Amazon shares closed up 15.32% on Friday, the biggest one-day jump since April 2012, after the company reported accelerating AWS revenue (Spencer Soper/Bloomberg)

Spencer Soper / Bloomberg: Amazon shares closed up 15.32% on Friday, the biggest one-day jump since April 2012, after the company reported accelerating AWS revenue — Amazon.com Inc. shares surged the most since 2012 after the company reported accelerating cloud-computing revenue, easing investors' concerns …