7-percent slide in Chinese shares, sparked by weak economic data, rekindled worries over global growth on the first day of trading in 2016
crude prices retreated on worries that the weak Chinese data could portend slower global growth, which also hurt Wall Street and sent key indexes down more than 2 percent.
Emerging markets were especially hard-hit by the China data, with MSCI's index .MSCIEF tumbling 3.4 percent.
China's yuan currency CNH=D3CNY= hit its lowest in more than four years after the central bank lowered its guidance rate and factory activity contracted for a 10th straight month in December, at a sharper pace than in November.
Stocks in Europe tumbled, with Germany's DAX index .GDAXI closing down 4.28 percent and the pan-European FTSEurofirst 300 index .FTEU3 falling 2.53 percent at 1,401.16.
The selloff in China triggered a circuit-breaker that suspended equities trading nationwide for the first time and put at risk months of regulatory work to restore market stability.