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Returns calculations on portfolios in Beancount Resources

Project description

Compute Returns

This directory contains code which computes investment returns on a variety of assets, as recorded by Beancount, fed directly from a Beancount file.

See this document for details: https://docs.google.com/document/d/1nPsMIunLnDvdsg6TSsd0PZb7jngojNpFlqnaX36WRp8/

Scripts

There are three related scripts:

  • configure.py: This attempts to automatically infer and generate configuration to compute returns from an existing Beancount ledger.

  • compute_returns.py: This extracts data for each of the investments defined in the configuration and computes the returns and generates output for each requested returns report.

  • download_prices.py: The compute_returns.py script outputs a list of missing (or inadequately dated) price directives to properly do its job as a side-product. This script can read that file and fetch those missing dates, which you can insert in your ledger and then rerun compute_returns.py for a more precise calculation.

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