I've just gone through the Stock Splits section of Trading with Beancount document. Based on the info there, which may be outdated, there is no way to refer to exact lots.
However, other docs do list the option to use dates in the lot spec { price, date }, similar to what ledger does. I've tried this approach in the following way:
As a result, both bean-report and fava seem to show the correct info. Fava reports the lot acquisition date to be May 1 and July 1, not September 1, when the stock split occurred.
Could someone confirm that this is correct? I'm not sure how to list the lots via command-line. Tried a few bean-report commands but did not see the date info in the report.
If this is correct, I'd like to add it to the Stock Split section of the documentation.
I need to adjust a few such records after conversion so I would like to know the best way to do this.