Iron ore futures are surging, partly in response to the decision by China today to weaken its currency.
Approaching the mid-session break the most actively traded January 2016 contract on the Dalian commodities exchange is currently up 3.39% at 381.5 yuan.
According to contract specifications outlined by the exchange, the contract cannot move more than 4% in either direction during any one trading session.
Overnight the January 2016 contract had settled up more than 1%.
With the contract denominated in yuan, the near 2% depreciation in the currency largely explains the surge seen in trade today.