Rebalance

A calculator that tells you how to split your investment amongst your portfolio's assets based on your target asset allocation.

To use it, install the package and write a portfolio JSON file as described below.

Installation

pip install rebalance

Usage

rebalance portfolios/my_portfolio.json

Portfolio file format

Create a JSON file describing your portfolio:

{
  "name": "My portfolio",
  "selling_allowed": false,
  "cash": [
    {"amount": 3000.0, "currency": "USD"},
    {"amount": 200.0, "currency": "CAD"}
  ],
  "assets": [
    {"ticker": "XBB.TO", "quantity": 36, "target_allocation": 20},
    {"ticker": "XIC.TO", "quantity": 64, "target_allocation": 20},
    {"ticker": "ITOT",   "quantity": 32, "target_allocation": 36},
    {"ticker": "IEFA",   "quantity": 8,  "target_allocation": 20},
    {"ticker": "IEMG",   "quantity": 7,  "target_allocation": 4}
  ]
}

Example output

 Ticker      Ask     Quantity      Amount    Currency     Old allocation   New allocation     Target allocation
                      to buy         ($)                      (%)              (%)                 (%)
---------------------------------------------------------------------------------------------------------------
  XBB.TO    33.43       30         1002.90      CAD          17.52            19.99               20.00
  XIC.TO    24.27       27          655.29      CAD          22.61            20.01               20.00
    ITOT    69.38       10          693.80      USD          43.93            35.88               36.00
    IEFA    57.65       20         1153.00      USD           9.13            19.88               20.00
    IEMG    49.14        0            0.00      USD           6.81             4.24                4.00

Largest discrepancy between the new and the target asset allocation is 0.24 %.

Before making the above purchases, the following currency conversion is required:
    1072.88 USD to 1458.19 CAD at a rate of 1.3591.

Remaining cash:
    80.32 USD.
    0.00 CAD.