Editor's Note: Green and red arrows refer to intraday stock price movement. NEW YORK ( TheStreet) -- CHANGE IN RATINGS Amazon.com ( AMZN - Get Report) rated new Overweight at JPMorgan. $251 price target. Further upside into the seasonally stronger back half. Clean Energy ( CLNE - Get Report) upgraded at BofA/Merrill from Underperform to Buy. $19 price target. CHK's investment into infrastructure should help boost LNG demand. Carpenter Technology ( CRS) downgraded at Keybanc from Buy to Hold. Valuation call. Quest Diagnostics ( DGX - Get Report) rated new Neutral at JPMorgan. $64 price target. Current valuation already reflects improving healthcare trends. eBay ( EBAY - Get Report) rated new Neutral at JPMorgan. $38 price target. E*Trade ( ETFC) rated new Market Perform at BMO Capital. $14 price target. Company lacks a leverage to rising interest rates. Google ( GOOG - Get Report) rated new Overweight at JPMorgan. $660 price target. Strong secular growth. HollyFrontier ( HFC) rated new Outperform at Credit Suisse. $95 price target. Company is positioned well to deliver solid growth. LabCorp ( LH) rated new Neutral at JPMorgan. $105 price target. Current valuation already reflects improving healthcare trends. Marriott ( MAR) upgraded at Baird from Neutral to Outperform. Valuation call, based on a $44 price target. MGM Resorts ( MGM - Get Report) upgraded at Key Banc from Underweight to Hold. Company should perform in line with the market given gradually improving fundamentals. McGraw-Hill ( MHP) upgraded at Goldman from Neutral to Buy. $50 price target. Company trades at a discount to its peers. News Corp. ( NWSA - Get Report) downgraded at Argus from Buy to Hold. Company is facing increased headwinds to growth. MetroPCS ( PCS) rated new Buy at Kaufman. $24 price target. Weak economy benefits the prepaid wireless segment. Charles Schwab ( SCHW) rated new Outperform at BMO. $21 price target. Company deserves a premium valuation. Yahoo! ( YHOO) rated new Neutral at JPMorgan. $18 price target. End of report.