Source of unexplained difference between a security holding and its cost basis
In checking my Quicken entries against account statements I have an unexplained difference between the current value of the holding and its cost basis. Everything was fine up until my August statement. All values compared through the end of July 2021. August only had 4 transaction with this security. The values related to these four entries were checked;they agreed with the account statement. They were entered correctly. On the off chance that the values looked OK but were internally incorrect, I deleted all four entries and re-entered them. No change. Do things like this happen with Quicken, particularly as the data file for Quicken becomes larger. It's not apparent that this discrepancy can be overcome.