Metals and agricultural contracts were for the most part weaker in Tuesday's trading session, while energy futures were divided. Crude oil for May delivery was down 64 cents at $53.16 a barrel in New York, and reformulated gasoline was losing about half a penny to $1.48 a gallon. Heating oil was up 1 cent to $1.48 a gallon, and natural gas was better by 4 cents at $4.33 per million British thermal units. Gold dropped $28.60 to $923.90 an ounce, and silver fell 52 cents to $13.36 an ounce. Copper was fractionally lower at $1.80 a pound. Most agricultural futures dropped, though cocoa, soybeans and frozen concentrated orange juice rose. Sugar and wheat fell roughly 3%, and cotton was down 2.3%. Lean hogs rose, and cattle declined. In the foreign exchange market, the dollar advanced against the euro and the yen, but it retreated vs. the pound and the Canadian dollar. The Reuters/Jefferies CRB Index was down 2.19 points at 227.35. Meanwhile, commodity-related stocks were mixed. Among oil majors, Exxon Mobil ( XOM) was down 0.6% to $70.13, and Chevron ( CVX) was up 0.9% at $69.80.