The exchange operator, parent of the Chicago Board of Trade, raised margins on gold futures for speculators to $5, 500 per contract from $4, 500 a contract.
芝加哥期货交易所（Chicago Board of Trade）的母公司CME集团是COMEX的运营商，此次调整意味着黄金炒家在进行黄金期货交易时，每份期货合约所要提供的维持保证金从之前的4 500美元上调至5 500美元。
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But recent steel, aluminum, such as coal, oil price, and raw materials appeared worldwide to bring increased cost RMB appreciation, currency exchange auto parts export margins.