By Tony Owusu There’s lots of growth in the segment, but profits are proving challenging. The ascent of online shopping via e-retailers like Amazon (AMZN) – Get Amazon.com, Inc. Report has resulted in a boon in the ground business for shipping companies like FedEx (FDX) – Get FedEx Corporation Report and UPS (UPS) – Get United Parcel Service, Inc. Class B Report. This boon is especially pronounced during the holiday season as consumers do much of their holiday shopping online, a trend that was accelerated during the coronavirus pandemic over the past two years. FedEx for example now reports Gr…