鉴于Quantopian已经倒闭,不再维护Alphalens,很有必要fork一份,自己修复后续bugs和做一些新的特性开发。
目前,已经做出的修改和增强:
1、修复了bug:['Index' object has no attribute 'get_values ](quantopian#379)
2、不知为何py3.7下,plot.show()出来的结果完全布局乱掉,而且,我本身也不喜欢这种弹出框,因此改为了直接输出到当前debug目录中, ,之前作者是plt.show()出来的图片有些过度留白,这个问题依然存在,暂时不修复了。
pip install git+https://github.com/piginzoo/alphalens.git
Alphalens is a Python Library for performance analysis of predictive (alpha) stock factors. Alphalens works great with the Zipline open source backtesting library, and Pyfolio which provides performance and risk analysis of financial portfolios. You can try Alphalens at Quantopian -- a free, community-centered, hosted platform for researching and testing alpha ideas. Quantopian also offers a fully managed service for professionals that includes Zipline, Alphalens, Pyfolio, FactSet data, and more.
The main function of Alphalens is to surface the most relevant statistics and plots about an alpha factor, including:
- Returns Analysis
- Information Coefficient Analysis
- Turnover Analysis
- Grouped Analysis
With a signal and pricing data creating a factor "tear sheet" is a two step process:
import alphalens
# Ingest and format data
factor_data = alphalens.utils.get_clean_factor_and_forward_returns(my_factor,
pricing,
quantiles=5,
groupby=ticker_sector,
groupby_labels=sector_names)
# Run analysis
alphalens.tears.create_full_tear_sheet(factor_data)
Check out the example notebooks for more on how to read and use the factor tear sheet. A good starting point could be this
Install with pip:
pip install alphalens
Install with conda:
conda install -c conda-forge alphalens
Install from the master branch of Alphalens repository (development code):
pip install git+https://github.com/quantopian/alphalens
Alphalens depends on:
A good way to get started is to run the examples in a Jupyter notebook.
To get set up with an example, you can:
Run a Jupyter notebook server via:
jupyter notebook
From the notebook list page(usually found at
http://localhost:8888/
), navigate over to the examples directory,
and open any file with a .ipynb extension.
Execute the code in a notebook cell by clicking on it and hitting Shift+Enter.
If you find a bug, feel free to open an issue on our github tracker.
If you want to contribute, a great place to start would be the help-wanted issues.
- Andrew Campbell
- James Christopher
- Thomas Wiecki
- Jonathan Larkin
- Jessica Stauth (jstauth@quantopian.com)
- Taso Petridis
For a full list of contributors see the contributors page.
Example factor courtesy of ExtractAlpha