CardioNet Inc (Nasdaq:BEAT), Cepheid (Nasdaq:CPHD) and OmniVision Technologies Inc (Nasdaq:OVTI) are among the most actively traded companies in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: AgFeed Industries Inc (Nasdaq:FEED), Spectrum Pharmaceuticals Inc (Nasdaq:SPPI), Canadian Solar Inc (Nasdaq:CSIQ), A Power Energy Generation Systems Ltd (Nasdaq:APWR), Solarfun Power Holdings Co Ltd (Nasdaq:SOLF) and STEC Inc (Nasdaq:STEC).

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