Midday Gainers; W&T Offshore up 13%
W&T Offshore (NYSE: WTI) +13.42% after Global Hunter upgraded the company to Buy.
Aluminum Corp. of China Limited (NYSE: ACH) +12.78% after Alcoa reported disappointing earnings yesterday.
China Southern Airlines (NYSE: ZNH) +11.11% on the strength in the Chinese stocks.
Gran Tierra Energy (NYSE: GTE) +10.90% after the company announced it will start exploration drilling in Brazil and Colombia.
Travelzoo (NASDAQ: TZOO) +9.82% after Jefferies initiated the company with Buy.







