RATINGS CHANGES

American Axle (AXL) - Get Report was downgraded to neutral from buy at Citigroup. The valuation is less attractive, based on a $24 price target. 

Carter's (CRI) - Get Report was upgraded to overweight from neutral at Piper Jaffray. $100 price target. The valuation is more attractive, as the stock is down 25% since August, Piper said. 

Exelon (EXC) - Get Report was upgraded to overweight from sector weight at Keybanc. $41 price target. Nuclear subsidies should help place a floor under the merchant exposure, Keybanc said. 

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

PulteGroup (PHM) - Get Report was upgraded to outperform from market perform at FBR Capital Markets. $26 price target. The company can continue to post solid growth in 2017, FBR said. 

Under Armour (UAA) - Get Report (UA) - Get Report was upgraded to equal-weight at Morgan Stanley. The valuation is more attractive, based on a $20 price target. 

Zillow (Z) - Get Report was upgraded to buy from hold at Stifel. $43 price target. The company appears to be raising prices, which should boost margins, Stifel said. 

This article was written by a staff member of TheStreet.