The China CleanTech Index, which measures the share-price performance of more than 130 Chinese companies listed on stock exchanges around the world, slumped by 48% in 2011.
Within the overall figure, Chinese wind and solar stocks both fell by about 57% last year, putting them among the worst-performing sub-sectors.
The index fared worse than others against which it is benchmarked. For example, the Wilder Hill New Energy Global Innovation Index (NEX), which tracks global clean-energy stocks, lost 40.2%.
The
