Cabot Oil & Gas: +101% 2011 was not a great year for the oil and gas business. The Oil Service Sector Index (OSX) has declined more than 10% so far in 2011. Natural gas prices remain weak and declined nearly 25% this year. So why has Cabot Oil & Gas ( COG) jumped 101% this year? It all comes down to shale -- and in particular the Marcellus Shale. In the third quarter, Cabot Oil & Gas achieve a record production of natural gas in the Marcellus Shale in Susquehanna County, Pa. Capacity is expected to increase in the Marcellus Shale, so despite falling natural gas prices, total revenue and profit are expected to rise. Clearly, the rise in the company's share price is more about speculation in the future than current operating results as the stock sells for 56 times earnings and pays a miniscule dividend. Cabot was one of the 10 Best-Performing S&P 500 Stocks of 2011 and shows up on a recent list of 20 Winning Stocks Set to Post New Highs in 2012. To see these stocks in action, check out the High 5s for 2011 portfolio. And for the five biggest negative surprises of 2011, visit " 5 Big Surprise Loser Stocks of 2011." -- Written by Scott Rothbort in Millburn, N.J.