RATINGS CHANGES

American Electric Power (AEP - Get Report) was upgraded to buy from neutral at Goldman Sachs. The company can deliver above-average growth and is attractively valued, Goldman said. 

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

Calpine (CPN) was upgraded to buy from hold at Deutsche Bank. $20 price target. The valuation is more attractive, as the stock has lagged its peers by 20% year-to-date, Deutsche said. 

FirstEnergy (FE - Get Report) was downgraded to sell from neutral at Goldman Sachs. The company has high leverage and will likely struggle to meet consensus expectations, Goldman said. 

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

Nordstrom (JWN - Get Report) was upgraded to outperform from neutral at Piper Jaffray. $53 price target. The company's anniversary sale is progressing well, Piper said. 

Rockwell Collins (ROK - Get Report) was downgraded to hold from buy at Canaccord Genuity. $94 price target. The company is seeing softer commercial demand, Canaccord said. 

Sprint (S - Get Report) was upgraded to sector weight at Pacific Crest. Churn, margin and pre-paid subscriptions are trending ahead of expectations, Pac Crest said. 

Texas Instruments (TXI) was upgraded to buy from neutral at Bank of America/Merrill Lynch. $80 price target. The company has addressed concerns and can deliver 10% annual earnings growth, analysts said. 

Texas Roadhouse (TXRH - Get Report) was downgraded to underperform at Jefferies. $37 price target. The valuation appears stretched, as same-store sales are normalizing, Jefferies said.

This article was written by a staff member of TheStreet.