BOSTON (TheStreet) -- The S&P 500 Index has risen more than 4% in 2011, a faster pace than last year. But, recent geopolitical uncertainty has held back gains.The benchmark for U.S. stocks has fallen from a high of 1,343 reached Feb. 18. Unrest in the Middle East and the subsequent spike in the price of crude oil spooked investors about consumers' tolerance for higher gasoline prices. Then, the earthquake and ensuing nuclear calamity prompted a sell-off. Shares rebounded in the past week, but there are other risks looming -- a host of geopolitical concerns and the threat of slower economic and profit growth. 10 Worst-Performing S&P 500 Stocks of 2011 Amid this backdrop of uncertainty, the following 10 S&P 500 components have delivered outstanding 2011 gains, rising at least 32% and as much as 43%. Below is a look at what propelled their share prices. 10. CBS Corp. ( CBS - Get Report) is a diversified media company, with television broadcasting, publishing and billboard advertising businesses. The company's stock has jumped 30% in 2011 on strong quarterly results and expectations for higher advertising demand, and rates, as the recovery accelerates. CBS has lucrative broadcasting deals, including the rights to AFC NFL games and to the NCAA Men's College Basketball Championship. Its stock, still reasonably valued, costs 13-times forward earnings, a discount of more than 50% to the media industry average. CBS recently inked a deal with Netflix ( NFLX), which will stream its content online, and was named a Morgan Stanley ( MS) Best Idea. The company is predicted to buy back billions of dollars worth of shares in 2011 and 2012.
8. Cabot Oil & Gas ( COG - Get Report) is another beneficiary of growing energy demand. Based in Houston, Cabot is an oil and gas exploration company that also produces and stores natural gas for resale. The company's stock is up 35% in 2011. Most of Cabot's sales come from natural gas, an abundant resource here in the U.S. that hasn't enjoyed the price jump that crude oil has. Its realized natural-gas price fell 28% in 2010, but hedging helped offset that drop. Adjusted fourth-quarter earnings still tumbled 75% to 19 cents and sales dropped 7.1%. Cabot is involved in the Marcellus shale project. As a result, Morgan Stanley expects Cabot to boost total production 40% during 2011. Recent Middle East turbulence should benefit the longer-term demand for natural gas, which, unlike oil, is overflowing in the U.S.
6. Marathon Oil ( MRO - Get Report) is an integrated oil and gas exploration and production company with a market value of $36 billion. It discovers, drills for, produces, refines and markets petroleum products. Marathon's stock has climbed 38% in 2011, besting indices and energy competitors. Its adjusted fourth-quarter earnings more than tripled to $1.09, as sales increased 29%. Marathon is still quite cheap, selling for 8.9-times forward earnings, a 35% industry discount. About two-thirds of analysts who evaluate the company recommend buying its stock. Goldman Sachs ( GS) expects it to rise another 33% to $68. Refineries, which generally have poor margins, are soaring because, as oil prices retain $100-a-barrel-plus territory, profits multiply.
4. Tesoro ( TSO) is an oil refiner and marketer, turning raw petroleum products into transportation fuels, including gasoline, jet fuel and diesel. It sells these fuels in wholesale and retail markets, with nearly 900 stations selling to car drivers in the U.S. Tesoro's stock has soared 42% already in 2011 as its outlook improved dramatically. Whereas integrated oil companies' profits improve on higher oil, refiners, like Tesoro, swing from consistent losses to sizable profits as crude prices pop. Tesoro's fourth-quarter loss narrowed 88% to 13 cents a share as sales increased 20% to $5.5 billion. The operating margin climbed into positive territory. Tesoro is still cheap relative to peer equities, selling for a forward earnings multiple of 10, a 26% discount. A third of analysts in coverage rank it "buy."
2. Big Lots ( BIG) is a closeout retailer, selling food, health and beauty and decorative products. Its stock has surged 43% in 2011 as management expressed interest in a private-equity takeover. Big Lots has enjoyed solid sales and profit growth since the recession and is considered a likely retail target. Its fourth-quarter adjusted earnings grew 11% to $1.46, exceeding estimates, as sales advanced 3.8%. The consumer trade-down stocks, also including Dollar Tree ( DLTR) and Family Dollar ( FDO), have continued to outperform during the recovery because consumers' debt levels and unemployment have remained elevated. Big Lots shares sell for a forward earnings multiple of 12, a 39% retail-industry discount. Around 31% of researchers rank the stock "buy", giving it lackluster sentiment.