QWND's worst pure play performers were wind farm owner and operator Terna Energy (TENERGY), declining 14.22%; Spain-based renewable energy developer Iberdrola Renovables (IBR), down 3.35%; wind turbine manufacturer Clipper Windpower (CWP), losing 1.20%; wind power producer China Longyuan Power Group (0916), declining 0.38%; and wind farm developer Greentech Energy Systems (GES), unchanged for the week.

QGRD -- up 5.92% 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 American Superconductor, gaining 23.59%. Rounding out the top five pure play performers were energy management service provider PowerSecure International ( POWR), up 14.33%; utility industry contractor Quanta Services (PWR), up 14.03%; electrical infrastructure specialty contractor MYR Group ( MYRG), 13.44% higher; and demand energy management company EnerNOC ( ENOC), gaining 11.89%.

QGRD's worst performers included solar inverter maker SMA Solar Technology (S92), losing 8.19%; Comverge, down 2.71%; communication network equipment provider RuggedCom ( RCM), retreating 2.65%; Italy-based utility cable provider Prysmian ( PRY) , down 1.86%; and utility network provider ESCO Technologies ( ESE), lower by 0.10%.
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.

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