(0.8 x 5% x 25,000)/2,500=0.4
( 0.8 x 5% x 25,000*2(口) )/( 2,500*2(口) )=0.4
10. COMEX 的銅期貨原始保證金為$2,500,交易人以$0.80/鎊的價..-阿摩線上測驗
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