finmarketpy (formerly pythalesians)

finmarketpy is a Python based library that enables you to analyze market data and also to backtest trading strategies using a simple to use API, which has prebuilt templates for you to define backtest. Included in the library

Prebuilt templates for backtesting trading strategies
Display historical returns for trading strategies
Investigate seasonality of trading strategies
Conduct market event studies around data events
In built calculator for risk weighting using volatility targeting
Written in object oriented way to make code more reusable

Contributors for the project are very much welcome, see below!

Merging with pythalesians

I had previously written the open source PyThalesians financial library (which has been merged with this - so can focus on maintaining one set of libraries). This new finmarketpy library has

Similar functionality to the trading part of pythalesians
Rewritten the API to make it much cleaner and easier to use, as well as having many new features.
finmarketpy requires the libraries, which I've written chartpy (for charts) and findatapy (for loading market data) to function
By splitting up into smaller more specialised libraries, it should make it easier for contributors
Using findatapy, you can download market data easily from Bloomberg, Quandl, Yahoo etc
Using chartpy, you can choose to have results displayed in matplotlib, plotly or bokeh by changing single keyword!

Points to note:

Please bear in mind at present finmarketpy is under continual development. The API is heavily documented, but we are looking to add more general documentation.
Uses Apache 2.0 licence

Gallery

Calculate the cumulative returns of a trading strategy historically (see finmarketpy_examples/tradingmodelfxtrend_example.py)

Plot the leverage of the strategy over time

Plot the individual trade returns

Calculate seasonality of any asset: here we show gold and FX volatility seasonality (see examples/seasonality_examples.py)

Calculate event study around events for asset (see examples/events_examples.py)

Requirements

Major requirements

Required: Python 3.8
Required: pandas 1.2.3, numpy etc.
Required: findatapy for downloading market data (https://github.com/cuemacro/findatapy)
Required: chartpy for funky interactive plots (https://github.com/cuemacro/chartpy)

Installation

For detailed installation instructions for finmarketpy and its associated Python libraries go to https://github.com/cuemacro/finmarketpy/blob/master/INSTALL.md (which includes details on how to setup your entire Python environment).

Also take a look at https://github.com/cuemacro/teaching/blob/master/pythoncourse/installation/installing_anaconda_and_pycharm.ipynb from my Python for finance workshop course, where I keep notes specifically about setting up your Anaconda environment for data science (including for findatapy/chartpy/finmarketpy), including YAML files etc.

You can install the library using the below (better to get the newest version from repo, as opposed to releases).

After installation:

Make sure you edit the marketconstants.py file (or you can create a marketcred.py file to overwrite the settings)

pip install git+https://github.com/cuemacro/finmarketpy.git

But beforehand please make sure you have already installed both chartpy, findatapy and any other dependencies. In chartpy you will need to change the chartconstants.py file (to add Plotly API key) and for findatapy, you will also need to change the dataconstants.py file to add the Quandl API (and possibly change other configuration settings there or add a datacred.py file in the util folder, alternatively you will be prompted on your first run to input the API key which will be installed). If you do pip with git you'll get the very latest commit.

pip install git+https://github.com/cuemacro/chartpy.git
pip install git+https://github.com/cuemacro/findatapy.git

However you can also pip install to get from PyPI (might be a slighter older verison from that on GitHub)

pip install chartpy
pip install findatapy

Note that if you use the option pricing/total returns you might need to get the latest FinancePy version from GitHub https://github.com/domokane/FinancePy/ as opposed to PyPI

pip install git+https://github.com/domokane/FinancePy/FinancePy.git

Binder and Jupyter - Run finmarketpy in your browser

You can run some of the Jupyter notebooks in Binder interactively in your browser to play around with finmarketpy. It might take a few minutes for the Binder instance to start. We are currently working on having more notebooks in Binder, so stay tuned!

Note that you will need to get a Quandl API key to download market data to use some of these, and you can sign up for a free account at https://www.quandl.com.

Synchronizing your fork of finmarketpy with master

I found this article useful for explaining how to update your fork to match the master changes.

