NEW YORK ( TheStreet) -- CHANGE IN RATINGSAccenture ( ACN) was upgraded to Outperform at Wells Fargo. Visibility is improving, and business fundamentals appear to have reached an inflection point. Archer-Daniels Midland ( ADM) was downgraded to Market Perform at BMO Capital. Valuation call, based on a $36 price target. Beacon Roofing ( BECN) was downgraded from Outperform to Neutral at Robert Baird. $16 price target. Shingle pricing has turned negative. ConocoPhillips ( COP) was downgraded to Underweight at Morgan Stanley. Valuation call, based on a $56 price target. Deere ( DE) was downgraded to Market Perform at Wells Fargo. Company is not likely to raise guidance above current consensus expectations. Amdocs ( DOX) was started with a Hold rating at ThinkEquity. $30 price target. Future growth will most likely be driven by acquisitions. Idacorp ( IDA) was upgraded from Hold to Buy at Keybanc. $38.50 price target. Two tax deductions will benefit equity value. Limited Brands ( LTD) was downgraded to Sell at Goldman Sachs. $24 price target. Company faces earnings headwinds in 2011. Norfolk Southern ( NSC) was downgraded to Market Perform at Wells Fargo. Valuation call, as coal demand could wane. Rubicon Technology ( RBCN) was initiated with a Sell rating at Merriman, Curhan Ford. Supply has caught up to demand in LCD lighting. The Hanover Insurance Group ( THG) was downgraded to Equal Weight from Overweight at Barclays. Less earnings power and reduced ROE improvement, Barclays said. Price target cut to $46 from $49. Walgreen ( WAG) was upgraded from Equal-Weight to Overweight at Morgan Stanley. $40 price target. Company faces easy comparisons for the flu season. Wright Medical ( WMGI) was downgraded from Outperform to Neutral at Robert Baird. $17 price target. Company could struggle to achieve consensus earnings expectations. Xilinx ( XLNX) was downgraded from Neutral to Sell at Goldman Sachs. Estimates were also cut, as cyclical pressures could hurt earnings. $22 price target.