BRIEF-CME lowers Gold, Wheat margins for Aug, Sept 2016 By: Reuters: Company News August 17, 2016 at 17:58 PM EDT * CME lowers COMEX 100 Gold Futures (GC) maintenance margins for speculators by 10 percent to $5,400 per contract from $6,000 for Aug. and Sept. 2016 Read More >> Related Stocks: CME Group