NEW YORK (TheStreet) -- Clean Edge and Nasdaq's three benchmark clean-tech stock indices experienced mixed performance last week with the Nasdaq Clean Edge Green Energy Index (CELS) up 0.25 percent, the Nasdaq OMX Clean Edge Global Wind Energy Index (QWND) losing 2.61 percent, and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index (QGRD) 1.06 percent higher from the previous week.

The overall market saw positive movement last week -- the S&P 500 gained 2.11 percent, Nasdaq grew 1.97 percent and AMEX Oil was up 1.94 percent.

CELS - up 0.25 percent for the week and 42.34 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.

In the advanced materials sector, four component companies were in positive territory with the remaining one down. Energy intelligence had 14 components up, eight down, and one unchanged. In energy storage and conversion, four components were in positive territory, three lost ground, and one remained unchanged. For renewable electricity and fuels, 11 components were up and six were down from the previous week's close.

CELS' best performer for the week was network infrastructure product provider Echelon Corporation ( ELON), gaining 22.52 percent. Rounding out the top five CELS performers were solar wafer manufacturer ReneSola ( SOL - Get Report), up 15.96 percent; electronic materials provider Rubicon Technology ( RBCN - Get Report), rising 15.56 percent; energy-efficient power conversion equipment maker Power-One ( PWER), gaining 14.58 percent; and demand management firm EnerNOC ( ENOC), up 10.65 percent.

CELS' worst performer last week was solar cell and module maker Canadian Solar ( CSIQ), declining 17.07 percent. Other worst performers included energy storage product developer A123 Systems ( AONE), falling 8.16 percent; utility network provider ESCO Technologies ( ESE), losing 4.39 percent; LED lighting developer Cree ( CREE), down 3.57 percent; and lithium-ion battery maker Ener1 ( HEV), losing 2.73 percent.

QWND - down 2.61 percent last week but 14.79 percent higher 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, nine saw gains last week while 12 lost ground.

QWND's best pure play performer for the week was German renewable energy developer PNE Wind (PNE3), gaining 14.05 percent. Other top pure play performers included turbine equipment provider China High Speed Transmission Equipment Group (0658), up 13.16 percent; energy delivery technology developer American Superconductor ( AMSC), rising 4.24 percent; wind farm owner and operator Infigen Energy ( IFN), gaining 3.08 percent; and wind farm developer China WindPower Group (0182), higher by 2.30 percent.

QWND's worst pure play performers were Greece-based renewable energy developer Terna Energy (TENERGY), declining 13.69 percent; wind turbine manufacturer Nordex (NDX1), down 9.74 percent; wind energy developer Gamesa Corporacion Tecnologica (GAM), losing 8.24 percent; renewable energy developer EDP Renovaveis (EDPR), declining 7.61 percent; and Spain- based renewable energy developer Iberdrola Renovables (IBR), lower by 5.05 percent.

QGRD -- up 1.06 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, 16 of the 21 pure play QGRD components saw gains while the remaining five lost ground.

QGRD's best pure play performer was Echelon Corporation ( ELON), gaining 22.52 percent. Rounding out the top five pure play performers were utility smart grid service provider PowerSecure International ( POWR), up 16.16 percent; Power-One ( PWER), rising 14.58 percent; EnerNOC ( ENOC), 10.65 percent higher; and American Superconductor ( AMSC), growing 4.24 percent.

QGRD's worst performers included electric grid equipment provider Prysmian ( PRY) , losing 5.67 percent; communication network equipment maker RuggedCom ( RCM), down 4.85 percent; ESCO Technologies ( ESE) , retreating 4.39 percent; wire and cable provider General Cable ( BGC), down 1.40 percent; and solar power inverter maker SMA Solar Technology (S92), lower by 0.30 percent.

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