Manap, Abdul, Yusnindar Yusnindar, Lilik Swartana Angga Buana, Saut Pane, and Mohamad Ramadhan Agung. 2025. “Financial Performance of Investment Companies Using the Treynor-Black Method: An Analysis of Risk-Adjusted Returns and Portfolio Optimization”. RIGGS: Journal of Artificial Intelligence and Digital Business 4 (2):83-90. https://doi.org/10.31004/riggs.v4i2.457.