Top Analyst Upgrades & Downgrades (ACE, AIG, CAR, RATE, CIEN, CTSH, DNDN, EBAY, ENS, EXPD, GOOG, JPM, MM, MS, NBG, PTR, RTN, VCLK, VECO, YGE)

Ace Ltd. (NYSE: ACE) Started as Buy at Stern Agee.

American International Group (NYSE: AIG) Started as Buy at Stern Agee.

Avis Budget Group, Inc. (NYSE: CAR) named as Bull of the Day at Zacks.

Bankrate, Inc. (NYSE: RATE) Started as Buy at Canaccord Genuity.

CIENA Corp. (NASDAQ: CIEN) Reiterated Outperform with $25 target at Credit Suisse.

Cognizant Technology Solutions Corporation (NASDAQ: CTSH) Cut to Sell at Goldman Sachs.

Dendreon Corporation (NASDAQ: DNDN) Reiterated Neutral but with $12 target at Credit Suisse.

eBay Inc. (NASDAQ: EBAY) Started as Buy at Needham.

EnerSys (NYSE: ENS) named as value stock of the day at Zacks.

Expeditors International (NASDAQ: EXPD) named as Bear of the Day at Zacks.

Google Inc. (NASDAQ: GOOG) Started as Equal-Weight at Morgan Stanley.

J.P. Morgan Chase & Co. (NYSE: JPM) Raised to Conviction Buy List at Goldman Sachs.

Millennial Media Inc. (NYSE: MM) Started as Buy at Canaccord Genuity.

Morgan Stanley (NYSE: MS) Cut to Neutral from Conviction Buy List at Goldman Sachs.

National Bank of Greece (NYSE: NBG) Cut to Reduce at Nomura.

PetroChina Co. Ltd. (NYSE: PTR) Cut to Neutral at Citigroup.

Raytheon Co. (NYSE: RTN) Started as Buy at Stifel Nicolaus.

ValueClick (NASDAQ: VCLK) Cut to Neutral at Piper Jaffray.

Veeco Instruments (NASDAQ: VECO) Raised to Buy at Stifel Nicolaus.

Yingli Green Energy Holding Co. Ltd. (NYSE: YGE) Cut to Sell at Goldman Sachs.

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JON C. OGG