RATINGS CHANGE

Casey's  (CASY - Get Report) was upgraded to buy, Jefferies said. $134 price target. This is a valuation call following a recent pullback, said Jefferies.

CNO Financial  (CNO - Get Report) was downgraded to neutral from buy, Goldman Sachs said. $17 price target. Estimates were also cut because the company is halting its buyback program due to lower reinsurance recapture rates, said Goldman.

Qualcomm  (QCOM - Get Report) was upgraded to buy from neutral, Mizuho said. $75 price target. A possible deal with NXP (NXPI - Get Report)  appears to make both strategic and financial sense.

Sprouts  (SFM - Get Report) was upgraded to buy, Jefferies said. $24 price target. Its low-price strategy should allow the company to gain market share over the long term, according to Jefferies.

Walmart  (WMT - Get Report) was initiated with an overweight rating, Keybanc said. $90 price target. Investments should eventually lead to sustainable market share gains, according to Keybanc.

AutoZone (AZO)  was downgraded to sell at TheStreet Ratings. You can view the full analysis from the report here: AZO

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

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

This article was written by a staff member of TheStreet.