The top pre-market NASDAQ Stock Market gainers are: TradeStation Group, Biogen Idec, Select Comfort, Datalink, Entegris, Apple, and Qualcomm. The top pre-market NASDAQ Stock Market losers are: ZST Digital Networks, Teva Pharmaceutical Industries, Sina, Lam Research, and Vodafone Group.

Gainers

TradeStation Group Inc. (TRAD) stock jumped 30.63 percent to $9.68 in the pre-market trading, as it agreed to be acquired by Monex Group Inc. for about $411 million. TradeStation's shareholders will receive $9.75 in cash for each share, which represents a 32 percent premium to TradeStation's closing stock price on April 20. Monex will commence a tender offer for all of the outstanding shares of TradeStation by May 10. If the tender offer is successfully completed, the parties expect the transaction to close early in the 2011 third quarter.

Biogen Idec Inc. (BIIB) stock climbed 26.49 percent to $109.50 in the pre-market trading, as its first quarter earnings and revenue exceeded Street view. Adjusted profit was $349.3 million or $1.43 a share, up from $296.4 million or $1.08 a share last year. Revenue grew 9 percent to $1.2 billion, on continued growth of TYSABRI revenues, which increased 15 percent to $251 million, and AVONEX revenues, which rose 8 percent to $642 million. Analysts had expected profit of $1.41 a share on revenue of $1.18 billion. The stock is set to reach a new life-time high during Thursday's trading.

Select Comfort Corp. (SCSS) stock jumped 20.57 percent to $16 in the pre-market trading, as its first quarter earnings and sales exceeded Street view. Profit was $16.6 million or 30 cents a share, up from $7.8 million or 14 cents a share last year. Sales grew 22 percent to $193.1 million, driven by a company-owned comparable sales growth of 26 percent. Analysts had expected profit of 19 cents a share on revenue of $166.56 million.

The company raised its fiscal 2011 earnings guidance to range of 85 cents to 93 cents a share from previous forecast of 68 cents to 74 cents a share, while Street analysts predict 71 cents a share.

Datalink Corp. (DTLK) stock improved 17.50 percent to $7.32 in the pre-market trading, as its first quarter earnings and revenue exceeded Street view. Adjusted profit was $2.2 million or 16 cents a share, up from $107,000 or 1 cent a share last year. Revenue grew 37 percent to $85.7 million. Analysts had expected profit of 12 cents a share on revenue of $79.67 million. The company expects second quarter adjusted earnings of 9 cents to 13 cents a share and revenue of $80 million to $86 million, while Street predicts profit of 9 cents a share on revenue of $76.70 million.

Entegris, Inc. (ENTG) stock improved 13.33 percent to $9.35 in the pre-market trading, as its first quarter earnings and revenue exceeded Street view. Adjusted profit was $30.9 million or 23 cents a share, up from $19.3 million or 15 cents a share last year. Sales rose to $203.1 million from $160.5 million. Analysts had expected profit of 20 cents a share on revenue of $187.94 million.

The company expects second quarter adjusted earnings of 22 cents to 25 cents a share and sales of $200 million to $210 million, while Street analysts predict profit of 22 cents a share on revenue of $192.91 million.

Apple Inc. (AAPL) stock increased 4.21 percent to $356.81 in the pre-market trading, as its second quarter earnings and revenue exceeded Street view. Profit was $6.0 billion or $6.40 a share, up from $3.1 billion or $3.33 a share last year. Sales rose to $24.7 billion from $13.5 billion. Analysts had expected profit of $5.36 a share on revenue of $23.34 billion.

During the second quarter, Apple said it sold 3.76 million Macs, a 28 percent unit increase over the year-ago quarter. The company sold 18.65 million iPhones, representing 113 percent unit growth over last year. Apple sold 9.02 million iPods, representing a 17 percent unit decline from year-ago. The company also sold 4.69 million iPads during the second quarter. The company expects third quarter earnings of about $5.03 a share and revenue of about $23 billion, while Street predicts profit of $5.25 a share on revenue of $23.82 billion.

Qualcomm Inc. (QCOM) stock gained 3.67 percent to $57.30 in the pre-market trading, as its second quarter earnings exceeded Street view. Profit was $999 million or 59 cents a share, up from $774 million or 46 cents a share last year. Adjusted earnings were $1.45 billion or 86 cents a share for the latest quarter. Revenue grew 46 percent to $3.87 billion. Analysts had expected profit of 80 cents a share on revenue of $3.62 billion.

Qualcomm expects third quarter adjusted earnings of 68 cents to 72 cents a share and revenue of $3.35 billion to $3.65 billion, while Street predicts profit of 69 cents a share on revenue of $3.39 billion. The company raised its fiscal 2011 adjusted profit guidance to range of $3.05 to $3.13 a share from previous forecast of $2.91 to $3.05 a share. The company also increased its 2011 revenue outlook to range of $14.1 billion to $14.7 billion from previous range of $13.6 billion to $14.2 billion. Analysts expect profit of $3.04 a share on revenue of $13.93 billion for fiscal 2011.

Losers

ZST Digital Networks, Inc. (ZSTN) stock plummeted 18.81 percent to $3.54 in the pre-market trading.

Teva Pharmaceutical Industries Ltd. (TEVA) stock plunged 8.18 percent to $45.15 in the pre-market trading, as Novartis AG (NVS) sued Teva in a U.S. federal court alleging infringement of patents for Myfortic, used to help prevent organ rejection in kidney transplant patients. Teva has applied to the FDA for permission to market copies of delayed-release Myfortic before the three Novartis patents expire, Novartis said in a complaint filed in federal court in Wilmington, Delaware. Novartis is asking for an order to confirm infringement, an injunction against U.S. sales and unspecified damages.

Sina Corp. (SINA) stock tumbled 5.19 percent to $135.42 in the pre-market trading.

Lam Research Corp. (LRCX) stock fell 3.54 percent to $50.20 in the pre-market trading. Profit for the third quarter was $182.2 million or $1.45 a share, up from $120.3 million or $0.94 a share last year. Revenue rose to $809 million from $632.7 million. Analysts had expected profit of $1.36 a share on revenue of $804.93 million. Looking ahead, the company sounded confident for the future as demand for smartphones and other electronic devices would likely drive a healthy level of investment on the part of its customers over the course of calendar 2011.

In the conference call, Lam Research said it expects fourth quarter earnings of $1.07 a share, plus or minus $0.07 a share, and revenue of $745 million, plus or minus $20 million. Street analysts predict profit of $1.39 a share on revenue of $830.59 million for the fourth quarter. The company forecasts fourth quarter shipments of $780 million, plus or minus $25 million.

Vodafone Group plc (VOD) stock slid 2.94 percent to $28.41 in the pre-market trading.

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