Top Analyst Upgrades & Downgrades (BX, COP, DISCA, GGP, HOLX, AGN, NVDA, STRA, TKC, UNH, URI, WM, WLP)

These are some of the top analyst upgrades, downgrades, and initiations seen from Wall Street research calls this Thursday morning.

The Blackstone Group LP (NYSE: BX) Started as Buy at Citigroup.
ConocoPhillips (NYSE: COP) Maintained Buy on Focus List with $81 target at Argus.
Discovery Communications, Inc. (NASDAQ: DISCA) Started as Neutral at Credit Suisse.
General Growth Properties Inc. (NYSE: GGP) Raised to Outperform at Credit Suisse.
Hologic Inc. (NASDAQ: HOLX) replaced Allergan Inc. (NYSE: AGN) on the Convition Buy List at Goldman Sachs.
NVIDIA Corporation (NASDAQ: NVDA) Raised to Outperform as Bull of the Day at Zacks Investment Research.
Strayer Education (NASDAQ: STRA) was named the Bear of the Day at Zacks Investment Research.
Turkcell (NYSE: TKC) Cut to Underperform at Credit Suisse.
UnitedHealth Group Inc. (NYSE: UNH) Raised to Buy at Stifel Nicolaus.
United Rentals, Inc. (NYSE: URI) Started as Buy at Goldman Sachs.
Waste Management Inc. (NYSE: WM) Maintained BUY with $44 target at Argus.
WellPoint Inc. (NYSE: WLP) Raised to Buy at Stifel Nicolaus.

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JON C. OGG