NEW YORK ( TheStreet) -- EV Energy Partner ( EVEP), Cobalt International Energy ( CIE), Cheniere Energy Partners ( CQP) showed strength this past week, whereas Trina Solar ( TSL), Yingli Green Energy Holding ( YGE), JA Solar Holdings ( JASO) and Suntech Power Holdings ( STP) eroded substantial value.EV Energy Partner led the pack of winners last week, up 6.7%. Cobalt International Energy and Cheniere Energy Partners rose 5.6% and 3.6%, respectively. Other movers were Niska Gas Storage Partners ( NKA) (+3.1%), Enbridge Energy Management ( EEQ) (+1.7%) and Swift Energy ( SFY) (+1.2%). Ensco ( ESV) gained 1.2% after Daniel Rabun, the company's CEO, announced Ensco would consider share buyback programs or new acquisitions in 2013. The company sees total demand for rigs from Brazil particularly strong, as the country seeks to tap its abundant reserves. TC Pipelines ( TCLP), Atlas Pipeline Partners ( APL), Core Laboratories ( CLB), Chesapeake Midstream Partners ( CHKM) and Linn Energy ( LINE) appreciated less than 1% last week. Targa Resources Partners ( NGLS) rose 0.2% after Tudor Pickering raised the stock to accumulate from hold. Trina Solar was the top decliner last week, plunging a steep 29.5%. Yingli Green Energy Holding and JA Solar Holdings dropped 24% and 19%, respectively. Suntech Power Holdings erased 18.3%. Other losers were Cie Generale de Geophysique-Veritas ( CGV) (-16.8%), Frontline Ltd/Bermuda ( FRO) (-15.4%), Precision Drilling ( PDS) (-14.8%) and TransAtlantic Petroleum ( TAT) (-13.7%). LDK Solar ( LDK) declined 14.7% after equity analyst James Kelleher at Argus Research downgraded the stock to sell from hold. Other solar stocks showing weakness were SunPower Corp ( SPWRA), ReneSola ( SOL), First Solar ( FSLR) and STR Holdings ( STRI), shedding more than 9% each. Another notable loser was CNOOC ( CEO), down 12.5%. Eni ( E) shed 9.2% after UBS removed it from its list of most preferred oil shares.