Skip to content

Open Source Asset Pricing

Menu
  • Data
  • Code
  • FAQ
  • Signal Browser
Menu

Open Source Asset Pricing

This website provides test asset returns and signals replicated from the academic asset pricing literature. If you use the data, please cite our paper:

@article{ChenZimmermann2022,
  title={Open Source Cross-Sectional Asset Pricing},
  author={Chen, Andrew Y. and Tom Zimmermann},
  journal={Critical Finance Review},
  year={2022},
  volume={27},
  number={2},
  pages={207--264} 
}

Here is a comparison of t-statistics in published studies against our replication:

To Download Data

  • Head to the Data tab
  • Use the openassetpricing Python package (by Peng Li)
  • Use the OpenSourceAP.DownloadR R package

Authors

Andrew Y. Chen
Tom Zimmermann

News

2025-10-22: Data update (October 2025)

  • Major code update: Signals translated to Python
  • Various other minor fixes and improvements
  • Head to the data page and our repo for details

2024-10-14: Data update (October 2024)

  • Fixes lookahead bug in AnnouncementReturn
  • All other data same as August 2024 release

2024-08-22: Data update (August 2024)

  • Portfolios updated to end of 2023
  • Various minor fixes and improvements

2023-08-16: Data update (August 2023)

  • Portfolios updated to end of 2022
  • Five additional signals
  • Various minor fixes and improvements

2022-03-30: Data update (March 2022)

  • Portfolios updated to end of 2021
  • Two additional signals
  • 2×3 Fama-French factor style portfolios
The views expressed herein are those of the authors and do not necessarily reflect the position of the Board of Governors of the Federal Reserve or the Federal ReserveSystem.
This project has received support from the Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy EXC2126/139083886.
© 2025 Open Source Asset Pricing | Powered by Minimalist Blog WordPress Theme