Citigroup Upgrades Four, Downgrades One In Metals & Energy Sector By: Benzinga via Benzinga October 20, 2014 at 15:25 PM EDT In a note Monday morning, analyst Brian Yu from Citigroup upgraded four names in the mining and energy space while downgrading one. ... Read More >> Related Stocks: Alliance Holdings GP, L.P. - Common Units Representing Limited Partner Interests CONSOL Energy Freeport-McMoRan Newmont Mining Noble Corp