Align Technology, SonicWALL and Healthways lead small-cap percentage gainers

Align Technology Inc. (Nasdaq:ALGN), SonicWALL Inc. (Nasdaq:SNWL) and Healthways Inc. (Nasdaq:HWAY) are among the biggest percentage gainers in Friday's trading among companies with market capitalizations under $1 billion.

Also included among the results: China Sunergy Co Ltd. (Nasdaq:CSUN), CNinsure Inc. (Nasdaq:CISG), Exelixis Inc. (Nasdaq:EXEL), Energy Conversion Devices Inc. (Nasdaq:ENER), optionsXpress Holdings Inc. (Nasdaq:OXPS) and Interactive Brokers Group Inc. (Nasdaq:IBKR).

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