I'm writing an application that will be showing negative numbers of units (as in shares of stock).
When showing negative numbers in currency, it's typical to display the it in parentheses, e.g.
We also need to display numbers of units of stock, but since these are not a currency, should they be displayed in parentheses, or with a minus sign? e.g.
-100? While they're not currency, they are closely related to currency.
What would be the correct way to display these negative numbers of units? Is there a standard or is it up to the company to decide?