portfolio returns reproduction

beangrow.bean

investments {
  investment {
    asset_account: "Assets:Depot1"
    cash_accounts: "Assets:Cash1"
    dividend_accounts: "Income:Dividends"
  }
  investment {
    asset_account: "Assets:Depot2"
    cash_accounts: "Assets:Cash2"
    dividend_accounts: "Income:Dividends"
  }
}

groups {
  group {
    name: "Example Investment"
    investment: "Assets:Depot1"
    investment: "Assets:Depot2"
  }
}

test.bean

2010-01-01 commodity EUR
2010-01-01 commodity FOOBAR
option "operating_currency" "EUR"

plugin "beancount.plugins.coherent_cost"
plugin "beancount.plugins.implicit_prices"
2024-05-09 custom "fava-extension" "fava_portfolio_returns" "{
  'beangrow_config': '/beans/beangrow.bean',
}"

2010-01-01 open Assets:Depot1
2010-01-01 open Income:Dividends
2010-01-01 open Assets:Cash1

2011-01-01 * "Buy some FOOBAR"
  Assets:Depot1     100.00 FOOBAR {{ 20.00 EUR }}
  Assets:Cash1   -20.00 EUR

2015-01-01 open Assets:Depot2
2015-01-01 open Assets:Cash2

2017-01-01 * "Buy more FOOBAR"
  Assets:Depot2  100.00 FOOBAR {{ 15.00 EUR }}
  Assets:Cash2   -15.00 EUR

2018-01-01 * "Move depots"
  Assets:Depot1 -100.00 FOOBAR {{ 20.00 EUR, 2011-01-01 }}
  Assets:Depot2  100.00 FOOBAR {{ 20.00 EUR, 2011-01-01 }}

2018-01-01 * "Move debt"
  Assets:Cash1  20.00 EUR
  Assets:Cash2  -20.00 EUR

2019-01-01 close Assets:Depot1
2019-01-01 close Assets:Cash2