Progenics Pharmaceuticals, Inc. (Nasdaq: PGNX), DivX, Inc. (Nasdaq: DIVX) and Gulfport Energy Corp. (Nasdaq: GPOR) are among the biggest percentage losers in Tuesday's trading among companies with market capitalizations under $750 million.

Helicos BioSciences Corp. (Nasdaq: HLCS), Community Shores Bank Corp. (Nasdaq: CSHB) and E Com Ventures, Inc. (Nasdaq: ECMV) are also among the top small-cap percentage losers.

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