Weak economic news and airstrikes against militants in Syria sent global stock markets lower.
The biggest declines came in Europe, where France's benchmark index fell sharply. The selling was more modest in Asia and the U.S., where the economy remains healthier.
The Dow Jones industrial average fell 116 points, or 0.7 per cent, to 17,055 Tuesday.
The Standard & Poor's 500 fell 11 points, or 0.6 per cent, to 1,982. The Nasdaq composite fell 19 points, or 0.4 per cent, to 4,508.
CarMax plunged 9 per cent after reporting earnings that fell short of analysts' expectations.
European markets fell after a closely watched gauge of business activity in the eurozone fell to a nine-month low this month.
Bond prices rose. The yield on the 10-year Treasury note fell to 2.53 per cent.
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