CPI International Inc. (Nasdaq:CPII), Janus Capital Group Inc. (Nasdaq:JNS) and Gulf Island Fabrication Inc. (Nasdaq:GIFI) are among the biggest percentage losers in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: BancTrust Financial Group Inc. (Nasdaq:BTFG), Willbros Group Inc. (Nasdaq:WG), Textainer Group Holdings Ltd (Nasdaq:TGH), James River Coal Co. (Nasdaq:JRCC), Walter Industries Inc. (Nasdaq:WLT) and 1st Source Corp. (Nasdaq:SRCE).

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