Stock amortization

[Leo Melo]

Hi!

I'm trying to input a fund amortization on beancount.

I tryed this:

2019-12-31 * "Buy 208 SPTW11"

  Assets:Investiments:Broker:SPTW11   208 SPTW11 {{14301.32 USD}}

  Assets:Investiments:Broker:accout

  

2020-07-01 * "Amortization SPTW11"

  Assets:Investiments:Boker:SPTW11  -0.0 SPTW11 {{669.76 USD}}

  Assets:Investiments:Broker:account

But beancount does not like the zero amount for the units. I also tried "0 SPTW11 {{-669.76 USD}} and it does not work. I need to decrease the USD balance without altering the units amount. How can I do it in a proper way? I use fava to see my balances.

Thank you all in advance!

[Ben Blount]

Hey Leo,

I'm not familiar with why a fund would so alter its cost basis, so I can't comment on whether adjusting the basis makes sense. But to do what you asked to:

Postings are adding or subtracting from an existing position. So adding or removing 0 units doesn't make sense.

Try a transaction which removes the old lot, and adds the new one like so:

2020-07-01 * "Amortization SPTW11"

  Assets:Investiments:Broker:SPTW11  -208 SPTW11 {2019-12-31}  # select the lot however you want (by cost, by date, or by label)

  Assets:Investiments:Broker:SPTW11  208 SPTW11 {{669.76 USD}}

  Income:Investment:RealizedPnL:Broker:SPTW11   # note that all transactions must balance to 0. This posting would contain the 14301.32 - 669.76 difference in value. Post it to a different account if Income:PnL is wrong.

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