NEW YORK ( TheStreet) -- Shares of Pioneer Southwest Energy Partners (NYSE: PSE) were gapping up Tuesday morning with an open price 4329.4% higher than Friday's closing price. The stock closed at $27.93 Friday and opened today's trading at $1237.12. The average volume for Pioneer Southwest Energy has been 155,200 shares per day over the past 30 days. Pioneer Southwest Energy has a market cap of $891.4 million and is part of the basic materials sector and energy industry. Shares are up 6.8% year to date as of the close of trading on Friday. Pioneer Southwest Energy Partners L.P., together with its subsidiaries, owns and acquires oil and gas assets in the United States. The company has a P/E ratio of 7.6, above the average energy industry P/E ratio of 6.7 and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Pioneer Southwest Energy as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, good cash flow from operations, expanding profit margins, largely solid financial position with reasonable debt levels by most measures and notable return on equity. We feel these strengths outweigh the fact that the company has had sub par growth in net income. You can view the full Pioneer Southwest 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.