NEW YORK ( TheStreet) -- CHANGE IN RATINGS Archer-Daniels Midland was upgraded at J.P. Morgan to neutral from underweight. Company should benefit from lower corn prices, J.P. Morgan said. AIMCO ( AIV) was downgraded at UBS to neutral from buy and given a $32 price target. 2013 same-store sales are unlikely to be raised, and the portfolio is exposed to rising cap rates, UBS said. Advanced Micro Devices ( AMD) was downgraded at Credit Suisse to underperform from neutral. $3 price target. Profitability continues to be challenging, Credit Suisse said. Advanced Micro Devices was downgraded at Morgan Stanley to underweight. $2.50 price target. Console margins appear to be lower than previously thought, Morgan Stanley said. ATHN) was downgraded at Lazard Capital Markets to neutral from buy. Valuation call, as the stock has been strong of late, Lazard Capital Markets said. Cepheid ( CPHD) was upgraded at Piper Jaffray to overweight from neutral. Valuation call, based on a $43 price target, Piper Jaffray said. CYS Investments ( CYS) was downgraded to sell at TheStreet Ratings. Fairchild Semiconductor ( FCS) was downgraded at FBR Capital Markets to market perform from outperform. $14 price target. Company lowered its guidance, FBR Capital Markets said. FDO) was initiated with a market perform rating at FBR Capital Markets. $64 price target. Consensus estimates appear to be aggressive, FBR Capital Markets said. Piper Jaffray ( PJC) was downgraded to hold at TheStreet Ratings. ICU Medical ( ICUI) was downgraded at Piper Jaffray to neutral from overweight. $71 price target. Company missed expectations this quarter, but remains a possible takeover target, Piper Jaffray said. International Game ( IGT) was downgraded at Credit Suisse to underperform from neutral. $16 price target. Core business remains challenged, Credit Suisse said. Intuitive Surgical ( ISRG) was downgraded at JMP Securities to underperform from market perform. $275 price target. Company has received an FDA warning letter and will see no additional reimbursements in Japan next year, JMP Securities said. STX) was upgraded at Citigroup to neutral from sell. $49 price target. Industry should see higher profitability, Citigroup said.