PORTLAND, Ore. (Clean Edge) -- Each of Clean Edge and NASDAQ's three benchmark clean-tech stock indexes ended last week down with the Clean Edge Green Energy Index (CELS) losing 3.10 percent, the OMX Clean Edge Global Wind Energy Index (QWND) falling 2.48 percent, and OMX Clean Edge Smart Grid Infrastructure Index (QGRD), down 2.23 percent from the previous week.
The overall market also ended the week down slightly: the S&P 500 lost 0.42 percent, NASDAQ fell 0.25 percent and AMEX Oil ended the week 2.19 percent lower.
CELS, which was down 3.10 percent for the week but 54.16 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, all five component companies were in negative territory. Energy intelligence had six components up and 14 down. In energy storage and conversion, four components were in positive territory and six lost ground. For renewable electricity and fuels, one component was up while the remaining 14 saw losses from the previous week's close.
CELS' best performer for the week was stationary fuel cell developer FuelCell Energy (FCEL), gaining 6.44 percent.
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