Editor's Note: Green and red arrows refer to intraday stock price movement.NEW YORK ( TheStreet) -- CHANGE IN RATINGS Alcoa ( AA) upgraded at BMO from Underperform to Market Perform. $14 price target. Little further share price downside, but company may struggle with profit margins. Adobe Systems ( ADBE) downgraded at RBC from Sector Perform to Underperform. $22 price target. New business model could add to near-term sales volatility. Apollo Group ( APOL) rated new Hold at Wunderlich Securities. $49 price target. Current restructuring should benefit the company. Airgas ( ARG) upgraded at Goldman from Neutral to Buy. $70 price target. Company has defensive, late-cycle exposure. Buffalo Wild Wings ( BWLD) upgraded at Sterne Agee from Neutral to Buy. $72 price target. Recent pullback and double digit growth provide an attractive opportunity. CF Industries ( CF) downgraded at JPMorgan from Overweight to Neutral. $170 price target. Weak August USDA data should impact stock. Choice Hotels ( CHH) upgraded at Jefferies from Underperform to Buy. $33 price target. Company has a relatively stable business model. Chesapeake Energy ( CHK) rated new Buy at Brean. $40 price target. Company is growing and working on deleveraging its balance sheet. Check Point ( CHKP) upgraded at Stifel from Hold to Buy. $65 price target. Relative risk/reward is attractive at current levels. Concur Technologies ( CNQR) downgraded at RBC from Outperform to Underperform. $30 price target. Company's sales tend to tail off in the second half of the year. Capital One ( COF) upgraded at RBC from Sector Perform to Outperform. $56 price target. Recent deals should add to earnings. Discover Financial ( DFS) upgraded at RBC from Outperform to Top Pick. $30 price target. Pullback has created an attractive buying opportunity. Discovery Communications ( DISCA) upgraded at Citigroup from Hold to Buy. $46 price target. Ad revenues resilient to double dip and EPS upside with buybacks. Dow Chemical ( DOW) downgraded at Goldman from Buy to Neutral. $32 price target. Company is likely to see lower demand in the coming quarters. DeVry ( DV) estimates, target cut at Morgan Stanley. DV estimates were reduced through 2013. Company is seeing lower new student growth and costs are rising. Overweight rating and new $60 price target. Devry downgraded at Baird from Outperform to Neutral. $53 price target. Slower economic growth could weigh on sales and margins.