UPS shares tumbled after its outlook for volume and profit margins underwhelmed investors looking for stronger signs of improvement as the courier unwinds its relationship with Amazon.com Inc. UPS CEO Carol Tomé says the Amazon glide down “is behind us.” In place of the low-margin e-commerce packages that Tomé has said were “dilutive” to profits, UPS is focusing now on fewer parcels that yield higher margins. She speaks to host Romaine Bostick.