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In the field of quantitative trading, it is common practice to transform raw historical stock data into indicative signals for the market trend. Such signals are called alpha factors. Alphas in formula forms are more interpretable and thus…

Statistical Finance · Quantitative Finance 2023-06-23 Shuo Yu , Hongyan Xue , Xiang Ao , Feiyang Pan , Jia He , Dandan Tu , Qing He

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

The multi-factor model is a widely used model in quantitative investment. The success of a multi-factor model is largely determined by the effectiveness of the alpha factors used in the model. This paper proposes a new evolutionary…

Computational Finance · Quantitative Finance 2020-04-07 Tianping Zhang , Yuanqi Li , Yifei Jin , Jian Li

The complexity of financial data, characterized by its variability and low signal-to-noise ratio, necessitates advanced methods in quantitative investment that prioritize both performance and interpretability.Transitioning from early manual…

Computational Finance · Quantitative Finance 2024-12-13 Hao Shi , Weili Song , Xinting Zhang , Jiahe Shi , Cuicui Luo , Xiang Ao , Hamid Arian , Luis Seco

Alpha factor mining is a fundamental task in quantitative trading, aimed at discovering interpretable signals that can predict asset returns beyond systematic market risk. While traditional methods rely on manual formula design or heuristic…

Computational Engineering, Finance, and Science · Computer Science 2025-10-22 Lang Cao

Alpha factor mining aims to discover investment signals from the historical financial market data, which can be used to predict asset returns and gain excess profits. Powerful deep learning methods for alpha factor mining lack…

Computational Finance · Quantitative Finance 2025-06-18 Junjie Zhao , Chengxi Zhang , Min Qin , Peng Yang

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

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

Reinforcement learning (RL) has successfully automated the complex process of mining formulaic alpha factors, for creating interpretable and profitable investment strategies. However, existing methods are hampered by the sparse rewards…

Machine Learning · Computer Science 2025-07-29 Junjie Zhao , Chengxi Zhang , Chenkai Wang , Peng Yang

The inherent volatility and dynamic fluctuations within the financial stock market underscore the necessity for investors to employ a comprehensive and reliable approach that integrates risk management strategies, market trends, and the…

Trading and Market Microstructure · Quantitative Finance 2024-11-13 Alhassan S. Yasin , Prabdeep S. Gill

Alphas are stock prediction models capturing trading signals in a stock market. A set of effective alphas can generate weakly correlated high returns to diversify the risk. Existing alphas can be categorized into two classes: Formulaic…

Artificial Intelligence · Computer Science 2021-04-02 Can Cui , Wei Wang , Meihui Zhang , Gang Chen , Zhaojing Luo , Beng Chin Ooi

Alpha factor mining is pivotal in quantitative investment for identifying predictive signals from complex financial data. While traditional formulaic alpha mining relies on human expertise, contemporary automated methods, such as those…

Artificial Intelligence · Computer Science 2025-11-13 Yu Shi , Yitong Duan , Jian 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

Financial markets are noisy and non-stationary, making alpha mining highly sensitive to backtest noise and regime shifts. While recent agentic frameworks improve automation, they often lack controllable multi-round search and reliable reuse…

Statistical Finance · Quantitative Finance 2026-05-19 Jun Han , Shuo Zhang , Wei Li , Yifan Dong , Tu Hu , Yumo Zhu , Xiaomin Yu , Xin Guo , Zhaowei Liu , Kunyi Wang , Jingping Liu , Tianyi Jiang , Ruichuan An , Sen Hu , Zhi Yang , Ronghao Che , Huacan Wang

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

Reinforcement learning (RL) is a subfield of machine learning that has been used in many fields, such as robotics, gaming, and autonomous systems. There has been growing interest in using RL for quantitative trading, where the goal is to…

Trading and Market Microstructure · Quantitative Finance 2025-02-25 Soumyadip Sarkar

Formulaic alpha factor mining is a critical yet challenging task in quantitative investment, characterized by a vast search space and the need for domain-informed, interpretable signals. However, finding novel signals becomes increasingly…

Trading and Market Microstructure · Quantitative Finance 2026-02-17 Yanlong Wang , Jian Xu , Hongkang Zhang , Shao-Lun Huang , Danny Dongning Sun , Xiao-Ping Zhang

Tabular data is one of the most widely used data formats across various domains such as bioinformatics, healthcare, and marketing. As artificial intelligence moves towards a data-centric perspective, improving data quality is essential for…

With the development of artificial intelligence technology, quantitative trading systems represented by reinforcement learning have emerged in the stock trading market. The authors combined the deep Q network in reinforcement learning with…

Statistical Finance · Quantitative Finance 2021-12-01 Yizhuo Li , Peng Zhou , Fangyi Li , Xiao Yang

With the increasing power of computers and the rapid development of self-learning methodologies such as machine learning and artificial intelligence, the problem of constructing an automatic Financial Trading Systems (FTFs) becomes an…

Trading and Market Microstructure · Quantitative Finance 2019-08-29 Haoqian Li , Thomas Lau
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