China's commodities spiralled lower on Monday, after steel futures suffered their worst week since 2009. 

In mid-day trading, rebar declined 5.9 percent and hot roll was down 5.6 percent, while iron ore and coke dipped 5.1 and 4.3 percent, respectively. Measures implemented by future exchanges to cool the overheating market showed their effects last week, with coke, coking coal and rebar suffering their biggest-ever weekly losses.