acesso em: 5 dec. 2025.