Ultimate Software ( ULTI) rated new Buy at ThinkEquity. $116 price target, Company can continue to gain market share.

Western Digital ( WDC) downgraded at Citigroup to Sell from Buy, Citigroup said. $32 price target. Further demand deterioration of PCs.

Wal-Mart ( WMT) upgraded at Jefferies to Buy from Hold, Jefferies said. $88 price target. Comp momentum continues.

Xylem ( XYL) rated new Buy at Brean Murray. $31 price target. End-market demand is likely at trough levels and the company trades at a discount to its peers.

Zimmer ( ZMH) rated new Outperform at JMP. $76 price target. Industry has several favorable tailwinds.

STOCK COMMENTS / EPS CHANGES

Advanced Micro ( AMD) numbers cut at BMO. Shares of AMD now seen reaching $3, according to BMO Capital. Estimates also reduced, given the company's new guidance. Market Perform rating.

Advanced Micro Devices numbers cut at UBS. Shares of AMD now seen reaching $3.25, UBS said. Estimates also lowered on 3Q preliminary results. Neutral rating.

JB Hunt ( JBHT) numbers raised at UBS. Shares of JBHT now seen reaching $65, UBS said. Estimates also increased on strong intermodal quarter.

Lowe's ( LOW) numbers raised at UBS. Shares of LOW now seen reaching $36, UBS said. Estimates also increased as company is poised for earnings acceleration. Buy rating.

McGraw-Hill ( MHP) numbers raised at Lazard. Shares of MHP now seen reaching $63, according to Lazard. Estimates also increased, given higher debt issuance rates. Buy rating.

Microsoft ( MSFT) estimates reduced at Pacific Crest through 2014, Pacific Crest said. Company is leveraged to lower PC demand. Sector Perform rating.

Children's Place ( PLCE) numbers increased at Sterne Agee. PLCE estimates were raised through 2014, Sterne Agee said. Sam's Club distribution should boost growth. Neutral rating and new $64 price target.

Western Refining ( WNR) numbers boosted at Credit Suisse. Shares of WNR now seen reaching $35.50, according to Credit Suisse. Estimates also upped, as the company is realizing higher refinery margins.

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