Hi Mark,
I would find interesting to have a quote server <Null>, <None>, or any other name, that leads to nowhere and don't download any prices but don't generate any error messages when "Retrieve price" is ticked with any symbol code. And the same for historical quote server.
I sometimes order my investments in the Portfolio Editor by the column (historical) Quote Server, for some maintenance, and currently all the cash accounts and others investments that don't retrieve prices appear as "Default Server". I would find useful if we could identify in this column the investments for which a quote server never has to be activated.
Moreover, this would allow to do some mistakes with the command Files Operations > Hide Sold Investments, activating "Retrieve price" for some unwanted investments (cash account, or some others..) without consequences.