NEW YORK (TheStreet - Clean Edge and NASDAQ's three benchmark clean-tech stock indices experienced mixed performance last week with the NASDAQ Clean Edge Green Energy Index (CELS) up 3.39 percent, the NASDAQ OMX Clean Edge Global Wind Energy Index(QWND) losing 0.64 percent, and the NASDAQ OMX Clean Edge Smart Grid Infrastructure Index(QGRD) 0.19 percent higher from the previous week.
The overall market also saw mixed movement last week - the S&P 500 lost 0.19 percent, NASDAQ grew 1.11 percent and AMEX Oil retreated 0.70 percent.
CELS -- up 3.39 percent for the week and 39.16 percent higher than a year ago -- tracks U.S.-listed clean-energy companies and is divided into four categories: advanced materials; energy intelligence; energy storage and conversion; and renewable electricity generation and renewable fuels.
In the advanced materials sector, three component companies were in positive territory with the remaining two down. Energy intelligence had 20 components up and three down. In energy storage and conversion, three components were in positive territory while five lost ground. For renewable electricity and fuels, seven components were up and 10 were down from the previous week's close.CELS' best performer for the week was energy-efficient power conversion equipment maker Power-One (PWER), gaining 15.68 percent. Rounding out the top five CELS performers were semiconductor maker IXYS Corporation (IXYS), up 13.01 percent; semiconductor developer Fairchild Semiconductor (FCS), rising 10.57 percent; thin-film solar manufacturer First Solar (FSLR), gaining 8.24 percent; and power management integrated circuit maker O2Micro International (OIIM). CELS' worst performer last week was fuel cell developer Ballard Power Systems (BLDP), declining 10.57 percent. Other worst performers included solar cell and module maker Canadian Solar (CSIQ), falling 8.34 percent; ethanol producer Green Plains Renewable Energy (GPRE), losing 4.85 percent; energy storage developer Advanced Battery Technologies (ABAT), down 3.88 percent; and microturbine manufacturer Capstone Turbine Corporation (CPST), losing 3.05 percent. QWND - down 0.64 percent last week but 20.45 percent higher in the last 12 months - includes companies that are primarily manufacturers, developers, distributors, installers, and users of energy derived from wind sources. Of QWND's 21 pure play components, five saw gains last week while 16 lost ground. QWND's best pure play performer for the week was gearbox and drive train maker Hansen Transmissions International (HSN), gaining 6.64 percent. Other top pure play performers included energy delivery technology developer American Superconductor (AMSC), up 4.97 percent; Denmark-based wind energy producer Greentech Energy Systems (GES), rising 3.30 percent; Denmark- based wind turbine manufacturer VWS gaining 3.06 percent; and wind turbine manufacturer NDX1 higher by 2.12 percent.
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