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Empresas y finanzas

Wall St opens up materials shares and retailers


    NEW YORK (Reuters) - Stocks opened higher on Tuesday as materials shares were boosted by merger and acquisition talk and better-than-expected profits from Wal-Mart and Home Depot.

    * In the materials sector, CF Industries Holdings Inc jumped more than 8 percent after Potash Corp of Saskatchewan rejected an unsolicited bid from BHP Billiton .

    * The Dow Jones industrial average rose 55.18 points, or 0.54 percent, to 10,357.19. The Standard & Poor's 500 Index added 7.57 points, or 0.70 percent, to 1,086.95. The Nasdaq Composite Index gained 17.36 points, or 0.80 percent, to 2,199.23.

    (Reporting by Leah Schnurr; editing by Jeffrey Benkoe)