RATINGS CHANGES

Astoria Financial (AF) was upgraded to overweight at Piper Jaffray. $19.50 price target. The valuation is more attractive, following the recent merger termination, Piper said. 

Cardinal Health (CAH) was downgraded to market perform at Leerink Partners. $75 price target. Earnings estimates were also reduced, as the company is facing multiple growth headwinds, Leerink said. 

Chevron (CVX) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: CVX.

Alphabet (GOOGL) was initiated with a buy rating at Aegis Capital. $980 price target. The company has multiple growth tailwinds and is buying back stock, Aegis said. 

Monster Beverage (MNST) was upgraded to buy at Jefferies. $58 price target. The company is attractively valued and sales growth is accelerating, Jefferies said. 

Square (SQ) was initiated with a sell rating at TheStreet Ratings. You can view the full analysis from the report here: SQ.

Westinghouse Air Brake Technologies (WAB) was upgraded to outperform from market perform at William Blair. $95 price target. The company should benefit from tax reform and deserves a higher multiple, William Blair said. 

This article was written by a staff member of TheStreet.