Amazon warns that trade protectionism could hurt business

Signage is displayed outside the new Amazon Go grocery store in Seattle, Washington, U.S., on Tuesday, Dec. 6, 2016. Amazon.com Inc. unveiled technology that will let shoppers grab groceries without having to scan and pay for them -- in one stroke eliminating the checkout line. Photographer: David Ryder/Bloomberg

Amazon.com Inc warned that government actions to bolster domestic companies against foreign competition could hurt its business, in a possible reference to US President Donald Trump's "America First" agenda. 

In a routine description of regulatory risks in its 2016 annual filing, the world's largest online retailer said "trade and protectionist measures" might hinder its ability to grow.