[問題] 請問當日沖銷所需保證金 是什麼意思?
小的在網路上看到這個..
http://tinyurl.com/2cpq8v8
小的只知道維持保證金這東西..
沒聽過..
當日沖銷所需保證金
哪位高手可以幫我解答一下嗎?
非常感謝.
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