NEW YORK ( TheStreet) -- Shares of Duncan Energy Partners (NYSE: DEP) were gapping up Wednesday morning with an open price 23.9% higher than Tuesday's closing price. The stock closed at $32.56 Tuesday and opened today's trading at $40.35. The average volume for Duncan Energy has been 75,700 shares per day over the past 30 days. Duncan Energy has a market cap of $1.9 billion and is part of the basic materials sector and energy industry. Shares are up 1.5% year to date as of the close of trading on Tuesday. Duncan Energy Partners L.P. engages in gathering, transporting, marketing, and storing natural gas, as well as in transporting and storing natural gas liquids (NGLs) and petrochemicals in the United States. The company has a P/E ratio of 21.1, below the average energy industry P/E ratio of 21.4 and below the S&P 500 P/E ratio of 23.2. TheStreet Ratings rates Duncan Energy as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, good cash flow from operations, solid stock price performance, growth in earnings per share and increase in net income. We feel these strengths outweigh the fact that the company shows low profit margins. You can view the full Duncan Energy Ratings Report. Get more investment ideas from our investment research center.