RATINGS CHANGES

Advisory Board (ABCO) was downgraded to sector weight at Keybanc. It will likely take longer than expected for the company to resume its growth, Keybanc said. 

Church & Dwight(CHD) - Get Report was downgraded to underperform from neutral at Bank of America/Merrill Lynch. The valuation isn't as attractive based on a $97 price target, analysts said. 

Coty (COTY) - Get Report was downgraded to neutral from buy at Bank of America/Merrill Lynch. $31 price target. The valuation isn't as attractive, with shares trading at 30 times earnings. 

Ensco (ESV) was upgraded to hold from sell at Deutsche Bank. $9 price target. The company's recent equity offering is a good sign, Deutsche said. 

Exelon(EXC) - Get Report was downgraded to hold from buy at Deutsche Bank. $36 price target. The valuation is less attractive, with shares up 26% year-to-date, Deutsche said. 

Noble (NE) - Get Report was upgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: NE.

National Fuel Gas (NFG) - Get Report was downgraded to hold from buy at Jefferies. The valuation isn't as attractive, based on a $56 price target, Jefferies said. 

NetApp (NTAP) - Get Report was downgraded to underperform at Sterne Agee. $22 price target. A recent survey suggests lower end-market demand, Sterne said. 

Tupperware (TUP) - Get Report was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: TUP.

This article was written by a staff member of TheStreet.