Yulianto, Y. and Octafilia, Y. 2025. Determinants of Stock Returns: The Role of Profitability, Valuation Ratios, and Firm Size in the Jakarta Islamic Index (2016–2020). Research in Accounting Journal (RAJ) . 6, 1 (Apr. 2025), 11–24. DOI:https://doi.org/10.37385/raj.v6i1.10458.