Clean Edge and Nasdaq's three benchmark clean-tech stock indexes each had solid gains last week with the Nasdaq Clean Edge Green Energy Index (CELS) up 4.88%, the Nasdaq OMX Clean Edge Global Wind Energy Index (QWND) growing 4.14%, and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index (QGRD) 4.46% higher from the previous week.

The overall market also had a positive week -- the S&P 500 gained 3.10%; Nasdaq added 3.94% and Amex Oil ended the week up 4.26%.

CELS -- up 4.88% for the week and 76.18% 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, all five component companies were in positive territory. Energy intelligence had 18 components up and two down. In energy storage and conversion, eight components were in positive territory and two lost ground. For renewable electricity and fuels, 14 components were up and one was down.

CELS' best performer for the week was advanced composite material maker Hexcel ( HXL), gaining 16.06%. Rounding out the top five CELS performers were PV manufacturer Evergreen Solar ( ESLR), up 15.18%; solar cell and module maker Canadian Solar ( CSIQ), rising 12.60%; demand energy management firm Comverge ( COMV), gaining 12.37%; and electronic materials provider Rubicon Technology ( RBCN), up 12.29%.

CELS' worst performer last week was solar manufacturing equipment provider GT Solar International ( SOLR), declining 0.94%. Other worst performers included energy storage product developer Maxwell Technologies ( MXWL), falling 4.47%; lithium-ion battery maker Valence Technology ( VLNC), losing 2.15%; semiconductor manufacturer IXYS ( IXYS), down 1.41%; and geothermal power developer Raser Technologies ( RZ), losing 0.94%.

QWND -- up 4.14% last week and 32.65% 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 23 pure-play components, 20 saw gains last week while the remaining three lost ground.

QWND's best pure-play performer for the week was India-based wind power company Suzlon Energy , gaining 14.13%. Other top pure-play performers included wind turbine component maker China High Speed Transmission Equipment Group, up 12.48%; Greek renewable energy developer Terna Energy , rising 11.22%; wind farm developer China WindPower Group, gaining 10.59%; and energy delivery technology developer American Superconductor ( AMSC), down 10.54%.

QWND's worst pure-play performers were advanced composite material provider Gurit Holding ( GUR), declining 3.08%; German renewable energy developer PNE Wind, down 2.67%; wind turbine maker Clipper Windpower ( CWP), losing 0.93%; renewable energy project operator EDF Energies Nouvelles, gaining 0.08%; and wind turbine developer REpower Systems ( RPW), up 0.81%.

QGRD -- up 4.46% from the previous week -- is composed of companies that are primarily involved in the electric grid; electric meters, devices, and networks; energy storage and management; and enabling software used by the smart grid and electric infrastructure sector. Last week, 13 of the 17 pure play QGRD components saw gains while the remaining four lost ground.

QGRD's best pure-play performer was Comverge, gaining 12.37%. Rounding out the top five pure-play performers were American Superconductor ( AMSC), up 10.54%; network infrastructure product maker Echelon ( ELON), rising 9.98%; Chinese distribution transformer developer Jinpan International ( JST), 9.29% higher; and network product provider ESCO Technologies ( ESE), rising 7.80%.

QGRD's worst performers included large-scale power conversion provider SatCon Technology ( SATC), losing 2.56%; energy contracting service provider Quanta Services ( PWR), down 1.63%; energy storage developer NGK Insulators , retreating 0.58%; communication equipment maker RuggedCom ( RCM), down 0.44%; and transmission grid owner and operator ITC ( ITC), up 2.04%.

This information is not intended to be used as a guide to investing, and the authors make no guarantees that any investments based on the information contained herein will benefit you in specific applications, owing to the risk that is involved in investing of almost any kind. For more on Clean Edge's stock indexes -- including methodology, components, historical performance, financial products and licensing information, please visit
Clean Edge, Inc., founded in 2000, is the world's first research and publishing firm devoted to the clean-tech sector. The company, via its publications, events, and online services, helps companies, investors, and governments understand and profit from clean technologies. Clean Edge, with offices in the San Francisco Bay Area and Portland Oregon, offers insight and intelligence on emerging clean-tech trends, opportunities, and challenges. The company publishes a range of reports including the annual Clean Energy Trends and Clean Tech Job Trends report series; hosts the annual Clean-Tech Investor Summit (along with IBF); maintains a number of benchmark clean-tech stock indices with NASDAQ OMX including CELS, QGRD, and QWND; and produces Clean Edge Jobs, a leading online jobs board for clean-tech job seekers, employers, and recruiters. To keep abreast of the latest clean-tech news; access industry reports; learn more about our services; or sign up for our free e-newsletters; visit

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