NEW YORK ( TheStreet) -- DryShips (Nasdaq: DRYS) is trading at unusually high volume Tuesday with 18.4 million shares changing hands. It is currently at four times its average daily volume and trading down 8 cents (-2.7%) at $2.73 as of 2:55 p.m. ET. DryShips has a market cap of $898.6 million and is part of the services sector and transportation industry. Shares are up 20.3% year to date as of the close of trading on Monday. DryShips, Inc., through its subsidiaries, engages in the ownership and operation of drybulk carriers and drilling rigs that operate worldwide. The company has a P/E ratio of 21.9, above the average transportation industry P/E ratio of 4.7 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates DryShips as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, generally weak debt management, disappointing return on equity, generally disappointing historical performance in the stock itself and feeble growth in its earnings per share. You can view the full DryShips 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.