Top Analyst Upgrades & Downgrades (APKT, AFFX, AKS, AAPL, CCI, EMC, GD, GMCR, LMT, MOS, NTAP, OFG, POT, STLD, TIVO)

Source: Jon Ogg
These are some of the top analyst upgrades, downgrades, and initiations seen from Wall Street brokerage and research firms this Wednesday morning. 

Acme Packet, Inc. (NASDAQ: APKT) Cut to Neutral at Wedbush; estimates and targets lowered after revenue warnings from Morgan Keegan and Wells Fargo.
Affymetrix Inc. (NASDAQ: AFFX) Raised to Neutral from Underweight at JPMorgan.
AK Steel Holding Corporation (NYSE: AKS) Raised to Neutral at Bank of America Merrill Lynch.
Apple Inc. (NASDAQ: AAPL) Reiterated Outperform with $500 target and raised estimates at Credit Suisse.
Crown Castle International Corp. (NYSE: CCI) Started as Buy at Stifel Nicolaus.
EMC Corporation (NYSE: EMC) added to the U.S. Focus List at Credit Suisse.
General Dynamics Corporation (NYSE: GD) Raised to Overweight at JPMorgan.
Green Mountain Coffee Roasters Inc. (NASDAQ: GMCR) Reiterated Buy with $94 target at Canaccord Genuity.
Lockheed Martin Corporation (NYSE: LMT) Cut to Underperform by RBC Capital Markets.
Mosaic Co. (NYSE: MOS) Cut to Neutral at Citigroup.
NetApp Inc. (NASDAQ: NTAP) Cut to Neutral from Outperform at Credit Suisse.
Potash Corp. of Saskatchewan, Inc. (NYSE: POT) Started as Underperform at National Bank.
Steel Dynamics Inc. (NASDAQ: STLD) Raised to Buy at Bank of America Merrill Lynch.
TiVo Inc. (NASDAQ: TIVO) Raised to Overweight at Evercore Partners.


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