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Clean Edge Indices Mixed Last Week

Stocks in this article: VICR RBCN MBLX

Clean Edge and Nasdaq's three benchmark clean-tech stock indexes experienced mixed movement last week with the Nasdaq Clean Edge Green Energy Index (CELS) down 2.24 percent, the Nasdaq OMX Clean Edge Global Wind Energy Index (QWND) falling 1.54 percent, and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index (QGRD) 0.09 percent higher from the previous week.

The overall market was slightly higher. The S&P 500 gained 1.54 percent and Nasdaq grew 3.23 percent, while AMEX Oil saw a 0.64 percent gain from the previous week.

CELS -- down 2.24 percent for the week and 1.65 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.

Of the 51 total component securities, 21 experienced gains, 29 experienced losses, and one remained unchanged for the week.

CELS' best performer for the week was power converter technology developer Vicor Corporation (VICR), gaining 17.07 percent.

Rounding out the top five CELS performers were electronic materials provider Rubicon Technology (RBCN), up 13.76 percent; biomaterial developer Metabolix (MBLX), higher by 7.92 percent; renewable energy project integrator SatCon Technology (SATC), up 4.09 percent; and power management device maker Power-One , 3.97 percent higher for the week.

CELS' worst performer last week was wind product and service provider Broadwind Energy (BWEN), declining 13.96 percent. Other worst performers included solar wafer and module manufacturer LDK Solar (LDK), losing 11.39 percent; LED lighting manufacturer Cree (CREE), down 11.24 percent; vertically integrated solar product maker Yingli Green Energy (YGE), retreating 11.20 percent; and Chinese solar product manufacturer ReneSola (SOL), 8.83 percent lower.

QWND -- down 1.54 percent last week and 34.52 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 18 pure play components, six experienced gains and 12 lost ground.

QWND's best pure play performer for the week was renewable energy developer Gamesa Corporacion Tecnologica (GAM), up 5.43 percent.

Other top pure play performers included renewable energy project developer EDP Renovaveis (EDPR), gaining 3.87 percent; Germany-based wind turbine maker REpower Systems (RPW), rising 2.39 percent; wind power producer Innergex Renewable Energy (INE), growing 1.24 percent; and wind turbine manufacturer Nordex (NDX1), 1.11 percent higher for the week.

QWND's worst pure play performers were wind turbine gearbox maker Hansen Transmissions International (HSN) (HSN), losing 16.36 percent; wind gear transmission equipment developer China High Speed Transmission Equipment Group (0658), down 4.86 percent; energy delivery technology developer American Superconductor (AMSC), losing 3.81 percent; wind project developer China WindPower Group (0182), declining 3.53 percent; and wind farm developer China Longyuan Power Group (0916), falling 3.47 percent from the previous week.

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