Currencies vs. bookable commodities

[nug get]

Hi all
how does beancount differentiate between commodities where it keeps track of lots (shares) and those where it does not (currencies)?

For example, I have two commodities USD and VTI (neither is the ledger base currency).

Both are introduced the same way

1970-01-01 commodity USD

    name: "US Dollar"

  price: "CHF:yahoo/^CHFUSD=X"

1970-01-01 commodity VTI

    name: "VTI"

    price: "USD:yahoo/VTI"

accounts are opened the same way

1970-01-01 open Assets:Invest:IB:VTI     VTI

1970-01-01 open Assets:Invest:IB:USD     USD

but still beancount keeps track of VTI lots, but not of USD lots.

Where is the difference between them introduced? How can I control it?

Thanks!

Best,

Nugget

[Martin Blais]

The answer will be surprising: it doesn't.

If you insert a commodity with a cost basis it is stored with the lot. If it doesn't have a cost basis the cost is a null value. You can think of that as a special lot with "no basis basis".

This may need to be revised to be less flexible following the updated booking rules design (the one I wrote a doc about, that supports futures and a simplified and more intuitive reduction syntax, the one that I'll probably have time to implement in 2050 or so)

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