U.S. index futures signaled losses will cascade in the world's biggest stock market as the Nasdaq 100 Index contract hit its daily loss limit of 5%.

Global Stocks:

Nikkei 18,540.68 -895.15 -4.61%

Hang Seng 21,251.57 -1,158.05 -5.17%

Shanghai Composite 3,210.9 -296.85 -8.46%

FTSE 5,922.2 -265.45 -4.29%

CAC 4,391.62 -239.37 -5.17%

DAX 9,676.64 -447.88 -4.42%

Crude oil $38.98 (-3.81%)

Gold $1156.00 (-0.32%)