This article talks briefly about how commodities are traded between different places. It talks about how the goods are traded for a specific price then how "many traders use commodity futures to speculate on future price movements." in which they product will be sold on the market

This article talks about how oil and how oil is becoming a very limited resource. The demand on this resource is high and has stayed that way. So because the price raised and the demand is still the same they have to supply a lot more equally everywhere.