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 3.39 percent, the NASDAQ OMX Clean Edge Global Wind Energy Index(QWND) losing 0.64 percent, and the NASDAQ OMX Clean Edge Smart Grid Infrastructure Index(QGRD) 0.19 percent higher from the previous week.The overall market also saw mixed movement last week - the S&P 500 lost 0.19 percent, NASDAQ grew 1.11 percent and AMEX Oil retreated 0.70 percent.
QWND's worst pure play performers were wind farm operator China Longyuan Power Group (0916), declining 8.06 percent; Greece-based renewable energy developer Terna Energy (TENERGY), down 6.90 percent; wind power generator Japan Wind Development Co. (2766), losing 6.14 percent; renewable energy developer EDP Renovaveis (EDPR), declining 3.34 percent; and wind farm owner and operator China WindPower Group (0182), lower by 3.33 percent. QGRD - up 0.19 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 Power-One, gaining 15.68 percent. Rounding out the top five pure play performers were communication equipment maker RCM ( RCM), up 7.16 percent; renewable energy project integrator SatCon Technology ( SATC), rising 5.68 percent; American Superconductor ( AMSC), 4.97 percent higher; and electric infrastructure contractor MYR Group ( MYRG), growing 4.53 percent. QGRD's worst performers included electric grid equipment provider Prysmian ( PRY), losing 6.26 percent; electric management and automation technology developer Schneider Electric ( SU), down 5.69 percent; electric infrastructure contractor Quanta Services ( PWR), retreating 4.97 percent; energy storage technology developer NGK Insulators (53330), down 4.01 percent; and solar power inverter maker SMA Solar Technology (S92), lower by 1.69 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 indices - including methodology, components, historical performance, financial products and licensing information, please visit www.cleanedge.com/ceindex.