Editor's Note: Green and red arrows refer to intraday stock price movement.

NEW YORK ( TheStreet) -- CHANGE IN RATINGS

Alcoa ( AA - Get Report) 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 - Get Report) 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 - Get Report) 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.

Edison International ( EIX) upgraded at Credit Suisse from Neutral to Outperform. $41 price target. Compelling entry point given recent share weakness.

Eastman Chemical ( EMN) downgraded at Goldman from Neutral to Sell. $89 price target. Industry demand should slow down in the second half of the year.

Eaton Vance ( EV) estimates, target lowered at Jefferies. Shares of EV now seen reaching $26. Estimates also lowered as fund flow trends across the platform continue to deteriorate. Hold rating.

Starwood Hotels ( HOT) downgraded at Jefferies from Buy to Hold. $42 price target. Company could be hurt by slower macro growth.

Hewlett-Packard ( HPQ) upgraded at Jefferies from Hold to Buy. $40 price target. Company is well positioned for transition to the cloud.

Nordstrom ( JWN - Get Report) upgraded at Stifel from Hold to Buy. $52 price target. Company continues to execute well.

MercadoLibre ( MELI) upgraded at BofA Merrill from Underperform to Neutral. $80 price target. Pago onsite penetration has room to grow.

Oracle ( ORCL) downgraded at RBC from Outperform to Sector Perform. $30 price target. Operating margins are likely peaking.

Polaris Industries ( PII) upgraded at Wells Fargo from Market Perform to Outperform. $120 to $125 valuation range. Growth opportunities intact, market share gains continue.

Pall ( PLL) upgraded at Wedbush from Neutral to Outperform. $60 price target. Estimates also boosted, following recent positive channel checks.

Panera ( PNRA) upgraded at Miller Tabak from Hold to Buy. $125 price target. Defensive restaurant play in a tough macro environment.

Southwestern Energy ( SWN) upgraded at Baird from Neutral to Outperform, Robert Baird said. $45 price target. Stock has lagged its peers, but has an attractive, low-cost business model.

Valspar ( VAL) upgraded at JPMorgan from Neutral to Overweight. $33 price target. Solid company with attractive current price.

Wisconsin Energy ( WEC) upgraded at Baird to Outperform. Utility sector should see more interest in a volatile market environment.

Aqua America ( WTR) upgraded at Baird to Outperform. Company is a solid, defensive play in a volatile environment.

Weyerhaeuser ( WY) upgraded at RBC from Underperform to Sector Perform. Worst appears to already be behind the stock. RBC Capital Mkts upgrades WY to Sector Perform from Underperform saying they believe that worst is behind for Weyerhaeuser's stock and that the company's significant asset value and yield will attract investor interest at the current pricing level.

Xcel Energy ( XEL) upgraded at Baird to Outperform. Company should outperform in an uncertain macro environment.

More to come.

This article was written by a staff member of TheStreet.