Dell traded more than 4-times its 10-day average volume on Wednesday, after the company missed earnings' estimates and issued downbeat revenue guidance for the current quarter.Earlier in the session, the stock was down as much as 18 percent, its worst one-day drop since November 2000. Here's a look at other stocks in the S&P 1,500 index displaying unusual volume.

Follow Giovanny Moreano on Twitter. bythenumbers.cnbc.com

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