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Among the advancers, GT Solar topped the charts, jumping 18.2%. Ardour Capital reiterated a buy on the stock on improved prospects from the company's Sapphire business.
JA Solar rose 10.5% and Helix Energy Solutions gained 8.3% the week of June 20.
Energy XXI (Bermuda) advanced 8.3%. Analysts at Rodman & Renshaw maintained market perform on the stock and observed higher-than-expected production.
Other winners were
Rosetta Resources(ROSE) up 7.1%,
Brigham Exploration (BEXP) rose 6.6%,
Tesoro Corporation(TSO) grew 6.6%,
Holly Energy Partners(HEP) added 6.6%,
Cheniere Energy Partners(CQP) gained 6.5%,
Unit Corporation(UNT) improved 6.5%,
Atwood Oceanics(ATW) and
TC PipeLines(TCLP) piled 6.3% each.
Bill Barrett Corporation(BBG) moved up 6.2%. Global Hunter Securities equity analyst Michael Bodino rated a new accumulate on the stock with a 12-month target price of $59 per share.
Berry Petroleum(BRY) gained 6% during the week.
Oil States International(OIS) rose 5.5% after its subsidiary secured a contract from Subsea 7 to supply 27 FlexJoint Steel Catenary Riser terminations and 40 receptacle assemblies for the Guara and Lula NE oilfields in Brazil.
Other movers were
Oceaneering International(OII) rising 5.5%,
Teekay LNG Partners(TGP) up 5.2%,
Weatherford International(WFT) rose 5%, and
Holly Corporation(HOC) added 4.7% during the week.
STR Holdings(STRI) advanced 5%. Analysts at Maxim Group rated a new buy on the stock with a price target of $22 per share.
PAA Natural Gas Storage(PNG),
Mcmoran Exploration(MMR) and
Dril-Quip(DRQ) closed the week with gains of more than 4%.
Vestas was the top lagger, shedding 13.3%. Citi rated a sell on the stock on stretched valuations. The brokerage says the company could miss its year-over-year order intake growth for 2011 of 7 to 8 GW.
Aventine Renewable Energy Holdings declined 5.9% and LDK Solar lost 5.3% during the week.
EnCana Corporation(ECA) erased 4.6%. S&P revised Encana's outlook to negative on closure of PetroChina joint venture.
Niska Gas Storage Partners(NKA) pared 4.2%. UBS lowered its price target on the stock to $19 per share from $20 and maintained a neutral rating on it.
Nabors Industries(NBR) fell 4.2%. Analysts at Raymond James downgraded the stock to market perform from strong buy.
Others on the downside were
Occidental Petroleum(OXY) sliding 3.3%,
Legacy Reserves(LGCY) dropping 3.3%,
Nexen(NXY) erasing 3.1%,
Frontline(FRO) losing 2.5% and
Imperial Oil(IMO) eroding 2.1%.