Goldman Sachs Downgrades NuStar Energy, NuStar GP Holdings By: Benzinga via Benzinga November 03, 2014 at 12:01 PM EST Here are a couple key takeaways on Goldman Sachs’ downgrade of NuStar Energy L.P. (NYSE: NS) and Nustar GP Holdings, LLC (NYSE: ... Read More >> Related Stocks: Navsight Holdings Inc Cl A Nustar Energy LP