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Fiber optics maker

JDS Uniphase


was down 2.4% in midmorning after opening higher. Investors were awaiting the company's earnings, due after the close, for more clues about the future of the optics sector.

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The group took a slam Wednesday after



reported disappointing sales growth. The Street expects JDS Uniphase to report earnings of 16 cents per share vs. 8 cents a year ago. Nortel was up 1.5%.