Stocks fell on Friday as Wall Street ended one of its worst weeks in months. $Apple(AAPL)$ $Amazon.com(AMZN)$ Analysts say traders reacted to a nasty FedEx earnings warning about the global economy...The Dow Jones Industrial Average fell 139.40 points, or 0.45%, to close at 30,822.42.The S&P 500 lost 0.72% to end the week at 3,873.33. $S&P 500(.SPX)$ The Nasdaq Composite slipped 0.90% to end at 11,448.40. The worst week for the S&P 500 and the Nasdaq since June...$NASDAQ(.IXIC)$