The content originally appeared on: CNN New York CNN Business - FedEx shares plunged 21% in premarket trading Friday after it warned last Thursday that a slowing economy will cause it to fall $500 million short of its revenue target. A weakening global economy, particularly in Asia and Europe has hurt FedEx's express delivery business. The company said demand for packages weakened in the final weeks of the quarter. The company said it is responding by reducing flights and temporarily […]