A Power Energy Generation Systems Ltd. (Nasdaq:APWR), Force Protection Inc. (Nasdaq:FRPT) and BioDelivery Sciences International Inc. (Nasdaq:BDSI) are among the most actively traded companies in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: JA Solar Holdings Co Ltd. (Nasdaq:JASO), Spectrum Pharmaceuticals In.c (Nasdaq:SPPI), AgFeed Industries Inc. (Nasdaq:FEED), Eagle Bulk Shipping Inc. (Nasdaq:EGLE), Solarfun Power Holdings Co Ltd. (Nasdaq:SOLF) and Century Aluminum Co. (Nasdaq:CENX).

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