Just noticed this welcome enhancement to trade items on the commodity trading screen.
There is now information about which economy types will produce and consume the goods. In this case gold is produced by Extraction and Refinery, though I'm fairly sure you already knew that.
This is over and above the "imported from" and "exported to" system lists that have been there for a while now. Very helpful for those players who tend to think in terms of economy type rather than a catalogue of local knowledge about systems visited.