I read the energy bulletin article. The only point that it convincingly makes is that a devaluation of the dollar would be bad. It does not provide any evidence that Iraq switching to Euros would cause a devaluation. Nothing. I buy stuff from around the world all the time, I never need to consider what currency is ultimately making it to the seller. That's what markets are for. That doesn't follow. The party buying my Dollar and selling me a Euro obviously values my Dollar. That person will use the Dollar for another trade. By this argument, every time I buy any product the value of that product should sink. Now, of course, if no one in the world accepted dollars for anything the dollar would sink. But, we're talking about only 1 commodity here. That's not how I'd put it. The dollar declined because traders could get a better return on their investments elsewhere.