Medarex Inc. (Nasdaq:MEDX), Smith & Wesson Holding Corp. (Nasdaq:SWHC) and A Power Energy Generation Systems Ltd. (Nasdaq:APWR) are among the most actively traded companies in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Spectrum Pharmaceuticals Inc.(Nasdaq:SPPI), Century Aluminum Co. (Nasdaq:CENX), Solarfun Power Holdings Co Ltd. (Nasdaq:SOLF), Matrixx Initiatives (Nasdaq:MTXX), Focus Media Holding Ltd. (Nasdaq:FMCN) and Monro Muffler Brake Inc. (Nasdaq:MNRO).

For access to the full article, you must be a registered member - it's FREE.