RATINGS CHANGES

Alliance Data Systems (ADS) - Get Report was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: ADS.

Advanced Micro Devices (AMD) - Get Report was upgraded to buy from underperform at Bank of America/Merrill Lynch. $12 price target. Earnings estimates were also increased as the company has sizable growth options, analysts said. 

Continental Resources (CLR) - Get Report was downgraded to neutral from overweight at J.P. Morgan. The valuation is less attractive, based on a $57 price target. 

Delek U.S. (DK) - Get Report was upgraded to outperform from neutral at Credit Suisse. $28 price target. ALJ merger synergies are not being appreciated by the market, Credit Suisse said. 

Fitbit (FIT) - Get Report was downgraded to hold at Deutsche Bank. $9 price target. Wearables growth is slowing, Deutsche said. 

Hess (HES) - Get Report was upgraded to overweight from neutral at J.P. Morgan. $65 price target. Increased Bakken activity can drive growth in the coming quarters, J.P. Morgan said. 

Helmerich & Payne (HP) - Get Report was downgraded to neutral from buy at Bank of America/Merrill Lynch. The valuation is less attractive, based on an $82 price target. 

Juniper Networks (JNPR) - Get Report was upgraded to buy from neutral at Nomura. $33 price target. QFX will drive growth in the coming quarters, Nomura said. 

L-3 Communications (LLL) - Get Report was downgraded to neutral from buy at Bank of America/Merrill Lynch. $170 price target. Growth outlook is lower than its peers, analysts said. 

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

Scotts Miracle-Gro(SMG) - Get Report was upgraded to buy from underperform at Bank of America/Merrill Lynch. $105 price target. Earnings estimates also increased, given the company's growth in hydroponics, analysts said. 

This article was written by a staff member of TheStreet.