They are probably very busy trading oil too http://fuelfix.com/blog/2015/04/05/louisiana-oil-port-made-for-import-rents-domestic-storage/ ....Though LOOP’s contracts are much cheaper, Busch said there are some drawbacks. He said one is that the contracts require the oil actually be delivered on a set delivery date. The oil can’t be traded out with offsetting contracts. Moreover, oil most be moved by barge from a port to LOOP. All of that costs money, Busch said. Then the trader has to find a buyer for the actual oil and sell it, and securing a profitable price is not a sure thing.