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# QuantLib: the free/open-source library for quantitative finance
[](https://github.com/lballabio/QuantLib/releases/latest)
[](https://github.com/lballabio/QuantLib/blob/master/LICENSE.TXT)
[](https://doi.org/10.5281/zenodo.1440997)
[](https://github.com/lballabio/QuantLib/blob/master/CONTRIBUTING.md)
[](https://github.com/lballabio/QuantLib/actions/workflows/linux.yml)
[](https://github.com/lballabio/QuantLib/actions/workflows/msvc.yml)
[](https://github.com/lballabio/QuantLib/actions/workflows/macos.yml)
[](https://github.com/lballabio/QuantLib/actions/workflows/cmake.yml)
[](https://www.codacy.com/gh/lballabio/QuantLib/dashboard)
[](https://coveralls.io/github/lballabio/QuantLib?branch=master)
---
The QuantLib project (<https://www.quantlib.org>) is aimed at providing a
comprehensive software framework for quantitative finance. QuantLib is
a free/open-source library for modeling, trading, and risk management
in real-life.
QuantLib is Non-Copylefted Free Software and OSI Certified Open Source
Software.
## Download and usage
QuantLib can be downloaded from <https://www.quantlib.org/download.shtml>;
installation instructions are available at
<https://www.quantlib.org/install.shtml> for most platforms.
Documentation for the usage and the design of the QuantLib library is
available from <https://www.quantlib.org/docs.shtml>.
A list of changes for each past versions of the library can be
browsed at <https://www.quantlib.org/reference/history.html>.
## Questions and feedback
The preferred channel for questions (and the one with the largest
audience) is the quantlib-users mailing list. Instructions for
subscribing are at <https://www.quantlib.org/mailinglists.shtml>.
Bugs can be reported as a GitHub issue at
<https://github.com/lballabio/QuantLib/issues>; if you have a patch
available, you can open a pull request instead (see "Contributing"
below).
## Contributing
Contributions are very welcome! Details are in
[CONTRIBUTING.md](https://github.com/lballabio/QuantLib/blob/master/CONTRIBUTING.md)
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