Analyst upgrades:

• Baird upgraded Buffalo Wild Wings (NASDAQ: BWLD) to Outperform from Neutral following strong Q2 results as they expect comps momentum, operating leverage, and potentially favorable chicken wing costs to support healthy trends in 2H08.
  
• RBC Capital upgraded Myriad Genetics (NASDAQ: MYGN) to Outperform from Sector Perform citing solid core molecular diagnostics growth and increased confidence that the spin-out will generate better shareholder value.

Analyst downgrades:

• Citigroup downgraded shares of Wyeth (NYSE: WYE) to Sell from Hold following the disappointing bapineuzumab data and lowered their target to $39 from $49.
• Molson Coors (NYSE: TAP) was downgraded to Neutral from Overweight at JP Morgan.
  
• UBS lowered Affymetrix (NASDAQ: AFFX) and Sepracor (NASDAQ: SEPR) to Neutral from Buy.
  
• Sony (NYSE: SNE) was downgraded to Underweight from Neutral at HSBC.

Analyst initiations:

• Citigroup initiated Intercontinental Exchange (NYSE: ICE) with a Hold rating and $112 target. The firm believes regulatory concerns and a potential deceleration in energy trading volumes could limit upside in the stock near-term.
  
• Banc of America assumed Walgreen Co. (NYSE: WAG) with a Buy rating and $38 target and believes fewer new pharmacies openings removes an impediment to higher ROIC.