Analysts' Actions -- Tableau, Nucor, Pfizer, Square and More

RATINGS CHANGES

American Airlines (AAL) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: AAL.

Amsurg (AMSG) was upgraded to outperform from market perform at Wells Fargo. The valuation is more attractive, with the stock down 24% since June, Wells said. 

Cabot Oil & Gas (CBT) was downgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: CBT.

Cornerstone (CSOD) was downgraded to neutral from overweight at JPMorgan. $40 price target. The valuation is less attractive, as the stock has outperformed by 28% over the past two years, JPMorgan said. 

Tableau Software (DATA) was downgraded to market perform at William Blair. The company lacks visibility and offered disappointing guidance, William Blair said. 

Envision (EVHC) was upgraded to outperform from market perform at Wells Fargo. The valuation is more attractive, Wells said. 

Frontier (FTR) was downgraded to hold from buy at Deutsche Bank. $4 price target. The company can't cut costs fast enough to offset lower revenue, Deutsche said. 

Nucor (NUE) was upgraded to buy from hold at Berenberg. $57 price target. The company is leveraged to higher steel prices, Berenberg said. 

Paycom (PAYC) was downgraded to neutral from overweight at JPMorgan. $53 price target. The valuation is less attractive, as the stock has tripled in the past two years, JPMorgan said. 

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