Virtual Radiologic Corp. (Nasdaq:VRAD), BankAtlantic Bancorp Inc. (Nasdaq:BBX) and FirstFed Financial Corp. (Nasdaq:FED) are among the biggest percentage losers in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Cal-Maine Foods Inc. (Nasdaq:CALM), A Power Energy Generation Systems Ltd. (Nasdaq:APWR), James River Coal Co. (Nasdaq:JRCC), Canadian Solar Inc (Nasdaq:CSIQ), Maguire Properties REIT (Nasdaq:MPG) and WuXi PharmaTech Cayman Inc. (Nasdaq:WX).

Here are the biggest percentage losers among small caps:

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