Top Analyst Upgrades & Downgrades (AET, MO, CVH, CBST, DFS, EXM, HFC, MWW, RAI, XLNX, ZNGA)

Source: Jon Ogg
These are some of the top analyst upgrades, downgrades, and initiations seen from Wall Street research calls this Friday.

Aetna Inc. (NYSE: AET) Cut to Neutral at Goldman Sachs.

Altria Group, Inc. (NYSE: MO) Raised to Outperform at Wells Fargo.

Coventry Health Care, Inc. (NYSE: CVH) Raised to Buy at Goldman Sachs.

Cubist Pharmaceuticals, Inc. (NASDAQ: CBST) Started as Buy at ThinkEquity.

Discover Financial Services (NYSE: DFS) Raised to Conviction Buy List at Goldman Sachs; named Bull of the Day at Zacks.

Excel Maritime Carriers (NYSE: EXM) Cut to Underperform as Bear of the Day at Zacks.

HollyFrontier Corporation (NYSE: HFC) named as value stock of the day at Zacks.

Monster Worldwide, Inc. (NYSE: MWW) Raised to Outperform at Baird.

Reynolds American Inc. (NYSE: RAI) Cut to Market Perform at Wells Fargo.

Xilinx Inc. (NASDAQ: XLNX) Cut to Hold at Auriga.

Zynga Inc. (NASDAQ: ZNGA) Started as Underperform at Needham.

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