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Traders had plenty of news to digest after the close Thursday, and several widely held tech shares were making sharp moves in the extra session.

Amgen

(AMGN) - Get Amgen Inc. Report

was among the most active stocks, falling 2.8% to $55.99 after the company disclosed plans to raise $2.5 billion through the sale of convertible debt.

BEA Systems

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was dropping 4.2% to $15.15 after the company posted earnings before items that met analysts' expectations. Revenue and earnings for the latest fourth quarter fell from the same period a year earlier.

Cisco

(CSCO) - Get Cisco Systems Inc. Report

was climbing 1.2% to $15.29.

In regular trading, the stock lost 9.3% after the company's CEO, John Chambers, told Lehman Brothers analysts that visibility was tough and that the strength seen in the past few months has now softened.

Xilinx

(XLNX) - Get Xilinx Inc. Report

was one of the late session's biggest winners, advancing 5% to $35.71 after the company raised its revenue guidance for the fourth quarter. The outlook was good enough to lift

Altera

(ALTR) - Get Altair Engineering Inc. Report

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4.7% to $20.75. The stocks of both companies, which make programmable logic devices, were lower in regular action.

Ciena

(CIEN) - Get Ciena Corporation Report

was dropping another 0.7%,

Intel

(INTC) - Get Intel Corporation Report

was up 0.6%, and

Microsoft

(MSFT) - Get Microsoft Corporation Report

was inching up 0.2%.

Oracle

(ORCL) - Get Oracle Corporation Report

was off 0.1%.

Sun Micro

(SUNW) - Get Sunworks Inc. Report

was tacking on 0.2%.

Nextel

(NXTL)

was unchanged.

The

Nasdaq 100 Unit Trust

(QQQ) - Get Invesco QQQ Trust Report

was up 0.4% to $33.63, and the

S&P 500 Depositary Receipts

(SPY) - Get SPDR S&P 500 ETF Trust Report

were ahead by 0.2% to $108.50.