Dow plunges more than 1,000 points amid fears of U.S. economic slowdown CBS NewsLive updates: Global stock markets end the day sharply lower CNNMonday’s market action was a ‘tantrum’ amid a growing sell-off Yahoo FinanceDow drops 1,000 points, and Japanese stocks suffer worst crash since 1987 as markets quake worldwide The Associated PressStuart Varney: When does the stock market selloff stop? Fox Business