I have just created a comparative chart of all traded wheats in the world( same currency, same quantity ) and it seems australian wheat( NSW on Sydney futures exchange ) is quite expensive compared to the rest... Does it make sense? Do you know the reason?
I think there is no volume on NSW wheat. There is some on the other australian wheat.
Otherwise, you can have a big difference between wheat future prices because of both the FOB basis and the quality. For instance, CBOT wheat has such an enormous basis to wheat FOB gulf compared to Euronext wheat which is really close to its FOB (5 €/t).