Intense Competition: The parcel delivery market is highly competitive, with significant pressure from rivals like FedEx, Amazon Logistics, and various regional and national postal services, potentially leading to pricing pressures and market share erosion.

Fluctuating Fuel Costs: As a company with extensive air and ground fleets, UPS is highly susceptible to volatility in fuel prices, which can significantly impact operating expenses and profitability if not effectively hedged or passed on to customers.

Labor Relations and Strikes: A substantial portion of UPS's workforce is unionized (Teamsters), presenting risks associated with contract negotiations, potential strikes, and increased labor costs that could disrupt operations and harm reputation.