RATINGS CHANGES

Apple (AAPL - Get Report) was downgraded to hold from buy at Stifel. $115 price target. The company lacks near-term catalysts, Stifel said. 

AK Steel (AKS - Get Report) was upgraded to buy from underperform at Bank of America/Merrill Lynch. $8 price target. Earnings estimates have also increased, given cost-cutting and a focus on premium products, analysts said. 

AthenaHealth (ATHN was downgraded to equal-weight from overweight at Morgan Stanley. $117 price target. Business transition is impacting revenue growth, Morgan said. 

Allegheny (ATI - Get Report) was downgraded to hold at Deutsche Bank. $17 price target. The company is seeing weaker growth across the board, outside of aerospace, Deutsche said.

CR Bard (BCR was upgraded to outperform from market perform at BMO Capital. The valuation is more attractive, based on a $240 price target, BMO said. 

Baker Hughes (BHI was upgraded to outperform from market perform at Cowen. $65 price target. The company is trading at a discount to its peers and can continue to cut costs, Cowen said. 

Chipotle (CMG - Get Report) was downgraded to neutral from outperform at Credit Suisse. $375 price target. Sales recovery is taking longer than expected, Credit Suisse said. 

General Motors (GM - Get Report) was downgraded to neutral from buy at Bank of America/Merrill Lynch. $37 price target. Sentiment is muted, as the domestic auto cycle is peaking, analysts said. 

Greenbrier (GBX - Get Report) was downgraded to neutral from buy at Bank of America/Merrill Lynch. $36 price target. The company is seeing soft demand and declining margins, analysts said. 

Lowe's (LOW - Get Report) was downgraded to neutral from overweight at JPMorgan. $72 price target. Earnings estimates were also cut, given a more difficult consumer environment, JPMorgan said. 

Lowe's was downgraded to neutral from outperform at Wedbush. $73 price target. The housing cycle has likely already seen its best days, Wedbush said. 

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

Masco (MAS - Get Report) was upgraded to buy from neutral at MKM Partners. $36 price target. The stock's 10% decline has created a buying opportunity, MKM said. 

Nordic American Tankers (NAT - Get Report) was downgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: NAT.

Pandora (P was downgraded to underweight from overweight at Albert Fried. $8 price target. The company is facing increased operating costs and competition. 

Team Health (TMH was downgraded to market perform at Leerink Partners. $43 price target. The company is facing operating challenges and is already factoring in a potential takeover, Leerink said. 

Under Armour (UA - Get Report) was downgraded to hold at Deutsche Bank. $32 price target. Profit is being hurt by future investments and the company is valued at 48x expected 2017 earnings, Deutsche said. 

Williams-Sonoma (WSM - Get Report) was downgraded to perform at Wedbush. Merchandising shortcomings at Pottery Barn will likely weigh on sales growth, Wedbush said. 

This article was written by a staff member of TheStreet.