Chinese metallurgical or coking coal futures soared to a two-week high as supply concerns resurfaced, pushing prices of steelmaking ingredient coke higher.
The most-traded January coking coal DJMcv1 on China's Dalian Commodity Exchange rose as much as 7.7% to 3,044 yuan ($470.62) a tonne, its strongest since Sept. 10. It was up 6.2% at 3,002 yuan, as of 0700 GMT.
Coke DCJcv1 advanced 4.1% to 3,482 yuan a tonne.
Coking coal and its processed form - coke - are this year's top gainers in China's ferrous metal complex.
Dalian coking coal has risen more than 80% this year as top steel producer China struggles with tight supply following a ban on Australian coal, disruptions in Mongolian shipments and weak domestic output due to mine safety restrictions.