RATINGS CHANGES

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

BOK Financial (BOKF - Get Report) was downgraded to underperform at Wells Fargo. Earnings estimates were also cut, given higher credit costs, Wells said. 

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

FirstEnergy (FE - Get Report) was downgraded to sector perform at RBC Capital. $33 price target. The company is facing stiff regulatory pressure and will likely have to sell $2 billion of new equity, RBC said. 

FirstEnergy was also downgraded by Jefferies, to hold from buy. $35 price target. The company is facing regulatory issues and may need to issue more equity, Jefferies said. 

Hess (HES - Get Report) was downgraded to neutral from outperform at Credit Suisse. The valuation is less attractive, based on a $65 price target, Credit Suisse said. 

Infinera (INFN - Get Report) was downgraded to neutral from buy at MKM Partners. $15 price target. The company's acquisition of Transmode is not performing as well as expected, MKM said. 

Mantech (MANT - Get Report) was downgraded to neutral from underperform at Credit Suisse. $26 price target. Organic growth has resumed at the company, Credit Suisse said. 

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

Service Corp. (SCI) was upgraded to outperform from neutral at Credit Suisse. $32 price target. The company is seeing higher revenue and faces fewer operational challenges ahead, Credit Suisse said. 

Wex (WEX - Get Report) was downgraded to market perform at Wells Fargo. The valuation is less attractive, despite the company's leverage to higher expected fuel prices, Wells said. 

Whiting Petroleum (WLL - Get Report) was downgraded to sector perform from outperform at RBC Capital. $12 price target. The valuation is less attractive, as the company continues to have high capital spending, RBC said.

This article was written by a staff member of TheStreet.