NYSE

Tenet Healthcare Corp., up 55 cents at $31.18

An analyst at Deutsche Bank upgraded the hospital operator's stock to a "Buy," saying that Tenet's business is improving.

Capital One Financial Corp., up $1.18 at $58.01

A Janney Capital Markets analyst reiterated his "Buy" rating on the bank saying that recent credit losses were due to seasonality.

Nasdaq

Clearwire Corp., down 46 cents at $2.91

Sprint Nextel Corp., the cellphone company, raised its offer price for wireless network operator Clearwire to about $2.2 billion.

Caribou Coffee Co. Inc., up $3.78 at $16.10

The coffee chain is being taken private by German holding company Joh. A Benckiser Group GmbH in a deal worth about $340 million.

Compuware Corp., up $1.23 at $10.76

Elliott Management, the investment firm, is offering to buy the software company for about $2.35 billion, or $11 per share.

Francesca's Holdings Corp., up $1.28 at $25.94

A Jefferies analyst upgraded shares of the women's accessories and clothing store chain to a "Buy," citing growth potential.

Velti PLC, up 71 cents at $4.55

The mobile marketing company announced that it is hiring Jeff Ross to become the company's new chief financial officer.

Conns Inc., up $1.31 at $29.76

A Stifel Nicolaus analyst