Editor's Note: Green and red arrows refer to intraday stock price movement.NEW YORK ( TheStreet) -- CHANGE IN RATINGS The AES Corp. ( AES) was upgraded at Citigroup to Buy from Hold as management tends to sharpen its international development, Citigroup said. Price target raised to $16 from $14. Gap ( GPS) was downgraded at Piper Jaffray from Overweight to Neutral. $19 price target. Margins remain under pressure, as the company is facing higher costs, Piper Jaffray said. Intuit ( INTU) was downgraded at Canaccord Genuity from Buy to Hold. Valuation call, based on a $57 price target, Canaccord said. Knight Transportation ( KNX) was downgraded at Wells Fargo from Outperform to Market Perform. Estimates were also cut, as the company is facing cost headwinds, Wells Fargo said. Leap Wireless ( LEAP) was downgraded at JP Morgan from Overweight to Neutral. $16 price target. Company is facing slower business, as usual, in the summer, JP Morgan said. Patterson Dental ( PDCO) was downgraded at UBS from Buy to Neutral. $37 price target. Valuation call, as the stock has outperformed since January, UBS said. Sprint Nextel ( S) was upgraded at Piper Jaffray to Overweight from Neutral. Operational trends are improving, Piper Jaffray said. $6.50 price target. Tyson Foods ( TSN) was upgraded at Keybanc from Hold to Buy. $23 price target. Earnings have yet to peak, Keybanc said. WebMD ( WBMD) was upgraded at Goldman Sachs to Buy. $60 price target. The stock is down 20% on regulatory confusion, which should pass, Goldman said. End of report.