Benchmark raised its price target on Roku to $300 from $185.
RBC upgraded Yelp to outperform from sector perform.
Wells Fargo upgraded Advanced Micro Devices to overweight from equal weight.
UBS upgraded Mattel to buy from neutral.
RBC upgraded Zillow to outperform from sector perform.
Piper Sandler downgraded Electronic Artis to neutral from overweight.
Citi upgraded Square to buy from neutral.
Jeremy Stoppelman, chief executive officer of Yelp Inc., center, rings the opening bell with Chief Operating Officer Geoff Donaker, second left, and Chief Financial Officer Rob Krolik, right, at the New York Stock Exchange (NYSE) in New York, U.S., on Friday, March 2, 2012.