NEW YORK ( TheStreet) -- CHANGE IN RATINGS Bank of America ( BAC) was upgraded at Guggenheim from Neutral to Buy. $11 price target. Expect favorable first-quarter earnings, Guggenheim said. Ball ( BLL) was initiated with a Hold rating at Keybanc. The stock is trading above its historical average valuation, Keybanc said. Fidelity National ( FIS)was initiated with a Market Perform rating at Wells Fargo. Valuation call. Endocyte ( ECYT) was initiated with a Sell rating at TheStreet Ratings. Gamestop ( GME) was downgraded at Needham from Buy to Hold. Slower retail sales could hurt the company, Needham said. JC Penney ( JCP) was initiated with a Neutral rating at UBS. $36 price target. Cost cuts should limit stock downside in the meantime, UBS said. Nordstrom ( JWN) was initiated with a Buy rating at UBS. $63 price target. Hidden value supports a premium valuation, UBS said. Kohl's ( KSS) was initiated with a Neutral rating at UBS. $53 price target. Growing pains still hurt, but capital strategy could change that, UBS said. Macy's ( M) was initiated with a Neutral rating at UBS. $43 price target. SSS outperformance should continue, UBS said. NetApp ( NTAP) was downgraded at FBN Securities from Outperform to Sector Perform. $45 price target. Channel checks suggest weaker sales, FBN said. Pan American Silver Corp. ( PAAS) was downgraded to Hold at TheStreet Ratings. Saks ( SKS) was initiated with a Neutral rating at UBS. $12 price target. Fixing legacy real estate issues key to driving fundamentals higher, UBS said. Silicon Labs ( SLAB) was upgraded at Wunderlich from Hold to Buy. $50 price target. Selloff has created an attractive entry point, Wunderlich said. Sterling Financial ( STSA) was initiated with a Market Perform rating at Keefe, Bruyette & Woods. Valuation call, based on a $19 price target, Keefe, Bruyette & Woods said. Viropharma ( VPHM) was downgraded to Hold at Brean Murray. Vancocin will soon face heavy generic competition, Brean Murray said. Yelp ( YELP) was initiated with a Neutral rating at Citigroup. $28 price target. Very robust valuation offsets significant market opportunity, Citigroup said. Yelp was initiated with a Neutral rating at Goldman Sachs. $26 price target. Business model is still in its early stages, Goldman said. Yelp was initiated with a Perform rating at Oppenheimer. $23 price target. Key metrics have material upside, Oppenheimer said.