滿期日，截止日期
expiration date
(1)指價值股票，諸如購股權或購股權証到期，而且不再具有價值。(2)在到期前，上市股票期權合同能被之行的最后一天。目前是到期月份的第三個星期五后的那個星期六。
(1) refers to the value of shares, such as options or purchase warrants expire and no longer have value. (2) prior to expiration of stock options contracts listed on the last day of the trip can be. Currently the Saturday following the third Friday of the expiration month after.