Every time the price of oil goes down, the GNP goes up. I think the ratio is $10 drop=1% increase in GNP, but it may be $5=1%. The market knows this. The market also knows that this war has saved approximately $310 BILLION according to one study of what we would have had to put up in enforcement costs; containment of Iraq; and losses in human capital in Iraq itself.
Moreover, this war will open up (slightly at first) still newer markets for U.S. goods.