These are some of the top analyst upgrades, downgrades and initiations seen in Wall St. research calls this Friday.

The Active Network Inc. (NYSE: ACTV) cut to Market Perform at Raymond James and cut to Neutral at Citigroup.

Blackstone Group L.P. (NYSE: BX) reiterated Buy and raised target to $18 at Argus.

Brinker International Inc. (NYSE: EAT) reiterated Buy with $40 target at Argus.

Charter Communications Inc. (NASDAQ: CHTR) started as Hold at Deutsche Bank.

CNO Financial Group (NYSE: CNO) named Bull of the Day at Zacks.

Dean Foods Co. (NYSE: DF) started as Neutral at Credit Suisse.

Eldorado Gold Corp. (NYSE: EGO) started as Overweight at Morgan Stanley.

Emulex Corp. (NYSE: ELX) reiterated Buy with $11 target at Argus.

Enterprise Products Partners L.P. (NYSE: EPD) reiterated Outperform and raised target to $61 at Credit Suisse.

Exelon Corp. (NYSE: EXC) cut to Hold at Jefferies.

First Solar Inc. (NASDAQ: FSLR) cut to Hold at Cantor Fitzgerald.

General Motors Co. (NYSE: GM) maintained Outperform but cut target to $35 at Credit Suisse.

Guess? Inc. (NYSE: GES) cut to Hold at Jefferies.

MannKind Corp. (NASDAQ: MNKD) raised to Neutral at JPMorgan.

Nabors Industries Ltd. (NYSE: NBR) named Bear of the Day at Zacks.

UBS A.G. (NYSE: UBS) raised to Buy at Soc-Gen.

Vertex Pharmaceuticals Inc. (NASDAQ: VRTX) cut to Sell at Goldman Sachs.

JON C. OGG

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