Note: Coupon offers do not have the disable option but you can edit the quantity of USES or the expiration date to end the offer early.
注：优惠券折扣无撤销选项，但是您可以通过修改使用次数和有效期限来提前结束折扣。
The last date on which the option may be exercised is called the expiration date or the maturity date.
期权存在的最后一天称为失效日或者到期日。
A call is option that gives the buyer the right, but not the obligation, to purchase the underlying futures contract at the strike price on or before the expiration date.
看涨期权赋予买方以权利，但不必负有义务，在期权到期日当天或到期之前，按敲定价格买进相关期货合约。
When the time reaches to the option expiration date, there is no more time value for that option.
当期权到期的时间到达，没有更多的时间价值，选择。
A put is an option that gives the buyer the right, but not the obligation, to sell the underlying futures contract at the strike price on or before the expiration date.
看跌期权赋予买方以权利，但不必负有义务，在期权到期日当天或者到期之前，按照敲定的价格卖出相关期货合约。
A put is an option that gives the buyer the right, but not the obligation, to sell the underlying futures contract at the strike price on or before the expiration date.
看跌期权赋予买方以权利，但不必负有义务，在期权到期日当天或者到期之前，按照敲定的价格卖出相关期货合约。
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