Wall Street traded sharply lower, with the Dow Jones down more than 300 points, or 1.9%, at 16,215.
European markets also fell, with the London’s FTSE 100 closing down 3% and France’s CAC 40 and Germany’s DAX about 2.4% lower.
Earlier, figures for August showed China’s manufacturing contracted at its fastest pace in three years.
The official manufacturing purchasing managers’ index (PMI) dropped to 49.7 from 50 in July. A figure below 50 indicates contraction.
It follows recent turmoil in the markets sparked by concerns over a slowdown in the world’s second-largest economy.
Energy companies led the way down on the Dow, with Chevron and Exxon Mobil down about 3%. This followed a fall in the oil price, which was down more than 4% at $51.89.
Before Tuesday’s fall, the price of oil had risen by about 25% in the past three trading sessions.
The S&P 500 was also down about 2% at 1,934.18, while the tech-heavy NASDAQ was 1.6% lower at 4,699.21.
Global markets sustained heavy losses in August – for both the UK’s FTSE 100 and the US’s S&P 500, it was the worst month since May 2012.
As well as the weak China factory data, investors are unsure about the US Federal Reserve’s next move. Many had penciled in the a rate rise – the first move since the financial crisis – for September. However, given the recent stock turmoil, analysts seem less certain.
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