Signage is displayed at the Amazon.com Inc. fulfillment center in Baltimore, Maryland, U.S. (Photographer: Melissa Lyttle/Bloomberg)

FedEx Trims Amazon Ties as Retailer Flexes Delivery Muscles

(Bloomberg) -- FedEx Corp. said it wouldn’t renew its U.S. air-delivery contract with Amazon.com Inc., paring a key customer relationship as the largest online retailer deepens its foray into freig...