Sunoco LP (SUN) closed at $53.50 in the latest trading session, marking a +0.36% move from the prior day. The stock's change was less than the S&P 500's daily gain of 0.54%. Elsewhere, the Dow gained 0.72%, while the tech-heavy Nasdaq added 0.65%.Heading into today, shares of the master limited partnership had gained 2.32% over the past month, outpacing the Oils-Energy sector's loss of 3.91% and lagging the S&P 500's gain of 4.86% in that time.The investment community will be closely monitoring the performa ...