For FedEx and UPS, a Cheaper Route: the Post Office

FedEx Corp. FDX +1.42% and United Parcel Service Inc. UPS +0.15% increasingly are moving their own packages through the U.S. Postal Service, putting pressure on the quasigovernmental agency and raising questions about whether the USPS is charging enough for the service. For FedEx alone, the post office delivers an average of 2.2 million packages a […]