Our live blog has all the news and analysis from global stock markets, which are seeing more heavy selling on Tuesday.
Data overnight showed activity in China's manufacturing sector slowed markedly in August, another signal that the world's second-largest economy is losing momentum.
U.S. equities opened sharply lower, with the Dow Jones industrial average falling more than 200 points on Tuesday while European bourses also traded lower. We'll keep you updated on all the latest major market moves.
European markets
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