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BEIJING: The Dalian Commodity Exchange said on Wednesday it will restrict the daily trading volume of coke futures contracts to a maximum of 500 lots per day for non-futures company members or clients.

The new rule, which calculates the volume as the total of buy and sell open positions on a single contract, will take effect from the trading session on June 12. Hedging and market-making activities will remain exempt from the restriction, the exchange added.