NYSE

Boston Beer Co. Inc., down $17.71 at $131.94

The brewer of Samuel Adams beer boosted its full-year 2012 earnings forecast to a level above what Wall Street expected.

Best Buy Co. Inc., up $1.94 at $14.12

Media reports said that the founder of the electronics retailer may make a bid for the company for as much as $6 billion.

Pep Boys - Manny, Moe & Jack, up 33 cents at $10.07

The automotive retail chain said that its board of directors approved a program to repurchase up to $50 million of its common stock.

Brinker International Inc., up 82 cents at $31.59

Citing its growing market share, a Citi analyst began coverage of the restaurant operator and Chili's owner with a "Buy" rating.

CVS Caremark Corp., up 96 cents at $48.50

The drugstore operator issued a 2013 profit prediction above expectations and announced an increase to its quarterly cash dividend.

Nasdaq

Clearwire Corp., up 41 cents at $3.16

Wireless carrier Sprint Nextel Corp. offered to buy out the minority shareholders of the wireless network operator for $2.1 billion.

Rigel Pharmaceuticals Inc., down $2.92 at $5.51

Rigel and its partner AstraZeneca reported that their experimental rheumatoid arthritis drug performed worse than Abbott's Humira.

Zagg Inc., up 71 cents

The mobile device accessories maker announced that its board of directors approved a $10 million share-repurchasing program.