Will Brexit Dampen FedEx’s European Ambitions? - Market Realist Brexit caused a 4.7% fall in FedEx’s (FDX) common stock. This was nearly double compared to a 2.6% fall in the price of United Parcel Service’s (UPS) share. After Brexit, the successful integration of TNT would be a big challenge for FedEx. With new processes coming into play in next few quarters, it will increase the delivery hours. This will lead to more administrative work while crossing borders. It will have a negative impact on the services. It might result in slower delivery speeds, higher costs, and fewer customers.