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Clean Edge Stock Indices Experience Week of Declines

The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.

NEW YORK ( Clean Edge ) -- Clean Edge and Nasdaq's three benchmark clean-tech stock indices each retreated last week, with the Nasdaq Clean Edge Green Energy Index (CELS) down 3.67% , the Nasdaq OMX Clean Edge Global Wind Energy Index (QWND) lower by 1.22% , and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index (QGRD) falling 2.25% from the previous week.

The overall market also moved lower -- the S&P 500 lost 1.72% and NASDAQ was down 1.87% -- while AMEX Oil lost 0.20% from the previous week.

CELS -- down 3.67% for the week and 21.28% 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. Of the 49 total component securities, 10 experienced gains and 39 lost ground.

CELS' best performer for the week was biomaterials developer Metabolix (MBLX), gaining 5.30% . Rounding out the top five CELS performers were electronic materials provider Rubicon Technology (RBCN - Get Report), up 4.88% ; electric car maker Tesla Motors (TSLA - Get Report), higher by 1.86%; ethanol producer Green Plains Renewable Energy (GPRE - Get Report), up 1.22% ; and demand management firm EnerNOC (ENOC - Get Report), 1.06% higher for the week.

CELS' worst performer last week was renewable energy project integrator SatCon Technology (SATC), declining 15.84% . Other worst performers included geothermal power developer Ormat Technologies (ORA), losing 14.14% ; solar cell manufacturer JA Solar (JASO), down 13.73% ; power conversion technology developer Vicor Corporation (VICR), retreating 13.19% ; and wind energy product and service provider Broadwind Energy (BWEN), 12.57% lower for the week.

QWND--- 1.22% lower last week and 20.78% 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 18 pure play components, five saw gains and 13 experienced losses.

QWND's best pure play performer for the week was renewable energy project developer Gamesa Corporacion Tecnologica (GAM), up 7.08% . Other top pure play performers included wind turbine maker Vestas Wind Systems (VWS), gaining 6.52% ; wind turbine maker REpower Systems (RPW), rising 4.77% ; advanced composite materials developer Gurit Holding (GUR), up 1.19% ; and wind turbine manufacturer Nordex (NDX), up 1.07% for the week.

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