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empyrical computes performance and risk statistics commonly used in quantitative finance

Project description

PyPI Wheels CI Tests


Common financial risk metrics in Python.


empyrical requires Python 3.7+. You can install it using pip:

pip install empyrical-reloaded

or conda:

conda install -c ml4t empyrical-reloaded

empyrical requires and installs the following packages while executing the above commands:

  • numpy>=1.9.2
  • pandas>=1.0.0
  • scipy>=0.15.1
  • pandas-datareader>=0.4
  • yfinance>=0.1.55


Simple Statistics

import numpy as np
from empyrical import max_drawdown, alpha_beta

returns = np.array([.01, .02, .03, -.4, -.06, -.02])
benchmark_returns = np.array([.02, .02, .03, -.35, -.05, -.01])

# calculate the max drawdown

# calculate alpha and beta
alpha, beta = alpha_beta(returns, benchmark_returns)

Rolling Measures

import numpy as np
from empyrical import roll_max_drawdown

returns = np.array([.01, .02, .03, -.4, -.06, -.02])

# calculate the rolling max drawdown
roll_max_drawdown(returns, window=3)

Pandas Support

import pandas as pd
from empyrical import roll_up_capture, capture

returns = pd.Series([.01, .02, .03, -.4, -.06, -.02])

# calculate a capture ratio

# calculate capture for up markets on a rolling 60 day basis
roll_up_capture(returns, window=60)


Please open an issue for support.


Please contribute using Github Flow. Create a branch, add commits, and open a pull request.


  • install requirements
    • "nose>=1.3.7",
    • "parameterized>=0.6.1"
nosetests empyrical.tests

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Files for empyrical-reloaded, version 0.5.7
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