Today's Upgrades and Downgrades..

These are some of Thursday’s top analyst upgrades, downgrades, and initiations seen from Wall Street research calls.

Advance Auto Parts. Inc. (NYSE: AAP) cut to Neutral at Credit Suisse.

Amazon.com Inc. (NASDAQ: AMZN) added to Strong Sell List at Zacks.

Anheuser-Busch InBev (NYSE: BUD) Cut to Neutral at UBS.

Carbonite, Inc. (NASDAQ: CARB) Reiterated Buy with $16 target at Canaccord Genuity.

Cisco Systems Inc. (NASDAQ: CSCO) Raised to Buy at Deutsche Bank; Raised to Buy at Citigroup; Target raised to $26 from $25 at Credit Suisse.

Computer Sciences Corporation (NYSE: CSC) Cut to Underweight at JPMorgan.

Dean Foods Company (NYSE: DF) Cut to Sell at S&P Capital IQ (late-Wednesday); Maintained Buy at Bof A/ML.

Enterprise Products Partners (NYSE: EPD) named Bull of the Day at Zacks.

Hospira, Inc. (NYSE: HSP) named Bear of the Day at Zacks.

Kraft Foods Inc. (NYSE: KFT) Reiterated Buy with $40 target at Argus.

Logitech International SA (NASDAQ: LOGI) Raised to Hold at S&P Capital IQ (late-Wednesday).

Nokia Corporation (NYSE: NOK) maintained Hold with $7.50 target at Canaccord Genuity.

PG&E Corporation (NYSE: PCG) cut to Neutral at Credit Suisse.

SandRidge Energy, Inc. (NYSE: SD) Cut to Neutral at Goldman Sachs.

Spreadtrum Communications Inc. (NASDAQ: SPRD) Reiterated Buy and raised estimates at Canaccord Genuity.

SurModics Inc. (NASDAQ: SRDX) named as Aggressive Growth at Zacks.

Vertex Pharmaceuticals Incorporated (NASDAQ: VRTX) Raised to Equal-Weight at Morgan Stanley.