RATINGS CHANGES

Agios Pharmaceuticals (AGIO - Get Report) was upgraded to overweight from neutral at JPMorgan. $62 price target. Expect better PKD and hematology clinical data, JPMorgan said.

Agios Pharmaceuticals was upgraded to buy from hold at Canaccord Genuity. $90 price target. PKD treatment is showing meaningful clinical progress, Canaccord said.

Axiall (AXLL) was downgraded to neutral from overweight at JPMorgan. The valuation is less attractive, based on a $33 price target, JPMorgan said.

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

Concho Resources (CXO - Get Report) was upgraded to overweight at Morgan Stanley. $173 price target. The company has long-term oil exposure with significant upside growth potential, Morgan Stanley said.

Endologix (ELGX - Get Report) was upgraded to buy at Canaccord Genuity. $15.50 price target. Nellix momentum can drive upside in the next couple of years, Canaccord said.

ON Semiconductor (ON - Get Report) was upgraded to overweight at Pacific Crest. $13 price target. The company should see higher incremental ADAS content and synergies from the Fairchild purchase, Pac Crest said.

Occidental Petroleum (OXY - Get Report) was downgraded to equal-weight from overweight at Morgan Stanley. The valuation is less attractive, based on $70 price target, Morgan Stanley said.

PRA Health (PRAH - Get Report) was upgraded to overweight at Keybanc. $55 price target. Management is reducing structural overhangs and will likely boost guidance, Keybanc said.

US Silica (SLCA - Get Report)  was downgraded to neutral from buy at DA Davidson. The valuation is less attractive, based on a $36 price target, DA Davidson said.

Sprouts Farmers Market (SFM - Get Report) was downgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: SFM.

Williams Partners (WPZ) was upgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: WPZ.

This article was written by a staff member of TheStreet.