Analysts' Actions: LULU YUM AET AMD BRCM

NEW YORK ( TheStreet) -- CHANGE IN RATINGS

Aetna ( AET) upgraded at JPMorgan to Overweight from Neutral. $52 price target. Expectation of upwardly revised numbers post CVH deal closing.

Affymetrix ( AFFX) downgraded to sell at TheStreet Ratings.

Alexion Pharmaceuticals ( ALXN) rated new Neutral at Citi. $104 price target. Will need significant upside to offset P/E contraction.

Allot Communications ( ALLT) downgraded to hold at TheStreet Ratings.

American Greetings ( AM) downgraded to hold at TheStreet Ratings.

DST Systems ( DST) upgraded at Sterne Agee to Buy from Hold, Sterne Agee said. $71 price target. Clear path to monetize non-core assets.

Mid America Apartment Communities ( MAA) rated new Hold at KeyBanc. Shares are fairly valued given the company's balanced growth.

Marathon Petroleum ( MPC) rated new Neutral at JPmorgan. $62 price target. Attractive exposure to US Mid-Continent.

Melco Crown Entertainment ( MPEL) upgraded at JPMorgan to Overweight from Neutral, JPmorgan said. $20 price target. Shares are attractive at current levels.

STOCK COMMENTS / EPS CHANGES

Aecom Technology ( ACM) numbers raised at D.A. Davidson. Shares of ACM now seen reaching $27, D.A. Davidson said. Estimates also raised on expected

Advanced Micro Devices ( AMD) estimates cut at Oppenheimer through 2012, Oppenheimer said. Draws short straw while amending wafer supply agreement. Perform rating.

Broadcom Corporation ( BRCM) estimates raised at D.A. Davidson through 2013, D.A. Davidson said. Positive comments from the analyst day. Buy rating.

salesforce.com ( CRM) target raised at Citi. Shares of CRM now seen reaching $190, Citi said. A strong fourth quarter improves outlook. Buy rating.

Ingersoll-Rand ( IR) numbers raised at Credit Suisse. Shares of IR now seen reaching $51, Credit Suisse said. Estimates also raised on margin potential. Outperform rating.

lululemon athletica ( LULU) numbers raised at Credit Suisse. Shares of LULU now seen reaching $86, Credit Suisse said. Estimates also raised on strong 3Q demand. Outperform rating.

Noble Energy ( NBL) numbers raised at UBS. Shares of NBL now seen reaching $126, UBS said. Estimates also increased on higher Marcellus and Niobrara NAVs. Buy rating.

Yum! Brands ( YUM) estimates cut at Oppenheimer through 2013, Oppenheimer said. Recent SSS weakness in China. Outperform rating and $82 price target.

YUM! Brands target lowered at Bank of America. Shares of YUM now seen reaching $76, Bank of America said. Softness in China sales. Buy rating.

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