Updated from 8:21 a.m. to add video.

RATINGS CHANGES

Alexion Pharmaceuticals (ALXN - Get Report) was upgraded to outperform at BMO Capital. $168 price target. The post-earnings selloff has created a buying opportunity, BMO said. 

Boston Scientific (BSX - Get Report) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: BSX.

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

Columbia Banking (COLB - Get Report) was downgraded to neutral from overweight at Piper Jaffray. $31 price target. The company is facing margin pressure and weaker credit quality, Piper said. 

Cash America (CSH) was downgraded to market perform from outperform at JMP Securities. The valuation is less attractive, with shares up 37% year to date, JMP said. 

Ford (F - Get Report) was downgraded to neutral from buy at Bank of America/Merrill Lynch. $17 price target. Growth may decelerate in the second half of the year, analysts said. 

GNC (GNC - Get Report) was downgraded to neutral from buy at Goldman Sachs. $30 price target. Business appears to be stagnating at best, Goldman said.  

HMS Holdings (HMSY - Get Report) was upgraded to outperform at Oppenheimer. $21 price target. PCG settlement eliminates risk form the thesis, Oppenheimer said. 

World Fuel (INT - Get Report) was downgraded to neutral from outperform at Credit Suisse. $45 price target. Earnings estimates were also cut, as the transition process is taking longer, Credit Suisse said. 

Molina (MOH - Get Report) was downgraded to underperform from buy at Bank of America/Merrill Lynch. The company will likely fall short of future guidance given higher medical costs, analysts said. 

Insulet (PODD - Get Report) was upgraded to outperform at William Blair. Insulin business is driving growth and higher margins, William Blair said. 

Stericycle (SRCL - Get Report) was downgraded to underperform at RBC Capital. $96 price target. The company posted the latest in a string of weak results, RBC said. 

Synaptics (SYNA - Get Report) was downgraded to market perform at BMO Capital. $69 price target. Earnings estimates were also cut, as the company lowered guidance again, BMO said. 

United Technologies (UTX - Get Report) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: UTX.

Western Digital (WDC - Get Report) was downgraded to neutral from outperform at Robert Baird. $50 price target. The company cut guidance, given challenges in the PC market, Robert Baird said. 

WEX (WEX - Get Report) was upgraded to neutral from underweight at JPMorgan. $91 price target. The company is leveraged to higher fuel prices and is seeing better volume growth and credit trends, JPMorgan said. 

Whiting Petroleum (WLL - Get Report) was downgraded to neutral from buy at Sterne Agee. $11 price target. The company's outlook is uncertain heading into 2017, Sterne said. 

This article was written by a staff member of TheStreet.