Wang R, Wei H, An B, Feng Z, Yao J. Commission Fee is not Enough: A Hierarchical Reinforced Framework for Portfolio Management. AAAI [Internet]. 2021 May 18 [cited 2026 May 7];35(1):626-33. Available from: https://ojs.aaai.org/index.php/AAAI/article/view/16142