Apple shares rose more than 4.5 percent on Wednesday, fueled by excitement over the pending launch of new iPod digital music players, which could entice current users to buy upgraded models. The stock climbed $5.74 to $132.56 in early trading, after Apple distributed invitations to a September 5 event in San Francisco. Goldman Sachs said in a note to clients that the date would bring "the almost certain launch of a new family of iPods."

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