Here is a list of this morning’s top companies upgrades, downgrades, and initiations by brokerage firms. Upgrades: Citigroup (C) upgraded to Buy at Goldman Exxon Mobil (XOM) upgraded to Outperform at RBC Capital First Solar (FSLR) upgraded to Buy at Auriga; price target $138 Intel (INTC) upgraded to Buy at ThinkEquity; price target $25 Leap Wireless International (LEAP) upgraded to [...]