NEW YORK ( TheStreet) -- CHANGE IN RATINGSAgilent Technologies ( A) was initiated with an outperform rating at Credit Suisse. $48 price target. Recent selloff provides an attractive entry point, Credit Suisse said. AmerisourceBergen ( ABC) was downgraded at ISI Group to buy from from strong buy. $53 price target. Valuation call, as the stock is up 23% since October, ISI Group said. Apollo Group ( APOL) was upgraded at Deutsche Bank to hold from sell. $17 price target. Shares have limited downside, Deutsche Bank said. Acuity Brands ( AYI) was initiated at UBS with a buy rating. The company is uniquely positioned as a lighting pure-play in early innings of a recovery, UBS said. Cliffs Natural ( CLF) was downgraded at BMO Capital to market perform. New analyst has a $27 price target. New shares have diluted investors, BMO Capital said. Cloud Peak Energy ( CLD) was downgraded to hold at TheStreet Ratings. Impax Laboratories ( IPXL) was downgraded at Leerink to market perform. The FDA uncovered additional manufacturing deficiencies, creating uncertainty for the stock, Leerink said. Impax Laboratories ( IPXL) was downgraded at Canaccord Genuity to hold from buy. $20 price target. FDA challenges have been expanded, Canaccord Genuity said. Microstrategy ( MSTR) was upgraded at FBR Capital Markets to outperform from market perform. $140 price target. Company can enhance its growth profile and expand margins through new products, FBR Capital Markets said. Texas Roadhouse ( TXRH) was downgraded to hold and estimates were updated at Miller Tabak. Above-peer comps and margin expansion is priced in, Miller Tabak said. EPS estimates were increased. Yahoo! ( YHOO) was upgraded at Cantor Fitzgerald to buy from hold. $26 price target. Core business is stablizing and the company is buying back stock, Cantor Fitzgerald said.