Higher interest rates on government debt from Italy, Spain and other European countries helped send stock markets in Germany and France down more than 1 percent Tuesday.
Wal-Mart Stores Inc. fell 2 percent in premarket trading after the retail giant posted a drop in quarterly earnings.
Later this morning, the government will report on retail sales in October. Economists forecast that sales rose 0.4 percent last month, a slower pace than in September.
Less than two hours before the opening bell, Dow Jones industrial average futures are down 107 points, or 1 percent, to 11,953. S&P 500 index futures are down 12, or 1 percent, to 1,240. Nasdaq 100 futures are down 22, or 0.9 percent, to 2,321.