Clean Edge and Nasdaq's three benchmark clean-tech stock indexes experienced mild movement last week with the Nasdaq Clean Edge Green Energy Index ( CELS) up 1.20 percent, the Nasdaq OMX Clean Edge Global Wind Energy Index ( QWND) losing 1.03 percent, and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index ( QGRD) 1.74 percent higher from the previous week.

The overall market also ended the week with relatively mild movement: the S&P 500 gained 2.51 percent, Nasdaq grew 1.10 percent, and AMEX Oil was 3.23 percent higher from the previous week.

CELS - up 1.20 percent for the week and 8.88 percent lower 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.

Of the 53 total component securities, 30 experienced gains, 22 lost ground, and one remained unchanged from the previous week's close.

CELS' best performer for the week was vertically integrated PV product maker Yingli Green Energy ( YGE), gaining 16.18 percent.

Rounding out the top five CELS performers were electronic materials provider Rubicon Technology ( RBCN), up 13.28 percent; energy storage technology developer Advanced Battery Technologies ( ABAT), higher by 12.93 percent; solar PV module maker Trina Solar ( TSL), rising 12.55 percent; and solar product manufacturer Solarfun Power ( SOLF), up 12.33 percent.

CELS' worst performer last week was stationary fuel cell developer FuelCell Energy ( FCEL), declining 28.75 percent.

Other worst performers included wind energy product and service provider Broadwind Energy ( BWEN), falling 8.95 percent; solar encapsulant maker STR Holdings ( STRI), losing 8.10 percent; solar laminate maker Energy Conversion Devices ( ENER), down 7.91 percent; and demand energy management firm Comverge ( COMV) (COMV), losing 7.62 percent.

QWND - down 1.03 percent last week and 34.12 percent lower 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, eight experienced gains and 13 saw losses.

QWND's best pure play performer for the week was wind turbine manufacturer Nordex ( NDX1), up 4.17 percent.

Other top pure play performers included renewable energy power plant developer Iberdrola Renovables ( IBR), gaining 3.98 percent; German wind turbine maker REpower Systems, rising 3.35 percent; Australian wind farm developer Infigen Energy ( IFN), growing 3.31 percent; and wind turbine manufacturer Vestas Wind Systems ( VWS), up 1.83 percent for the week.

GQWND's worst pure play performers were Broadwind Energy ( BWEN), declining 8.95 percent; wind power producer China Longyuan Power Group (0916), down 8.24 percent; wind energy developer China Windpower Group (0182), losing 8.22 percent; wind turbine part provider China High Speed Tranmission Equipment Group (0658), declining 7.72 percent; and advanced composite material maker Gurit Holding ( GUR) (GUR), down 4.38 percent from the previous week.

QGRD - up 1.74 percent 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 21 pure play QGRD components saw gains, 7 lost ground, and one remained unchanged.

QGRD's best pure play performer was large-scale power conversion technology provider Satcon Technology ( SATC), gaining 11.79 percent.

Rounding out the top five pure play performers were electric infrastructure specialty contractor MYR Group ( MYRG), up 10.63 percent; inverter maker SMA Solar Technology (S92), up 6.37 percent; utility service provider Pike Electric ( PIKE), 5.73 percent higher; and Italian energy infrastructure equipment provider Prysmian ( PRY), gaining 5.04 percent.

QGRD's worst performers included Comverge ( COMV), losing 7.62 percent; communication equipment maker RuggedCom ( RCM), down 5.54 percent; energy storage technology developer NGK Insulators (53330), retreating 5.24 percent; power conversion device maker Power-One ( PWER), down 2.07 percent; demand energy management service provider EnerNOC ( ENOC), lower by 1.88 percent.

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 website

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 CleanEdge.com.

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