Coking-coal futures to rocket to their highest monthly volume during October as market participants turned to derivatives to hedge against volatility.

Uncertainty around Chinese-Australian trade relations has impacted the seaborne coking-coal market, leading to mixed sentiment and price fluctuations throughout October, according to London-based inter-dealer brokerage SSY Futures.

This has led to companies using derivatives to manage their exposure and price risk and speculate against the physical market, according to the...