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 ( TheStreet) - Clean Edge and Nasdaq's three benchmark clean-tech stock indexes experienced a week of mixed performance, with the Nasdaq Clean Edge Green Energy Index ( CELS) down 3.08 percent, the Nasdaq OMX Clean Edge Global Wind Energy Index ( QWND) lower by 0.26 percent, and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index ( QGRD) up 0.42 percent from the previous week. The overall market moved slightly higher. The S&P 500 gained 0.10 percent and Nasdaq was up 0.13 percent. The AMEX Oil rose 1.06 percent from the previous week. CELS, down 3.08 percent for the week and 13.85 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 49 total component securities, 15 experienced gains and 34 lost ground. CELS' best performer for the week was demand management firm EnerNOC ( ENOC), gaining 13.62 percent. Rounding out the top five CELS performers were power management device maker IXYS ( IXYS), up 9.79 percent; demand energy management service provider Comverge ( COMV), higher by 7.14 percent; ethanol producer Green Plains Renewable Energy ( GPRE), up 5.85 percent; and electric car maker Tesla Motors ( TSLA), 5.68 percent higher for the week. CELS' worst performer last week was Chinese solar wafer manufacturer ReneSola ( SOL), declining 19.76 percent. Other poor performers included energy storage technology developer A123 Systems (AONE), losing 12.58 percent; PV product maker Energy Conversion Devices ( ENER), down 12.44 percent; solar cell and module maker Canadian Solar ( CSIQ), retreating 12.08 percent; and wind energy product and service provider Broadwind Energy ( BWEN), 11.25 percent lower for the week. QWND -- 0.26 percent lower last week and 23.61 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, nine saw gains, eight experienced losses, and one remained unchanged. QWND's best pure play performer for the week was wind turbine gear transmission provider China High Speed Transmission Equipment Group (0658), up 5.90 percent. Other top pure play performers included wind turbine maker REpower Systems ( RPW), gaining 5.71 percent; advanced composite materials developer Gurit Holding ( GUR), rising 3.69 percent; France-based wind farm developer Theolia ( TEO), up 3.45 percent; and wind project developer China WindPower Group (0182), up 2.74 percent for the week.
QWND's worst pure play performers were wind turbine gearbox maker Hansen Transmission International ( HSN), losing 16.77 percent; wind project developer Infigen Energy ( IFN), down 16.67 percent; wind turbine manufacturer Nordex ( NDXI), losing 13.01 percent; wind farm owner and operator Japan Wind Development (2766), declining 2.67 percent; and renewable energy project developer EDF Energies Nouvelles ( EEN), falling 1.87 percent from the previous week. QGRD -- 0.42 percent higher from the previous week and 14.60 percent higher than a year ago -- 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 22 pure play components, 10 experienced positive movement while 12 saw losses. QGRD's best pure play performer was EnerNOC, up 13.62 percent for the week. Rounding out the top five pure play performers were Comverge, gaining 7.14 percent; utility wire and cable provider General Cable ( BGC), rising 2.13 percent; electric management and automation equipment provider Schneider Electric ( SU), 2.05 percent lower; and Italy-based utility wire and cable provider Prysmian ( PRY), lower by 1.40 percent. QGRD's worst performers included power conversion device maker Power-One ( PWER), losing 8.71 percent; smart grid service provider PowerSecure ( POWR), down 6.59 percent; solar inverter maker SMA Solar Technology (S92), down 5.31 percent; renewable energy project integrator SatCon Technology ( SATC), lower by 4.38 percent; and utility network infrastructure provider Echelon ( ELON), falling 2.93 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.