United Parcel Service (UPS) is one of the stocks most watched by Zacks.com visitors lately. So, it might be a good idea to review some of the factors that might affect the near-term performance of the stock. Over the past month, shares of this package delivery service have returned +2.5%, compared to the Zacks S&P 500 composite's +4% change. During this period, the Zacks Transportation - Air Freight and Cargo industry, which UPS falls in, has gained 0.2%. The key question now is: What could be the stock's f ...