NEW YORK ( TheStreet) -- Shares of Rex Energy Corporation (Nasdaq: REXX) were gapping up Wednesday morning with an open price 11% higher than Tuesday's closing price. The stock closed at $14.23 Tuesday and opened today's trading at $15.80. The average volume for Rex Energy has been 1.1 million shares per day over the past 30 days. Rex Energy has a market cap of $625.1 million and is part of the basic materials sector and energy industry. Shares are up 4.2% year to date as of the close of trading on Tuesday. Rex Energy Corporation operates as an independent oil and gas company in the Appalachian, Illinois, and Denver-Julesburg Basins. TheStreet Ratings rates Rex Energy as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, solid stock price performance and impressive record of earnings per share growth. However, as a counter to these strengths, we find that the company's return on equity has been disappointing. You can view the full Rex Energy Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping up? Get free SMS text alerts sent to you when the action happens by texting UP to 95370 or select from multiple alert options.