3. Six Flags ( SIX) owns regional theme parks in North America. It filed for bankruptcy in 2009 and successfully exited in 2010. Based in Grand Prairie, Texas, Six Flags has enjoyed an 87% stock-price jump since June. Shares recorded a 52-week high yesterday, but then fell, posting a loss for the day. Of equity researchers following Six Flags, all six advocate buying its stock. Miller Tabak forecasts a rise to $72. Oppenheimer & Co. expects a rise to $70. Six Flags has a market value of $1.9 billion. Management announced a stock repurchase program in February.The company's fourth-quarter sales grew 20% to $122 million and EBITDA climbed into positive territory, to $22 million, helped by stronger in-park sales, admission ticket sales and sponsorship fees as well as a drop in cash operating costs. Six Flags increased attendance 19% in the quarter. Still, it remained unprofitable on a GAAP basis, with a $95 million loss, equal to $3.38 a share, for the fourth quarter. Its balance sheet continues to improve. Six Flags held $187 million of cash at quarter's end and $971 million of debt. Debt decreased by 60%.