NEW YORK ( TheStreet) -- Hornbeck Offshore Services (NYSE: HOS) is trading at unusually high volume Thursday with 2.5 million shares changing hands. It is currently at four times its average daily volume and trading up $1.32 (+5.5%) at $25.33 as of 3:27 p.m. ET. Hornbeck Offshore Services has a market cap of $644.3 million and is part of the services sector and transportation industry. Shares are up 15% year to date as of the close of trading on Wednesday. Hornbeck Offshore Services, Inc., through its subsidiaries, operates offshore supply vessels (OSVs), multi-purpose support vessels, and a shore-base to provide logistics support and specialty services to the offshore oil and gas exploration and production industry. The company has a P/E ratio of 15.3, equal to the average transportation industry P/E ratio and below the S&P 500 P/E ratio of 23.3. TheStreet Ratings rates Hornbeck Offshore Services as a hold. The company's strengths can be seen in multiple areas, such as its increase in net income, revenue growth and attractive valuation levels. However, as a counter to these strengths, we also find weaknesses including disappointing return on equity and feeble growth in the company's earnings per share. You can view the full Hornbeck Offshore Services Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.