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NEW YORK ( TheStreet) - Weatherford Interantional(WFT), Cabot Oil & Gas(COG), Helix Energy Solutions(HLX) and Cameron International(CAM) were top performers this week, while SunPower(SPWRA), Cobalt International Energy(CIE) and Whiting Petroleum(WLL - Get Report) eroded substantial value.
Among the advancers this week, Weatherford International topped the charts, gaining 14% as equity analyst William Conroy at Pritchard Capital Partners raised the stock to buy from neutral with a target price of $29 per share.
Helix Energy Solutions rose 8.4% on the week after reporting profit. The second-quarter 2011 EPS stood at 39 cents per share compared to net loss of 82 cents in the corresponding quarter of 2010.
Cameron International rose 6.5% after the company posted better-than-expected results and raised its 2011 guidance. Revenue and EPS for the second quarter stood at $1.65 billion and 66 cents, respectively. The company observed a 72% jump in orders during the quarter over the same quarter prior year.
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Cabot Oil & Gas advanced 6.3%.
EQT(EQT - Get Report) rose 3.6% after better-than-expected results. Net income was $77.5 million, topping the estimated $63.5 million. EPS stood at 51 cents.
Range Resources(RRC - Get Report) increased 3.6% after Citi raised the stock to hold from sell.
SandRidge Energy(SD) advanced 2.9% for the week.
Superior Energy Services(SPN - Get Report) moved up 2.6% as the company has raised its 2011 EPS guidance to $1.96 to $2.16 per share vs. the earlier guided $1.62 to 2.02 per share.
Among other movers,
Williams Companies(WMB - Get Report),
Complete Production Services(CPX),
Noble Energy(NBL - Get Report) and
Holly Energy Partners(HEP - Get Report) added around 2%.
SunPower was the top lagger, shedding 15%. The company reported higher-than-forecast net loss. Stifel Nicolaus equity analyst at Jeff Osborne has downgraded the stock to sell from hold.
Cobalt International Energy shed 14.2%.
Whiting Petroleum declined 10.6% as BMO equity analyst Philip Jungwirth downgraded the stock to market perform from outperform with a target price of $65 per share.
GT Solar International(SOLR) retreated 9.9% as Credit Agricole Securities equity analyst Mark Heller has downgraded the stock to underperform from outperform with a target price of $16 per share.
Among other movers,
Carbo Ceramics(CRR - Get Report) fell 9%,
Swift Energy(SFY) reduced 8.9%,
Oasis Petroleum(OAS - Get Report) pared 8.2% and
Occidental Petroleum(OXY - Get Report) declined 7.7% for the week.