NEW YORK ( TheStreet) -- CHANGE IN RATINGSAdobe ( ADBE)upgraded to buy at TheStreet Ratings. Ancestry.com ( ACOM) downgraded at Morgan Keegan from Outperform to Market Perform. Valuation call, based on a $27 price target. TD Ameritrade ( AMTD) upgraded at Deutsche from Hold to Buy, Deutsche Bank said. $18 price target. Brokerage stocks can outperform the exchanges in the near term. Acuity Brands ( AYI) downgraded at Wedbush to Underperform from Neutral, Wedbush said. $30 price target. Unrealistic market expectations. Cerner ( CERN) upgraded at Deutsche from Hold to Buy, Deutsche Bank said. $71.50 price target. Company is showing strong bookings growth. CME Group ( CME) downgraded at J.P. Morgan to Neutral from Outperform, J.P. Morgan said. $270 price target. Risk of underperforming as estimates fall. Encana ( ECA) downgraded at BMO from Outperform to Market Perform, BMO Capital Markets said. $20 price target. Disappointing winter heating season and weaker outlook for natural gas prices. General Dynamics ( GD) rated new Buy at Sterne Agee. $82 price target. Gulfstream business is strong and the company is buying back stock. Corning ( GLW) rated new Hold at Keybanc. Company lacks near-term catalysts. Goldman Sachs ( GS) downgraded at Wells to Market Perform, Wells Fargo said. Capital market trends remain challenging. The Intercontinental Exchange ( ICE) downgraded at JP Morgan from Overweight to Neutral, JP Morgan said. $133 price target. Valuation call. Intel ( INTC) downgraded at Sterne Agee from Buy to Neutral, Sterne Agee said. $26 price target. Company faces headwinds in the core PC business. Illinois Tool Works ( ITW) downgraded at Credit Suisse from Outperform to Neutral, Credit Suisse said. Company lacks near-term catalysts. $53 price target. Invesco Mortgage Capital ( IVR) downgraded at Jefferies to Hold from Buy, Jefferies said. $14 price target. Low rate environment remains problematic. Legg Mason ( LM) downgraded at Deutsche from Buy to Hold, Deutsche Bank said. $27 price target. Lockheed Martin ( LMT) rated new Neutral at Sterne Agee. Defense spending will likely continue to slow. Macerich ( MAC) upgraded at UBS from Neutral to Buy, UBS said. $55 price target. High quality mall REIT with attractive valuation. Universal Display ( PANL) rated new Buy at Keybanc. $45 price target. Company can post solid earnings growth over the next several years.