Earnings roundup: Weyerhaeuser, Duke Energy

Among the earnings stories for Friday, May 2, from AP Financial News:

Top stories:

FEDERAL WAY, Wash. (AP) _ Weyerhaeuser Co., one of the world's biggest lumber and paper producers, said Friday it swung to a loss in the first quarter, hurt by a sagging housing market and low product prices.

CHARLOTTE, N.C. (AP) _ Duke Energy Corp., one of the nation's largest electric power companies, said Friday its first-quarter profit rose 30 percent, boosted by the company's three largest business units.

Other stories:

DULUTH, Minn. (AP) _ Allete Inc., a coal, utility and real estate company, said Friday its first-quarter profit fell 10 percent as expenses rose and its Florida land business swung to a loss.

ATLANTA (AP) _ IntercontinentalExchange Inc.'s profit vaulted 66 percent in the first quarter as trading volume accelerated and the futures exchange operator added business from the New York Board of Trade, the company said Friday.

PITTSBURGH (AP) _ Calgon Carbon Corp., which provides water- and air-purifying products, said Friday its first-quarter profit jumped more than fivefold because of a gain from a legal settlement.

NEW YORK (AP) _ Entertainment company Viacom Inc. reported a 33 percent rise in first-quarter earnings Friday, lifted by stronger sales of the "Rock Band" video game.