Contributors

Contributors are always welcome for finmarketpy, findatapy and chartpy. If you'd like to contribute, have a look at Planned Features for areas we're looking for help on. Or if you have any ideas for improvements to the libriares please let us know too!

Sponsorship, workshops and support for Cuemacro libraries

We have spent many years writing finmarketpy and other open source libraries at Cuemacro, and we are keen to do so for many years into the future.

If you using our libraries and are interested in sponsoring Cuemacro's open source libraries, you can do so through the GitHub sponsorship page at https://github.com/sponsors/cuemacro

We also offer commercial services for our Cuemacro libraries, which include:

a 2 day Python for finance workshop, which can be taught at your firm, to teach you how to use Cuemacro's libraries
extensive commercial technical support for our libraries

If you are interested in our commercial services please contact [email protected]

All these sources of funding, whether it is sponsorship or our commercial services, help us to maintain Cuemacro's libraries, so we can improve our open source libraries for the community.

Problems with Numba and doing options pricing in finmarketpy/financepy

Underneath finmarketpy uses financepy to do option pricing. It uses Numba to speed up the computation.

You may sometimes experience Numba errors like such as Failed in nopython mode pipeline (step: nopython frontend)

One possible way to fix this is to delete the __pycache__ folders underneath wherever financepy is installed:

Eg. if you are using the py38class environment, if you've installed Anaconda in C:\Anaconda3, you might find the financepy folder at the below location

C:\Anaconda3\envs\py38\Lib\site-packages\financepy

finmarketpy examples

In finmarketpy/examples you will find several examples, including some simple trading models

Release Notes

0.11.12 - finmarketpy (26 Apr 2023)
0.11.11 - finmarketpy (07 Oct 2021)
0.11.10 - finmarketpy (06 Oct 2021)
0.11.9 - finmarketpy (01 Jun 2021)
0.11.8 - finmarketpy (25 Jan 2021)
0.11.7 - finmarketpy (20 Oct 2020)
0.11.6 - finmarketpy (02 Oct 2020)
0.11.5 - finmarketpy (24 Aug 2020)
0.11.4 - finmarketpy (06 May 2020)
0.11.3 - finmarketpy (04 Dec 2019)
0.11.1 - finmarketpy (23 Oct 2019)
0.11 - finmarketpy
First prerelease version

