NEW YORK ( TheStreet) -- CHANGE IN RATINGSResearch In Motion ( BBRY) was upgraded at Morgan Stanley from underweight to overweight. $22 price target. Blackberry 10 should boost overall pricing and margins, Morgan Stanley said. Walgreen ( WAG) was upgraded at JP Morgan to to overweight from neutral. $55 price target. Transforming the global supply chain with new strategic relationship, JP Morgan said. Adobe Systems ( ADBE) downgraded at Stifel from buy to hold. Stock appears fully valued at current levels, Stifel Nicolaus said. Zynga ( ZNGA)downgraded at BofA Merrill to neutral from buy. $3.90 price target. Risk reward less compelling, Bank of America Merrill Lynch said. Symantec ( SYMC) downgraded at Oppenheimer from outperform to perform. Valuation call, as the stock is up 66% over the past 8 months, Oppenheimer said. Cimarex Energy ( XEC) was downgraded at FBR from outperform to market pPerform. Valuation call, based on a $72 price target, FBR Capital Markets said. Emergent BioSolutions ( EBS) was downgraded to hold at TheStreet Ratings. AmerisourceBergen ( ABC) was upgraded at Citi to buy from neutral. The deal with Walgreens will be transformational, increasing international reach and adding purchasing power, said Citigroup. Price target is $62. AmerisourceBergen was downgraded at ISI from buy to neutral. Valuation call, based on a $54 price target, ISI Group said. Cardinal Health ( CAH) downgraded at Citi to neutral from buy. The loss of the contract with Walgreens will limit earnings growth, said Citigroup. Price target is $43. Cardinal Health downgraded at ISI from strong buy to buy. $48.50 price target. Loss of WAG deal will cut into earnings, ISI Group said. Ocwen ( OCN) was downgraded to hold at TheStreet Ratings. VMware ( VMW) is rated new sector perform at FBN. $85 price target. Expect license growth to accelerate this year, FBN Securities said. Cimarex Energy ( XEC) downgraded at FBR from outperform to market perform. Valuation call, based on a $72 price target, FBR Capital Markets said. Williams Partners ( WPZ) initiated at UBS with a neutral rating. While the company is a dominant midstream provider, commodity sensitivity remains, said UBS. Price target is $50. STOCK COMMENTS/EPS CHANGES Apple ( AAPL) estimates, target cut at Canaccord Genuity. Shares are now seen reaching $600. Estimates were also reduced, as the iPhone could lose market share this year, according to Canaccord Genuity.. Buy rating. Cobalt International ( CIE) price target increased at UBS to $36. The appraisal of the Shenandoah well was impressive and the North Platt oil pay was above pre-drill estimates, said UBS.