Pioneer Southwest Energy Partners (NYSE:PSE) was upgraded from Underperform to Sector Perform at RBC Capital today. The stock closed yesterday at $26.88 on volume of 81,000 shares, above average daily volume of 70,000.Pioneer Southwest Energy Partners, L.P. seeks to own and acquire developed oil and gas properties.Potential upside of 5.7% exists for Pioneer Southwest Energy Partners, based on a current level of $26.88 and analysts’ average consensus price target of $28.40. The stock should find initial resistance at its 50-day moving average (MA) of $27.05 and further resistance at its 200-day MA of $27.49.Over the past year, Pioneer Southwest Energy Partners has traded in a range of $21.34 to $35.85 and closed yesterday at $26.88, 26% above that low. In the last five trading sessions, the 50-day moving average (MA) has remained constant while the 200-day MA has slid 0.3%.