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Alphas are pivotal in providing signals for quantitative trading. The industry highly values the discovery of formulaic alphas for their interpretability and ease of analysis, compared with the expressive yet overfitting-prone black-box…

Computational Finance · Quantitative Finance 2024-06-27 Feng Xu , Yan Yin , Xinyu Zhang , Tianyuan Liu , Shengyi Jiang , Zongzhang Zhang

Modern quantitative trading increasingly relies on systematic models to extract predictive signals from large-scale financial data, where alpha factor discovery plays a central role in transforming market observations into tradable signals.…

Computational Engineering, Finance, and Science · Computer Science 2026-05-18 Lingzhe Zhang , Tong Jia , Yunpeng Zhai , Zixuan Xie , Chiming Duan , Minghua He , Philip S. Yu , Ying Li

This paper introduces a reinforcement learning framework that employs Proximal Policy Optimization (PPO) to dynamically optimize the weights of multiple large language model (LLM)-generated formulaic alphas for stock trading strategies.…

Computational Engineering, Finance, and Science · Computer Science 2026-03-05 Qizhao Chen , Hiroaki Kawashima

Discovering effective predictive signals, or "alphas," from financial data with high dimensionality and extremely low signal-to-noise ratio remains a difficult open problem. Despite progress in deep learning, genetic programming, and, more…

Computation and Language · Computer Science 2026-04-21 Fengyuan Liu , Yi Huang , Sichun Luo , Yuqi Wang , Yazheng Yang , Xinye Li , Zefa Hu , Junlan Feng , Qi Liu

In the trading process, financial signals often imply the time to buy and sell assets to generate excess returns compared to a benchmark (e.g., an index). Alpha is the portion of an asset's return that is not explained by exposure to this…

Computational Engineering, Finance, and Science · Computer Science 2024-10-25 Yining Wang , Jinman Zhao , Yuri Lawryshyn

Automated alpha discovery is difficult because the search space of formulaic factors is combinatorial, the signal-to-noise ratio in daily equity data is low, and unconstrained program generation is operationally unsafe. We present Hubble,…

Artificial Intelligence · Computer Science 2026-04-15 Runze Shi , Shengyu Yan , Yuecheng Cai , Chengxi Lv

Alpha mining, a critical component in quantitative investment, focuses on discovering predictive signals for future asset returns in increasingly complex financial markets. However, the pervasive issue of alpha decay, where factors lose…

Computational Engineering, Finance, and Science · Computer Science 2025-06-10 Ziyi Tang , Zechuan Chen , Jiarui Yang , Jiayao Mai , Yongsen Zheng , Keze Wang , Jinrui Chen , Liang Lin

The formulaic alphas are mathematical formulas that transform raw stock data into indicated signals. In the industry, a collection of formulaic alphas is combined to enhance modeling accuracy. Existing alpha mining only employs the neural…

Computational Finance · Quantitative Finance 2024-03-01 Tao Ren , Ruihan Zhou , Jinyang Jiang , Jiafeng Liang , Qinghao Wang , Yijie Peng

Recent developments in deep learning techniques have motivated intensive research in machine learning-aided stock trading strategies. However, since the financial market has a highly non-stationary nature hindering the application of…

Portfolio Management · Quantitative Finance 2020-12-15 Kentaro Imajo , Kentaro Minami , Katsuya Ito , Kei Nakagawa

Feature Transformation is crucial for classic machine learning that aims to generate feature combinations to enhance the performance of downstream tasks from a data-centric perspective. Current methodologies, such as manual expert-driven…

Machine Learning · Computer Science 2025-03-27 Tianqi He , Xiaohan Huang , Yi Du , Qingqing Long , Ziyue Qiao , Min Wu , Yanjie Fu , Yuanchun Zhou , Meng Xiao

There are inefficiencies in financial markets, with unexploited patterns in price, volume, and cross-sectional relationships. While many approaches use large-scale transformers, we take a domain-focused path: feed-forward and recurrent…

Portfolio Management · Quantitative Finance 2025-10-15 Sid Ghatak , Arman Khaledian , Navid Parvini , Nariman Khaledian

Quantitative investment is a fundamental financial task that highly relies on accurate stock prediction and profitable investment decision making. Despite recent advances in deep learning (DL) have shown stellar performance on capturing…

Trading and Market Microstructure · Quantitative Finance 2022-07-18 Shuo Sun , Rundong Wang , Bo An

The task of financial analysis primarily encompasses two key areas: stock trend prediction and the corresponding financial question answering. Currently, machine learning and deep learning algorithms (ML&DL) have been widely applied for…

Computation and Language · Computer Science 2024-03-20 Xiang Li , Zhenyu Li , Chen Shi , Yong Xu , Qing Du , Mingkui Tan , Jun Huang , Wei Lin

Traditional ETF stock selection methods and reinforcement learning models such as the Asynchronous Advantage Actor-Critic (A3C) often suffer from high-dimensional feature spaces and overfitting when applied to complex financial markets.…

Computational Engineering, Finance, and Science · Computer Science 2025-12-29 Yen-Ku Liu , Yun-Cheng Tsai , Samuel Yen-Chi Chen

Feature generation (FG) aims to enhance the prediction potential of original data by constructing high-order feature combinations and removing redundant features. It is a key preprocessing step for tabular scientific data to improve…

Machine Learning · Computer Science 2025-07-10 Meng Xiao , Junfeng Zhou , Yuanchun Zhou

Deep learning has proven to be a highly effective tool for a wide range of applications, significantly when leveraging the power of multi-loss functions to optimize performance on multiple criteria simultaneously. However, optimal selection…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Amin Golnari , Mostafa Diba

Sparse portfolio optimization is a fundamental yet challenging problem in quantitative finance, since traditional approaches heavily relying on historical return statistics and static objectives can hardly adapt to dynamic market regimes.…

Portfolio Management · Quantitative Finance 2025-07-24 Haochen Luo , Yuan Zhang , Chen Liu

Accurate forecasting in financial markets requires integrating diverse data sources, from historical prices to macroeconomic indicators and financial news. However, existing models often fail to align these modalities effectively, limiting…

Machine Learning · Computer Science 2025-11-04 Yunhua Pei , John Cartlidge , Anandadeep Mandal , Daniel Gold , Enrique Marcilio , Riccardo Mazzon

Mixtures of factor analysers (MFA) models represent a popular tool for finding structure in data, particularly high-dimensional data. While in most applications the number of clusters, and especially the number of latent factors within…

Methodology · Statistics 2023-07-17 Margarita Grushanina , Sylvia Frühwirth-Schnatter

Molecular optimization seeks to improve a molecule through small structural edits while preserving similarity to the starting compound. Recent language-model approaches typically treat this task as prompt-conditioned sequence generation.…

Machine Learning · Computer Science 2026-05-12 Qingchuan Zhang , He Cao , Hao Li , Yanjun Shao , Zhiyuan Liu , Shihang Wang , Shufang Xie , Shenghua Gao , Xinwu Ye