UPS and FedEx shares tumble as Amazon's cheap delivery threatens their business

Shares in UPS and FedEx tumbled after an analyst warned that Amazon is offering inexpensive and increasingly fast delivery services to third-party sellers, posing a direct threat to traditional shippers. Amazon's expanding logistics network is seen as a growing competitive risk for both companies. The sell-off reflects investor concern about the long-term market position of UPS and FedEx.