PORTLAND, Ore ( Clean Edge) - Clean Edge and NASDAQ's three benchmark clean-tech stock indices each experienced small gains last week with the NASDAQ Clean Edge Green Energy Index ( CELS)up 1.48 percent, the NASDAQ OMX Clean Edge Global Wind Energy Index ( QWND) gaining 0.80 percent, and the NASDAQ OMX Clean Edge Smart Grid Infrastructure Index ( QGRD)0.84 percent higher from the previous week.The overall market saw similar movement last week - the S&P 500 gained 0.99 percent, NASDAQ grew 0.31 percent and AMEX Oil jumped 4.04 percent. CELS - up 1.48 percent for the week and 37.74 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. In the advanced materials sector, four component companies were in positive territory with the remaining one down. Energy intelligence had 14 components up and nine down. In energy storage and conversion, one component was in positive territory and seven lost ground. For renewable electricity and fuels, 13 components were up and four were down from the previous week's close. CELS' best performer for the week was electric motor developer UQM Technologies ( UQM), gaining 16.99 percent. Rounding out the top five CELS performers were Chinese PV solar cell maker JA Solar Holdings ( JASO), up 12.18 percent; Chinese PV product maker Solarfun Power Holdings ( SOLF), rising 11.06 percent; electronic materials provider Rubicon Technology ( RBCN), gaining 9.26 percent; and solar cell and module maker Canadian Solar ( CSIQ), up 9.21 percent. CELS' worst performer last week was fuel cell maker Ballard Power Systems ( BLDP), declining 8.97 percent. Other worst performers included energy storage product developer A123 Systems ( AONE), falling 7.82 percent; solar panel maker Evergreen Solar ( ESLR)(ESLR), losing 6.61 percent; solar wafer manufacturer LDK Solar ( LDK), down 6.56 percent; and lithium-ion battery developer Ener1 ( HEV), losing 5.98 percent. QWND - up 0.80 percent last week and 23.38 percent higher 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 21 pure play components, 10 saw gains last week while eleven lost ground. QWND's best pure play performer for the week was wind farm owner and operator Japan Wind Development Co. ( 2766), gaining 5.07 percent. Other top pure play performers included energy delivery technology developer American Superconductor ( AMSC), up 5.06 percent; advanced composite material developer Gurit Holding ( GUR)(GUR), rising 2.81 percent; wind farm operator Infigen Energy ( IFN), gaining 2.63 percent; and renewable energy developer EDP Renovaveis ( EPDR), higher by 5.24 percent.