NEW YORK ( TheStreet) - Clean Edge and Nasdaq's three benchmark clean-tech stock indexes saw mild movement last week, as the Nasdaq Clean Edge Green Energy Index ( CELS) was down 0.62 percent, the Nasdaq OMX Clean Edge Global Wind Energy Index ( QWND) lower by 1.43 percent, and the NASDAQ OMX Clean Edge Smart Grid Infrastructure Index ( QGRD) gained 1.14 percent from the previous week.The overall market was also calm. The S&P 500 lost 0.55 percent and Nasdaq was down 0.10 percent - while AMEX Oil was 0.56 percent higher from the previous week. CELS, down 0.62 percent for the week and 15.86 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. Of the 51 total component securities, 18 experienced gains, 32 lost ground, and one remained unchanged. CELS' best performer for the week was demand management firm EnerNOC ( ENOC), gaining 11.90 percent. Rounding out the top five CELS performers were semiconductor maker Fairchild Semiconductor ( FCS), up 8.44 percent; power management device maker O2Micro International ( OIIM), higher by 6.97 percent; power management semiconductor manufacturer International Rectifier Corporation ( IRF), up 4.65 percent; and electric vehicle manufacturer Tesla Motors ( TSLA), 4.21 percent higher for the week. CELS' worst performer last week was Chinese solar cell and module maker Trina Solar ( TSL), declining 8.86 percent. Other worst performers included energy storage technology developer Ener1 ( HEV), losing 8.77 percent; Chinese solar product manufacturer Suntech Power ( STP), down 7.97 percent; biomaterial developer Metabolix ( MBLX), retreating 7.16 percent; and network infrastructure product maker Echelon Corporation ( ELON), 7.13 percent lower for the week. QWND, 1.43 percent lower last week and 27.66 percent lower 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 18 pure play components, four saw gains, 11 experienced losses, and threeended the week unchanged. QWND's best pure play performer for the week was wind energy project developer China Windpower Group (0182), up 2.70 percent. Other top pure play performers included German wind turbine maker REpower Systems ( RPW), gaining 1.81 percent; renewable energy project developer Gamesa Corporacion Tecnologica ( GAM), rising 1.44 percent; and energy delivery technology developer American Superconductor ( AMSC), up 0.33 percent for the week.