Under normal operation environment, the closing price of a stock is
    determined by taking the median of 5 nominal prices in the last minute ofthe trading hours.
    The system will take up 5 snapshots on the nominalprices at 15-second interval starting from 3:59:00 p.m……
    The followingexample will illustrate the calculation:
    　　　　　　　Bid Ask Last　　Nominal
    Snapshot Time Price Price Recorded Price Price *
    1st 3:59:00 p.m. $39.40 $39.50 $39.50 $39.50
    2nd 3:59:15 p.m. $39.40 $39.50 $39.50 $39.50
    3rd 3:59:30 p.m. $39.40 $39.50 $39.40 $39.40
    4th 3:59:45 p.m. $39.30 $39.50 $39.40 $39.40
    5th 4:00:00 p.m. $39.20 $39.30 $39.30 $39.30
    The five snapshot nominal prices are arranged in ascending order asfollows:
    $39.30, $39.40, $39.40, $39.50, $39.50
    The median (i.e. the middle one) is $39.40, which will then be taken asthe closing price.
    Choosing the median of five snapshot nominal pricesensures that the closing price will not be biased by one single trade.
    * The nominal price is determined by comparing the current bid price, the current ask price and the last recorded price in accordance with Rule 101 of the Rules of the Exchange.
    收市價(jià)的計(jì)算
    在正常運(yùn)作情況下，股份的收市價(jià)是按交易日最后一分鐘內(nèi)五個(gè)按盤價(jià)的中位數(shù)計(jì)算。
    系統(tǒng)由下午三時(shí)五十九分正開始每隔十五秒錄取股份按盤價(jià)一次，一共攝取五個(gè)按盤價(jià)。
    現(xiàn)舉例如下:
    攝取 時(shí)間 買盤價(jià) 沽盤價(jià) 最后錄得價(jià) 按盤價(jià) *
    第一次 下午3:59:00 $39.40 $39.50 $39.50 $39.50
    第二次 下午3:59:15 $39.40 $39.50 $39.50 $39.50
    第三次 下午3:59:30 $39.40 $39.50 $39.40 $39.40
    第四次 下午3:59:45 $39.30 $39.50 $39.40 $39.40