Yuliani, P. et al. 2025. 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. 4, 10 (Jun. 2025), 1348 – 1356. DOI:https://doi.org/10.59141/jrssem.v4i10.842.