Stock futures and interest rates are tumbling after fresh signs of a global economic slowdown spooked investors.
Asian markets have plummeted Tuesday on weak Japanese economic data. European markets are falling after Greek workers are again protesting austerity measures.
The yield on the 10-year Treasury note is down below 3 percent for the first time since April 2009.
Investor worry about the economy has spread to consumers. A report due out Tuesday is expected to show consumer confidence fell in June.
Dow Jones industrial average futures are down 108, or 1.1 percent, at 9,980. Standard & Poor's 500 index futures are down 12.90, or 1.2 percent, at 1,058.00, while Nasdaq 100 index futures are down 26.50, or 1.4 percent, at 1,809.50.
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