COPPER'S GLOSS: Copper prices rose on expectations that global demand will remain brisk and supplies will tighten. Copper settled up 2.5 percent, leading most metals higher.
DOLLAR PLAY: Many commodities benefited from a weaker dollar. Since most commodities are priced in dollars, a weaker dollar makes them more of a bargain for buyers using other currencies such as the euro.
TREADING WATER: Oil prices rose slightly. Prices have been gaining steadily for weeks because traders are worried supplies may be disrupted by uprisings in Libya and other countries in the Middle East and North Africa.