FedEx (FDX) stock is spiraling Friday after the logistics giant missed top- and bottom-line expectations for its fiscal first quarter and revised its full-year outlook.In the quarter ended August 31, FedEx's revenue decreased 0.5% year-over-year to $21.6 billion and its earnings per share (EPS) plunged 20.9% from the year-ago period to $3.60.In a statement, FedEx CEO Raj Subramaniam called the quarter "challenging." However, he added that the company remained "focused on transforming our network, improving ...