NEW YORK ( TheStreet) -- GT Solar International (SOLR) was popping 12.7% to $13.10 in premarket trading Tuesday after the Merrimack, N.H.-based provider of production equipment and materials for the solar and LED markets blew past Wall Street's expectations for its fiscal fourth quarter and boosted its forecast for fiscal 2012.
Electronics firm Sony (SNE - Get Report) said Tuesday that its music Web site in Greece has been hacked affecting 8,500 user accounts. Still, shares were up 4.2% to $27.70 in premarket trading Tuesday.
Shares of Autozone (AZO - Get Report) were rising 3.7% to $287 after the automotive replacement retailer posted third-quarter profit of $5.29 vs. the average analyst expectation of $4.98 a share.
Medical technology company Medtronic (MDT - Get Report) reported fourth-quarter non-GAAP profit of 90 cents a share vs. the consensus target of 92 cents a share. Shares were falling 2.5% to $40.25.
Shares AK Steel ( AKS) were rising 1.9% to $14.35 after the steel products producer announced a price increase for its carbon steel products. Base prices will increase by $50 a ton for hot-rolled and cold-rolled carbon steel products and by $60 a ton for coated carbon steel products.
Barrick Gold (ABX - Get Report) was rising 0.7% to $45.86 following reports that Zambia will permit the producer to buy the Lumwana copper mine in connection with its $7.5 billion purchase of Equinox Minerals (EQN), Bloomberg reported.
Semiconductor service company Applied Materials (AMAT - Get Report) is expected to post second-quarter profit of 37 cents a share on Tuesday. Shares were up 0.4% to $13.85.
Insurer American International Group's (AIG - Get Report) $9 billion stock offering is expected to price late Tuesday, according to reports. Shares were trading sideways at $30.
Russian search engine company Yandex ( YNDX) is expected to begin trading on Nasdaq under the symbol YNDX Tuesday. The IPO priced at $25 a share, which was better than expected.
J.M. Smucker ( SJM) increased prices for the majority of its coffee products sold in the U.S. by 11% on average. >>Search for Highest Dividends by Rate or Yield
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