NEW YORK ( TheStreet) -- Cal Dive International (NYSE: DVR) is trading at unusually high volume Wednesday with 3.1 million shares changing hands. It is currently at four times its average daily volume and trading down 86 cents (-11.5%) at $6.60 as of 3:41 p.m. ET. Cal Dive International has a market cap of $724 million and is part of the basic materials sector and energy industry. Shares are up 31.6% year to date as of the close of trading on Tuesday. Cal Dive International, Inc., a marine contracting company, provides manned diving, pipelay and pipe burial, platform installation, and platform salvage services to the offshore oil and natural gas industry. TheStreet Ratings rates Cal Dive International as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity, poor profit margins, weak operating cash flow and feeble growth in its earnings per share. You can view the full Cal Dive International Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.