Coding log

finmarketpy log

26 Apr 2023
- Changed sklearn to scikit-learn dependency
05 Apr 2022
- Set FinancePy version required to 0.220 and refactored FXVolSurface for this
07 Oct 2021
- Set FinancePy version required to 0.193
23 Sep 2021
- Fixed bug in YoY plot
23 Jul 2021
- Added roll costs in backtest
30 May 2021
- Added S3 Jupyter notebook for use with findatapy
21 May 2021
- Fix bug with plotting vol target charts when vol targeting is off
12 May 2021
- Fixed bug when calculating benchmark return statistics in TradingModel with different start/finish date
04 May 2021
- Revamped Jupyter notebook for downloading market data with findatapy
28 Apr 2021
- Added signal multiplier parameter for charts
21 Apr 2021
- Format changes to TradingModel charts
15 Apr 2021
- Constant overrides now persist
13 Apr 2021
- Replaced loc with iloc in TechIndicator to remove Pandas deprecated functionality
08 Apr 2021
- Fixed EventStudy issue when start window is before time series
21 Mar 2021
- Fixed issue with EventStudy
- Refactored TradingModel when constructing weights
22 Feb 2021
- Fix bug when plotting IR of strategies
16 Feb 2021
- Added total returns in example for options indices construction
11 Feb 2021
- Refactored to use join from Calculations instead of pandas_outer_join
- Allowed backtesting by fields other than close
- Customize strike range for extracting FX vol surface
22 Jan 2021
- FX spot total returns now supports intraday data and added example
- Fixed problem with Numba implementation of FX spot total returns
17 Jan 2021
- Fix vol surface examples to work with new FXVolSurface
16 Jan 2021
- Additional work on FXOptionPricer and total returns (FXOptionCurve)
  - Speed up and deal with non-convergence of solver
  - Allow options entry on user specified dates
- Added more option examples
11 Jan 2021
- Fixed issue with OTM strikes in FXOptionPricer
10 Jan 2021
- Fixed incorrect pushing of 10d quotes on FX vol surface
- Added extra parameters for FXOptionsCurve, freezing FX implied, calendar etc.
09 Jan 2021
- Fixed dom/for rate in FX vol surface
- Fixed additive index
- Still sorting issues with total return indices for FX options
08 Jan 2021
- Added total returns for straddle (with example)
- Fixed positioning flip and expiring on day without market data on FXOptionsCurve
08 Jan 2021
- Changed FXVolSurface to fit better with newest FinancePy
- Added missing FXOptionsCurve class
07 Jan 2021
- Added FX vanilla option pricing (via FinancePy)
- Calculate total return indices for FX vanilla options
26 Dec 2020
- Refactored classes to take into account new Calendar object from findatapy
24 Dec 2020
- Added FX forwards pricer with examples
  - Interpolation of odd dates
  - Implied depo calculations
- Added FX forwards total return calculator with examples
- Rewrote FX spot indices construction to use Numba
20 Dec 2020
- Changed typo in licence at top of scripts
19 Dec 2020
- Added VolStats and examples to calculate realized vol, vol risk premium and implied vol addons
- Added FX total return calculations for FX spot positions
- Begun to add FX total return calculations for FX forwards (incomplete)
- Adapted FX vol code to latest version of FinancePy (note, may need to download via GitHub instead of PyPI)
- Also calculated implied PDF for FX vol surface using FinancePy underneath
04 Dec 2020
- Fix imports in FX vol interpolation
02 Dec 2020
- Added FX vol surface interpolation (using FinancePy library underneath) + animated example
12 Nov 2020
- Added Binder, so can run notebooks interactively
- Edited backtest_example Jupyter notebook with more description
11 Nov 2020
- Added cumulative additive index flag for backtests
20 Oct 2020
- Fixed missing GBP depo tickers
- Fixed startup on newer MacOS
02 Oct 2020
- Fixed vol surface calculation
24 Aug 2020
- Replaced .ix to work with later versions of pandas
07 May 2020
- Improved QuickChart, adding additional labels, fixing example
06 May 2020
- Added QuickChart for one line download of market data and plotting
- Added feature to resample returns
- Allow more custom parameters in backtest
17 Dec 2019
- Added link for Python for finance workshop installation notes for Anaconda
04 Dec 2019
- Making blosc optional in BacktestEngine
14 Nov 2019
- Added network plot
02 Nov 2019
- Fixed bug running on Mac
