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National Semiconductor Down 9.4% Ahead of Earnings

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National Semiconductor


was down 9.4% in early trading. The chipmaker today is scheduled to release second quarter-earnings. The Street's estimate is 51 cents per share vs. the year-ago result of 37 cents.

Semiconductors were broadly lower in the wake of more evidence of slowing PC sales and a warning from





Semiconductor Index

was down 3.9%. But sector bellwether



was up 3.9% after striking a 52-week low Wednesday.