Chipotle (CMG) is upgraded by JPMorgan to an Overweight rating from Neutral.
Oppenheimer thinks investors should buy shares of the restaurant chain on any weakness.
Last week, Chipotle reported sizzling comparable store sales growth in Q1, but also noted it was getting hit by higher food input costs.
What to watch: An across-the-menu price increase from Chipotle is expected something this year.
CMG +1.0% to $524.53 premarket