- Updated installation instructions
- Added tests for technical indicators
- Added backtestcomparison.py
29 Mar 2019 - Added variable transaction costs
14 Nov 2018 - Fixed contract bug in backtest_example
18 Sep 2018 - Fixed bug on writing PnL CSV
17 Sep 2018 - Added rounding for trade size display (otherwise trades can be ungrounded because of rounding errors)
11 Jun 2018 - Fixed bug with single threaded TradeAnalysis
29 May 2018 - Added port
25 Apr 2018
- Added (some) parallel features for backtesting and sensitivity analysis (works better in Linux)
- Added different transaction costs by assets
- Fixed backtesting examples so work with "run_in_parallel" keyword and can customise BacktestRequest more
18 Apr 2018 - Fix bug with trade notional sizes
06 Apr 2018 - Added function to measure freq of trade notional sizes
29 Mar 2018 - Fix bug when dumping CSV of P&L
15 Mar 2018 - Added caching for event data
26 Feb 2018 - Added solution for replacing parameters under tech_params (in tradeanalysis.py).
30 Jan 2018 - Fix bug on backtest.example.py
25 Jan 2018 - Fix bug on class
04 Jan 2018 - Bug fix for Cred override of constants
16 Sep 2017 - Adding to planned features list
10 Jul 2017 - Added install instructions for conda
03 Jul 2017 - Fixed dependency on seasonal library
26 Jun 2017 - BacktestEngine can now handle weighted sum style portfolios
23 Jun 2017 - Downloads observation date for economic data (EventStudy)
21 Jun 2017 - Added trend following example using Bloomberg total return data
07 Jun 2017 - Added output of IR/Rets in sensitivity analysis (TradeAnalysis)
22 May 2017 - Output returns of strategy (to CSV file)
03 May 2017 - Added more planned features
13 Apr 2017 - Changed finish date on FX trend following model
12 Mar 2017 - Added FX vol surface animation example
25 Feb 2017 - Added signal delay parameter
24 Feb 2017 - Refactored backtesting classes so have consistent naming
21 Feb 2017 - Refactored BacktestEngine to use SwimPool
20 Feb 2017 - Extra install instructions
14 Feb 2017 - Added Planned Features page
08 Feb 2017 - Added SHOW_CHARTS parameter for TradingModel and made SMA work with old pandas
05 Feb 2017 - Added more installation notes and fixed Excel output in TradeAnalysis if notional not specified
02 Feb 2017 - Further changes to constraints on max long/shorts (with refactoring)
01 Feb 2017 - Added constraints for max longs/shorts and plots in BacktestEngine
25 Jan 2017 - Additional work on stops/take profit with multiple assets & plotting bug fixes for TradeAnalysis
24 Jan 2017 - Fixing issues around stops/take profits and adding fields in TechParams
19 Jan 2017 - Change location of examples in project
16 Jan 2017 - Added method in BacktestEngine for debugging of P&L (dumps table with signals/assets/returns)
12 Jan 2017 - Added detailed installation notes
11 Jan 2017 - Rewrote large number of comments, added ATR calculation and basic stop loss/take profit functionality
07 Jan 2017 - Now outputs position sizes scaled by notional & by user defined contract sizes
06 Jan 2017 - Added user defined weightings for strategies & general bug fixes
04 Jan 2017 - Added a period shift parameter for calculating leverage (in RiskEngine)
30 Nov 2016 - Added seasonality example for NFP
24 Nov 2016 - Added seasonality example for gasoline
17 Nov 2016 - Changed source to ChartConstants default for TradingModel
14 Oct 2016 - Fixed arctic references in MarketConstants
13 Oct 2016 - Fixed IR plotting for BacktestEngine, added YoY metric plots
11 Oct 2016 - Added to TradeAnalysis another way to plot return statistics for a portfolio
10 Oct 2016 - Added returns_example to show how to use PyFolio via finmarketpy, added dataframe input for TradeAnalysis, fixed typo in readme
07 Oct 2016 - Add .idea to .gitignore
06 Oct 2016 - Split out plotting of no of trades and position proportion
22 Sep 2016 - Fixed sorting of columns when signal plotting
21 Sep 2016 - Allow plotting of multiple signal days
15 Sep 2016 - Merged finmarketpy and pythalesians fully, released version 0.11
12 Sep 2016 - Fixed issue with TradeAnalysis (method names)
02 Sep 2016 - Fixed issue with external dataframe eco events, added event study example
01 Sep 2016 - Added seasonality example for FX vol
22 Aug 2016 - Fixed boot issue and added credentials
17 Aug 2016 - Uploaded first code

