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.

QWND's worst pure play performers were wind turbine developer Clipper Windpower ( CWP), declining 15.65 percent; Denmark-based wind energy producer Greentech Energy Systems ( GES), down 9.05; wind farm developer China Longyuan Power Group ( 0916), losing 3.48 percent; German wind turbine maker REpower Systems ( RPW), declining 2.49 percent; and wind energy product and service provider Broadwind Energy ( BWEN), lower by 2.37 percent.

QGRD - up 0.84 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, 12 of the 21 pure play QGRD components saw gains while the remaining nine lost ground.

QGRD's best pure play performer was electricity distribution and automation developer Schneider Electric ( SU), gaining 13.50 percent. Rounding out the top five pure play performers were electrical equipment manufacturer AZZ Incorporated ( AZZ), up 10.93 percent; American Superconductor ( AMSC), rising 5.06 percent; utility service provider Pike Electric ( PIKE), 2.58 percent higher; and renewable energy project integrator SatCon Technology ( SATC), growing 1.69 percent.

QGRD's worst performers included network infrastructure provider Echelon Corporation ( ELON), losing 5.73 percent; communication equipment maker RuggedCom ( RCM), down 4.62 percent; solar inverter maker SMA Solar Technology ( S92), retreating 3.89 percent; distribution transformer manufacturer Jinpan International ( JST), down 3.60 percent; and utility smart grid infrastructure provider PowerSecure International ( POWR), lower by 1.03 percent.

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.

More from Markets

Video: Jim Cramer on the Markets, Tiffany, Micron Technology and Union Pacific

Video: Jim Cramer on the Markets, Tiffany, Micron Technology and Union Pacific

Red Robin Slumps After Earnings Miss

Red Robin Slumps After Earnings Miss

Stocks Trade Lower as Optimism Wanes Over China Trade Talks

Stocks Trade Lower as Optimism Wanes Over China Trade Talks

Comcast Considering All-Cash Bid for Fox as Disney Battle Heads to the Wire

Comcast Considering All-Cash Bid for Fox as Disney Battle Heads to the Wire

Target's Stock Tanks After Q1 Earnings Miss and Slowing Sales

Target's Stock Tanks After Q1 Earnings Miss and Slowing Sales