Clean Edge and Nasdaq's three benchmark clean-tech stock indices moved higher last week with the Nasdaq Clean Edge Green Index ( CELS up 1.32%, the Nasdaq OMX Clean Edge Global Wind Energy Index ( QWND growing 2.95%, and the Nasdaq OMX Clean Edge Smart Grid Infrastructure Index ( QGRD 3.17% higher from the previous week.

CELS - up 1.32% for the week and 2.11% 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 renewal electricity general and renewal fuels.

Of the 51 total component securities, 29 had gains and 22 losses.

CELS' best performer of the week was chipmaker Microsemi ( MSCC, gaining 15.72%.

Rounding out the top five CELS performers were energy delivery technology developer American Superconductor ( AMSC - Get Report), up 15.67%; Broadwind Energy ( BWEN - Get Report), higher by 11.56%; power management device maker Power-One ( PWER, up 10.31%; and biomaterial developer Metabolix ( MBLX, 10.11% higher.

CELS' worst performer was solar PV product maker Energy Conversion Devices ( ENER, declining 9.06%.

Other poor performers included vertically integrated solar PV manufacturer Solarfun Power Holdings ( SOLF, losing 7.77%; electronic materials provider Rubican Technology ( RBCN, down 6.97%; thin-film solar manufacturer First Solar ( FSLR, retreating 6.53%; and ethanol producer Green Plains Renewable Energy ( GPRE, down 5.92%.

Other top pure play performers included renewable energy developer EDF Energies Nouvelles (EEN), gaining 8.73%; wind farm developer China Longyuan Power Group (0916), rising 5.97%; wind energy project developer and operator Theolia (TEO), growing 4.03%; and wind turbine manufacturer Nordex (NDX1), 3.98% higher for the week.

QWND's worst pure play performers were wind power station developer and owner Japan Wind Development (2766), losing 3.79%; wind project operator Infigen Energy ( IFN, down 1.43%; wind turbine manufacturer Vestas Wind Systems ( VWS, losing 1.42%; wind energy company China WindPower Group (0182), declining 1.14%; and renewable energy developer Gamesa Corporacion Tecnologica (GAM), falling 0.98% from the previous week.

QGRD -- 3.17 % higher 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 22 pure play components, 15 experienced positive movement while seven saw losses.

QGRD's best pure play performer was American Superconductor ( AMSC - Get Report), up 15.67% for the week.

Rounding out the top five pure play performers were power management device maker Power-One, gaining 10.31 %; specialty contracting firm Quanta Services ( PWR, rising 5.21%; smart grid service provider PowerSecure International ( POWR, 5.10% higher; and smart meter manufacturer Itron ( ITRI - Get Report), higher by 4.33%.

QGRD's worst performers included utility cable and wire provider General Cable Corporation ( GBC, losing 8.77%; electrical equipment manufacturer AZZ ( AZZ, down 3.19%; demand energy management firm Comverge ( COMV, down 2%; solar inverter maker SMA Solar Technology (S92), lower by 1.57 %; and demand management service provider EnerNOC ( ENOC (ENOC), falling 1.09%.

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.

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.