pythalesians log

03 Aug 2016 - Fixed missing conf files
02 Aug 2016 - Changed default Plotly background color and fixed constants issue with AdapterTemplate
01 Aug 2016 - Renamed pythalesians_graphics as chartesians (preparing eventual spinout)
29 Jul 2016 - Created Jupyter notebook plot_market_data for plotting with multiple libraries, also fixed Bokeh sizing issue, refactored library, spinning out chart functionality into pythalesians_graphics
28 Jul 2016 - Fixed issue with multiple fields returned by Quandl, added Quandl downloading example
26 Jul 2016 - Added more support for Plotly charts, added surface vol Plotly example
21 Jul 2016 - Refactor StrategyTemplate graph plotting functions
20 Jul 2016 - Return of figure handle for AdapterPyThalesians
08 Jun 2016 - Fix kurtosis issue, refactored vol scaling in CashBasktest, added resample wrapper in TimeSeriesFilter
03 Jun 2016 - Speed up CashBacktest (construct_strategy method)
02 Jun 2016 - Fixed missing StrategyTemplate file in installation, added auto-detection of path to simplify installation and added methods for converting between pandas and bcolz
31 May 2016 - Got rid of deprecated Pandas methods in TechIndicator
27 May 2016 - Added ability to plot strategy signal at point in time
19 May 2016 - Updated Quandl wrapper to use new Quandl API
02 May 2016 - Tidied up BacktestRequest, added SPX seasonality example
28 Apr 2016 - Updated cashbacktest (for Pandas 0.18)
21 Apr 2016 - Got rid of deprecated Pandas methods in EventStudy
18 Apr 2016 - Fixed some incompatibility issues with Pandas 0.18
06 Apr 2016 - Added more trade statistics output
01 Apr 2016 - Speeded up joining operations, noticeable when fetching high freq time series
21 Mar 2016 - Added IPython notebook to demonstrate how to backtest simple FX trend following trading strategy
19 Mar 2016 - Tested with Python 3.5 64 bit (Anaconda 2.5 on Windows 10)
17 Mar 2016 - Refactored some of graph/time series functions and StrategyTemplate
11 Mar 2016 - Fixed warnings in matplotlib 1.5
09 Mar 2016 - Added more TradeAnalysis features (for sensitivity analysis of trading strategies)
01 Mar 2016 - Added IPython notebook to demonstrate how to download market data and plot
27 Feb 2016 - Fixed total returns FX example
20 Feb 2016 - Added more parameters for StrategyTemplate
13 Feb 2016 - Edited time series filter methods
11 Feb 2016 - Added example to plot BoJ interventions against USDJPY spot
10 Feb 2016 - Updated project description
01 Feb 2016 - Added LightEventsFactory to make it easier to deal with econ data events (stored as HDF5 files)
20 Jan 2016 - Added kurtosis measure for trading strategy results, fixed Quandl issue
19 Jan 2016 - Changed examples folder name
15 Jan 2016 - Added risk on/off FX correlation example
05 Jan 2016 - Added total return (spot) indices construction for FX and example
26 Dec 2015 - Fixed problem with econ data downloaders
24 Dec 2015 - Added datafactory templates for creating custom indicators
19 Dec 2015 - Refactored Dukascopy downloader
10 Dec 2015 - Various bug fixes
22 Nov 2015 - Increased vol targeting features for doing backtesting
07 Nov 2015 - Added feature to download tick data from Bloomberg (with example)
05 Nov 2015 - Added intraday event study class (and example)
02 Nov 2015 - Added easy wrapper for doing rolling correlations (and example)
28 Oct 2015 - Added more sensitivity analysis for trading strategies
26 Oct 2015 - Various bug fixes for Bloomberg Open API downloader
14 Oct 2015 - Added capability to do parallel downloading of market data (thread/multiprocessing library), with an example for benchmarking and bug fixes for Bloomberg downloader
25 Sep 2015 - Refactored examples into different folders / more seasonality examples
19 Sep 2015 - Added support for Plotly choropleth map plots & easy downloading of economic data via FRED/Bloomberg/Quandl
12 Sep 2015 - Added basic support for PyFolio for statistical analysis of strategies
04 Sep 2015 - Added StrategyTemplate for backtesting (with example) & bug fixes
21 Aug 2015 - Added stacked charts (with matplotlib & bokeh) & several bug fixes
15 Aug 2015 - Added bar charts (with matplotlib & bokeh) & added more time series filter functions
09 Aug 2015 - Improved Bokeh support
07 Aug 2015 - Added Plotly support (via Jorge Santos Cufflinks wrapper)
04 Aug 2015 - Added ability to download from FRED and example for downloading from FRED.
29 Jul 2015 - Added backtesting functions (including simple FX trend following strategy) and various bug fixes/comments.
24 Jul 2015 - Added functions for doing simple seasonality studies and added examples.
17 Jul 2015 - Created example to show how to use technical indicators.
13 Jul 2015 - Changed location of conf, renamed examples folder to pythalesians_examples. Can now be installed using setup.py.
10 Jul 2015 - Added ability to download Dukascopy FX tick data (data is free for personal use - check Dukascopy terms & conditions). Note that past month of data is generally not made available by Dukascopy

End of note

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