Citi Prefers Nustar Energy Over NuStar Holdings, Upgrades Both To Buy By: Benzinga via Benzinga August 12, 2016 at 09:48 AM EDT Citi upgraded both NuStar Energy L.P. (NYSE: NS) and NuStar GP Holdings, LLC (NYSE: NSH) to Buy from Neutral, primarily driven by ... Read More >> Related Stocks: Navsight Holdings Inc Cl A Nustar Energy LP