They had raised concerns about its performance in comparison to rival United Parcel Service Inc UPS.N, which has a unionized workforce. March 17 (Reuters) - Shares of FedEx Corp FDX.N surged over 11% before the bell on Friday, after aggressive cost cuts helped the freight bellwether lift its profit forecast despite falling e-commerce package volumes. However, package volumes are set to remain under pressure in the coming months, FedEx warned, further clouding outlook for the e-commerce and freight sectors that are already grappling with high inflation and could face further challenges from the recent banking crisis.