RATINGS CHANGES

Arther J. Gallagher (AJG) - Get Report was upgraded to market perform from underperform at William Blair. The industry has solid organic growth prospects and low valuation risk, William Blair said. 

Affiliated Managers (AMG) - Get Report was added to the conviction buy list at Goldman Sachs. $190 price target. The stock is deeply discounted, even though the company should see a sharp turnaround in asset flows, Goldman said. 

Copart (CRPT) was downgraded to neutral from buy at Bank of America/Merrill Lynch. The valuation is no longer as attractive, based on a $42 price target, analysts said. 

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

Fiserv (FISV) - Get Report was downgraded to perform from outperform at Oppenheimer. The valuation is no longer as attractive, given the stock's 11% year-to-date gain and after the stock outperformed in 2015, Oppenheimer said.  

Knight Transportation (KNX) - Get Report was downgraded to market perform from outperform at Cowen. $26 price target. The company lacks near-term catalysts, Cowen said. 

Norfolk Southern (NSC) - Get Report was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: NSC.

Qlik (QLIK) was upgraded to overweight Pacific Crest. $34 price target. Expect that Sense licensing revenue can triple over the next three years, Pac Crest said. 

Sherwin-Williams (SHW) - Get Report was downgraded to sector weight at Keybanc. The company is paying a full price for Valspar and taking a lot of new debt, Keybanc said. 

Symantec (SYMC) - Get Report was upgraded to overweight from neutral at Piper Jaffray. $24 price target. Growth from new products and increased buybacks should drive the valuation lower, Piper said. 

U.S. Steel (X) - Get Report was downgraded at Jefferies to underperform from hold. Valuation isn't as attractive, based on a $10 price target.

This article was written by a staff member of TheStreet.