Upgrades and downgrades before the market open

Upgrades:

Microsoft (MSFT) upgraded from Neutral to Buy at Nomura

Amazon (AMZN) upgrade from Mkt Perform to Outperform at Raymond James

AT&T (T) upgraded from Neutral to Outperform at Macquarie, target raised from $33 to $37

Amazon (AMZN) upgraded from Neutral to Overweight at JP Morgan, target raised from $375 to $535

Downgrades:

General Motors (GM) downgraded from Buy to Neutral at Buckingham Research

Other:

Starbucks (SBUX) target raised from $47.50 to $57 at Oppenheimer, from $50 to $55 at RBC Capital Mkts, from $51 to $59 at Telsey Advisory Group

Microsoft (MSFT) reiterated at Outperform at RBC Capital Mkts, target raised from $47 to $50

Google (GOOG) reiterated at Perform at Oppenheimer, target lowered from $565 to $550

Google (GOOG) reiterated at outperform at RBC Capital Mkts, target raised from $630 to $640

Amazon (AMZN) reiterated at Buy at Cantor Fitzgerald, target raised from $385 to $460

Google (GOOG) reiterated at Outperform at FBR Capital, target raised from $632 to $672

Google (GOOG) reiterated at Overweight at JP Morgan, target raised from $600 to $650

Amazon (AMZN) reiterated at Outperform at RBC Capital Mkts, target raised from $400 to $500