NEW YORK (TheStreet) -- RATINGS CHANGES

ComScore ( SCOR - Get Report) was downgraded to neutral from buy by Goldman Sachs, which cited valuation, based on a 12-month price target of $57.

Crown Holdings (CCK - Get Report) was downgraded to buy from neutral by Goldman, citing valuation based on a 12-month price target of $59.

EMC (EMC) was downgraded to market perform from outperform by FBR Capital Markets, which set a 12-month price target of $28, saying that EMC's fundamentals are weakening.

Idera Phamaceuticals (IDRA - Get Report) was started at overweight by J.P. Morgan, which set a 12-month price target of $6. The company's lead asset, IMO-8400, is being studied in two phase 1/2 proof-of-concept studies in MYD88 positive Waldenstrom's macroglobulinemia (WM) and diffuse large B-cell lymphoma (DLBCL), J.P. Morgan said.

Jabil Circuit (JBL - Get Report) was upgraded to buy from hold by Needham, which said Jabil is performing well with Apple (AAPL - Get Report) and other mobile customers.

Ligand Pharmaceuticals (LGND - Get Report) was downgraded to hold from buy by Deutsche Bank, which cited valuation based on a 12-month price target of $94.

Lowe's (LOW - Get Report) was upgraded to outperform from neutral by Wedbush, which set a 12-month price target of $82, saying that Lowe's is taking market share from Sears (SHLD) and is leveraged to lower interest rates.

Mattress Firm (MFRM) was downgraded to neutral from outperform by Wedbush, which set a 12-month price target of $60, saying the company is facing multiple growth headwinds.

Micron (MU - Get Report) was downgraded to underweight by Morgan Stanley, which set a 12-month price target of $21, saying that Micron's seasonal surge will likely not be as strong as usual.

Ormat Technologies (ORA - Get Report) was started at overweight by J.P. Morgan, which set a 12-month price target of $43, saying that Ormat is a global leader in geothermal energy solutions, positioned to outpace the growth of that industry and expand into adjacent renewable solutions.

Restoration Hardware (RH - Get Report) was downgraded to hold by TheStreet Ratings team. You can view the full analysis from the report here: RH Ratings Report.

SanDisk (SNDK) was downgraded to equal-weight from overweight by Morgan Stanley, which set a 12-month price target of $75, saying the company is losing market share and will likely see lower margins.

Select Comfort (SCSS) was downgraded to neutral from outperform by Wedbush, which set a 12-month price target of $34, saying that business will likely slow down in the coming quarters.

Teradata (TDC - Get Report) was downgraded to underperform by market perform by JMP Securities, which set a 12-month price target of $30, saying the company is facing increased competition.

Weibo (WB - Get Report) was upgraded to hold by TheStreet Ratings teams. You can view the full analysis from the report here: WB Ratings Report.

Williams-Sonoma (WSM - Get Report) was upgraded to outperform from neutral by Wedbush, which set a 12-month price target of $92, saying the company should see better operating leverage.