QGRD -- down 9.08% 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, two of the 21 pure play QGRD components saw gains while the remaining 19 lost ground.

QGRD's best pure play performer was renewable energy inverter maker SMA Solar Technology (S92), gaining 4.86%. Rounding out the top five pure play performers were wire and cable provider General Cable ( BGC), up 1.89%; Comverge ( COMV), down 2.20%; electric utility contractor Quanta Services ( PWR), 2.29% lower; and communication equipment provider RuggedCom ( RCM), losing 2.91%.

QGRD's worst performers included energy management service provider PowerSecure International ( POWR), losing 21.94%; transformer manufacturer Jinpan International ( JST), down 14.87%; American Superconductor ( AMSC), retreating 14.15%; renewable energy project integrator SATC, down 13.88%; and network infrastructure product maker Echelon Corporation ( ELON), lower by 12.79%.

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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