Allow data to be locked
Allow the fundamental data to be 'locked' so that new/updated data is only added and doesn't overwrite older or edited fundamental data.
AdminBetterInvesting (BetterInvesting, BetterInvesting) shared this idea
User entered data is now locked on a row-by-row basis.
We advise that all ‘non-changed’ data is kept unlocked so it is automatically updated (upon a user initiated refresh/update) in the case of a stock split.