I have a transaction log that only reports Date and Value, not quantity/price. Would it be possible to infer the quantity using the Asset market price at the transaction date?
Unfortunately it’s not possible, and possibly would lead to big discrepancies, as the most important bit of the transaction is quantity. Inferring quantity from market value would rather not give you the actual number, as market value at the time of transaction is mostly different than at end-of-day. It could be mostly ok if it would be rounded, and the price per share would be high - but that’s a big if.