NEW YORK (TheStreet) -- GT Solar International (SOLR, JX Holdings (Pink: JXHLY) and ReneSola (SOL - Get Report) emerged top gainers, while Complete Production Services (CPX, Canadian Natural Resource (CNQ - Get Report) and RPC (RES - Get Report) headed the losers' list.GT Solar hit 15-month highs on Friday, jumping 15%. During the week, the company received the first order worth $37.5 million for its new DSS650 multi-crystalline ingot growth system from Korea's Nexolon. Meanwhile, JX Holdings surged 12.9% after its subsidiary JX Nippon Oil and Gas Exploration discovered natural gas and condensate reserves in Vietnam. ReneSola gained around 11.1% on the strong performance of solar stocks. Among other solar stocks, Trina Solar ( TSL, Yingli Green Energy Holdings ( YGE, LDK Solar ( LDK and JA Solar Holdings ( JASO scaled up around 6.1%, 5.9%, 3.1% and 2.9%, respectively. Cobalt International Energy ( CIE advanced 8.5% after The Age, an Austrian daily, reported the company is on BHP Billiton's ( BHP potential acquisition list. Noble Energy ( NBL and Andarko Petroleum ( APC also feature in this acquisition list. Frontline ( FRO zoomed around 8.4% last week. The company has decided to sell its VLCC Front Shanghai for proceeds of $91 million last week. Bankers Petroleum (Pink: BNKJF) piled 8.0% after RBC capital markets and Scotia Capital raised the stock's rating to outperform from sector perform with target prices of C$10.0 and C$9.50, respectively. Transocean ( RIG gained 8.0% despite a White House Panel ruling that the company, along with BP ( BP - Get Report) and Halliburton ( HAL - Get Report), had taken a series of risky, cost-cutting decisions that contributed toward the oil spill that ravaged the Gulf of Mexico last year. Energen ( EGN scaled up 7.9% after Wells Fargo Securities upgraded the stock to outperform from market perform. InterOil ( IOC and Petrohawk Energy ( HK, 10 energy stocks for 2011 gained around 6.1% and 5.3%, respectively. Other winners include SandRidge Energy ( SD, Diamond Offshore Drilling ( DO and Marathon Oil ( MRO, up 6.7%, 5.5% and 4.3%, respectively. Complete Production Services led the pack of losers, declining 10.8% to two-month lows and below its 50-day moving average. Canadian Natural Resource shed around 7.7%, pressured by an explosion at its oil-sands processing operations in Alberta, Canada. The explosion has cut back its oil production by around 15%, according to an analyst at Canaccord Genuity, Bloomberg reports. RPC ( RES - Get Report) and Patterson-UTI Energy ( PTEN trimmed nearly 7.5%, and 7.2%, respectively. Bill Barrett ( BBG declined 6.5% after Wells Fargo Securities downgraded the stock to market perform from outperform.
Ecopetrol ( EC lost nearly 6.1% last week. The company, along with Petrobras ( PBR - Get Report), has signed an agreement with Repsol YPF ( REP, consenting to the latter's participation in the exploration of the Tayrona block, located off Colombia's Caribbean coast. Meanwhile, Petrobras declined around 4.3% last week. Halliburton fell 5.8% last week, doomed by the BP oil spill probe. Murphy Oil ( MUR declined 4.7% after the company announced that it had abandoned three exploration wells in the Republic of Congo. Lufkin Industries ( LUFK trimmed 3.7% after the stock was cut to market perform at Raymond James. Among other losers, Chesapeake Midstream Partners ( CHKM, Rowan Companies ( RDC and Key Energy Services ( KEG dropped around 5.0%, 4.9% and 4.8%, respectively.