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Why the stock market tumbled Wednesday, ushering in its worst start to a quarter in about 2 years

MarketWatch
Why the stock market tumbled Wednesday, ushering in its worst start to a quarter in about 2 years

It has been an ugly stretch for U.S. stocks, which was capped by Wednesday's more-than-830-point tumble for the Dow Jones Industrial Average. To recap: The Dow DJIA, -3.15% and the S&P 500 index SPX, -3.29% booked their worst one-day slumps since Feb. 8, while the Nasdaq Composite Index COMP, -4.08%