Petroleum Development, Cornerstone Therapeutics and Universal Display lead small-cap percentage losers

Petroleum Development Corp. (Nasdaq:PETD), Cornerstone Therapeutics Inc. (Nasdaq:CRTX) and Universal Display Corp. (Nasdaq:PANL) are among the biggest percentage losers in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: RINO International Corp. (Nasdaq:RINO), Zoltek Companies Inc. (Nasdaq:ZOLT), Providence Service Corp. (Nasdaq:PRSC), Parexel International Corporation (Nasdaq:PRXL), Clear Channel Outdoor Holdings Inc. (Nasdaq:CCO) and Colonial Bankshares Inc. (Nasdaq:COBK).

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