Lowe's (LOW) was downgraded at Canaccord Genuity to sell from hold. Twelve-month price target is $37. Valuation call, as the stock is up 88% over the past two years, Canaccord Genuity said.

Live Nation (LYV) downgraded at Sterne Agee to Neutral. Valuation call, based on a 12-month price target of $26.50, Sterne Agee said.

Twitter (TWTR) was upgraded at Nomura to buy. Twelve-month price target is $43. Estimates were also increased, given higher expected sales per user and margins, Nomura said.

Williams-Sonoma (WSM) was upgraded at Piper Jaffray to overweight from neutral. Twelve-month price target is $85. Company is using technology to drive improved customer service, Piper Jaffray said.

Editor's note: To see analysts' stock comments and changes to price targets and earnings estimates, go to "Street Notes" which is available only to Real Money subscribers. To find out how to become a subscriber, please click here.

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This article was written by a staff member of TheStreet.

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