Citing Oil Fears, Goldman Downgrades HollyFrontier To Sell By: Benzinga via Benzinga March 23, 2016 at 09:14 AM EDT Goldman Sachs downgraded HollyFrontier Corp (NYSE: HFC) to Sell from Neutral on crude spreads, valuation and consensus EPS risk. ... Read More >> Related Stocks: Hollyfrontier Corp Marathon Petroleum PBF Energy Inc Valero Energy