DryShips Inc. (Nasdaq:DRYS), TBS International Ltd. (Nasdaq:TBSI) and AsiaInfo Holdings Inc. (Nasdaq:ASIA) are among the most actively traded companies in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Arkansas Best Corp. (Nasdaq:ABFS), YRC Worldwide Inc. (Nasdaq:YRCW), Allos Therapeutics Inc. (Nasdaq:ALTH), Questcor Pharmaceuticals Inc. (Nasdaq:QCOR), Almost Family Inc. (Nasdaq:AFAM) and PetMed Express Inc. (Nasdaq:PETS).

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