Clean Edge and Nasdaq's three benchmark clean-tech stock indexes ended a quiet week with the Nasdaq Clean Edge Green Energy Index ( CELS) down 2.33 percent, the Nasdaq OMX Clean Edge Global Wind Energy Index ( QWND) rising 0.14 percent, and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index ( QGRD) 1.71 percent lower from the previous week.

The overall market saw similar movement. The S&P 500 lost 1.21 percent, Nasdaq fell 0.79 percent, and AMEX Oil was 0.08 percent lower from the previous week.

CELS. Which was down 2.33 percent for the week but 3.43 percent higher than a year ago, tracks U.S.-listed clean-energy companies. It 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, 10 enjoyed gains, 42 saw losses, and two ended the week unchanged.

CELS' best performer for the week was PV cell and module product maker Canadian Solar ( CSIQ), gaining 10.22 percent.

Rounding out the top five CELS performers were semiconductor maker Fairchild Semiconductor International ( FCS), up 8.01 percent; stationary fuel cell developer FuelCell Energy ( FCEL), higher by 6.96 percent; manufacturing equipment provider Aixtron ( AIXG), rising 5.69 percent; and Chinese solar product maker Trina Solar ( TSL), up 5.45 percent.

CELS' worst performer last week was wind energy product and service provider Broadwind Energy ( BWEN), declining 12.65 percent.

Other worst performers included demand management service provider Comverge ( COMV), losing 11.71 percent; energy storage device manufacturer Maxwell Technologies ( MXWL), down 11.25 percent; ethanol producer Green Plains Renewable Energy ( GPRE), retreating 10.10 percent; and LED and solar manufacturing equipment provider Veeco Instruments ( VECO), 1.76 percent lower.

QWND -- up 0.14 percent last week but 27.68 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, seven saw gains, 12 lost ground, and two were unchanged.

QWND's best pure play performer for the week was wind power project developer and operator Japan Wind Development Co. ( 2766), up 11.14 percent.

Other top pure play performers included wind turbine manufacturer Clipper Windpower ( CWP), gaining 5.56 percent; wind turbine maker Vestas Wind Systems ( VWS), rising 5.39 percent; renewable energy project developer EDF Energies Nouvelles ( EEN), growing 3.70 percent; and Greek renewable energy developer Terna Energy ( TENERGY), 3.40 percent higher.

QWND's worst pure play performers were Broadwind Energy, losing 12.65 percent; carbon fiber composite material developer Zoltek Companies ( ZOLT), down 7.44 percent; Spain-based renewable energy producer EDP Renovaveis ( EDPR), losing 4.89 percent; wind turbine manufacturer Nordex ( NDX1), declining 4.88 percent; and wind turbine parts maker China High Speed Transmission Equipment Group ( 0658), falling 4.20 percent from the previous week.

QGRD -- down 1.71 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. Of QGRD's 21 pure play components, 20 experienced losses and one ended the week unchanged.

QGRD's best pure play performer was Italy-based energy cable provider Prysmian ( PRY), unchanged for the week.

Rounding out the top five pure play performers were energy storage technology developer NGK Insulators ( 53330), down 0.42 percent; energy management and automation company Schneider Electric ( SU), falling 0.48 percent; renewable energy inverter maker SMA Solar Technology ( S92) , 0.84 percent lower; and transmission grid owner and operator ITC Holdings ( ITC), losing 1.08 percent.

QGRD's worst performers included transformer, substation, and switchgear maker Jinpan International ( JST), losing 24.42 percent; Comverge ( COMV), down 11.71 percent; utility industry specialty contractor Pike Electric ( PIKE), 7.81 percent lower; electrical infrastructure contractor MYR Group ( MYRG), falling 7.23 percent; electric utility specialty contractor Quanta Services ( PWR), lower by 6.10 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 www.cleanedge.com/ceindex.
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.