The companies whose shares are moving in pre-market trade on Tuesday are: Best Buy, Micron Technology, Biogen Idec, Aetna, Discover Financial, Weatherford International, CVS, Country Style Cooking, Walgreen, Invesco Mortgage and Motorola Mobility Holdings.

Best Buy Co Inc. (NYSE:BBY) shares surged 3.99 percent to $31.54 in pre-market trading session after the news that the board of directors of BBY has authorized a new $5 billion share repurchase program.

Micron Technology Inc (NASDAQ:MU) shares gained 2.53 percent to $8.11 in pre-market trading session. The stock has a 52 week low of $6.36 and 52 week high of $11.95 and has $7.89 billion market capitalization.

Biogen Idec Inc. (NASDAQ:BIIB) shares advanced 2.47 percent to $101.03 in pre-market trading session. The company stock was upgraded to “buy” rating with a price target of $129 at Deutsche Bank.
Aetna Inc. (NYSE:AET) shares gained 3.86 percent to $46.50 in pre-market trading session.

Discover Financial Services (NYSE:DFS) shares advanced 2.62 percent to $24.24 in pre-market trading session. Bank of America said that it expects investors to focus on the credit outlook, loan growth and capital management when DFS reports second quarter results on Thursday.

Weatherford International, Ltd. (NYSE:WFT) shares advanced 1.89 percent to $17.22 in pre-market trading session. The company said on Monday that its U.S. subsidiary has reached an agreement with BP plc for settlement of any claims between the companies related to the Deepwater Horizon oil spill.

CVS Corp. (NYSE:CVS) shares gained 1.36 percent to $38.00 in pre-market trading session.

Country Style Cooking Restaurant Chain Co ltd. (NYSE:CCSC) slumped 15.09 percent to $9 in pre-market trading session.

Walgreen Co. (NYSE:WAG) shares plunged 4.89 percent to $45.18 in pre-market trading session after the company said the contract renewal negotiations with pharmacy benefit manager Express Scripts Inc. have been unsuccessful.

The company also reported third quarter net income of $603 million or $0.65 per share compared to $463 million or $0.47 per share in the same quarter last year.

Invesco Mortgage Capital Inc. (NYSE:IVR) shares declined 2.57 percent to $20.47 in pre-market trading session. The company announced that the public offering of 17.0 million common shares has priced at $20.15 per share for gross proceeds of about $342.6 million, before deducting underwriting discounts and estimated offering expenses.

Motorola Mobility Holdings Inc. (NYSE:MMI) shares declined 2.69 percent to $23.83 in pre-market trading session. The stock has a 52 week low of $22.56 and 52 week high of $36.54 and has $7.22 billion market capitalization.

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