How are there 12 kinds of crude oil in the United States?
Are you saying that the United States crude oil 01, the United States crude oil, 02, the United States crude oil has been to the United States, "crude oil" of 12? "
This is not the 12, it is 12 months, from January to December, every month there is a contract.Every month a contract expires. Is the delivery date.
Not twelve, only the two, standard and mini contracts, each contract has 6 sub contracts,,,
