I guess what you're referring to is what we call the Midwest premium.
Basically, Mr. Chair, the price of aluminum in a market like North America is related to two notions. One is the world price of the commodity that is set at the London Metal Exchange, the LME, on a daily basis. It's a commodity price for all the world.
Depending on which region you're sourcing your metal from—North America, for example—you pay an additional cost, a regional premium, which is basically the logistical cost of bringing in the metal to the customer at a given point in time. It factors in a whole series of things: the ocean cost, the transborder cost, the payload cost and the duty cost.
The Midwest premium is not something that anybody controls. It's a market arbitrage that is done through documenting the most recent sales on the market, and it's handled by a group called Platts Aluminum in the U.S. They survey the deals that have been made through the day and they publish the last price paid. That's how the market adjusts on the regional demand on an ongoing basis. We don't have anything to do with that. It just happens.