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In August 1st, the Zhengzhou Mercantile Exchange announcement said, according to the "Zhengzhou commodity exchange futures trading risk control management measures" provisions of article tenth, it was decided that since August 3, 2016 settlement, manganese silicon standard futures contracts trading margin from 5% to 7%, the price limit board range from 4% adjusted to 6%. According to the rules of the implementation of the provisions of the margin trading standards and price limits is higher than that of the standard contract, according to the original provisions.