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发表于 2014-3-22 12:32 AM
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hotday 发表于 2014-3-22 12:22 AM
可能数据出错,钱会收回去。
Calculating the Settlement Price
These indexes also have a final or closing price. But that price is NOT a real-world price determined at any specific time. Instead, the opening price of each component of the index is determined
on the morning of the 3rd Friday of the expiration month. These options do not trade on Friday. The last time they trade is the previous day (Thursday afternoon). Once all stocks in the index have opened for trading on Friday morning, the settlement price is calculated – as if all stocks in the index were trading at that opening price at the same time. Because all stocks in the index never trade at their opening prices at the same time, the settlement price is not a real price. The official price is not published until hours after the opening (in some cases, not until the end of the day).
Many times the official settlement price is higher than the day’s official high or lower than the day’s official low, resulting in confusion for traders who do not understand the process. This occurs because the index price is not a real world price. Suppose the market is bullish at the opening. Often, those buyers push stocks to the highest price of the day. When stocks open at different times, some stocks will have already begun to trade at lower prices, and the ‘current’ index price reflects those lower prices. But remember, the settlement price counts only those opening ‘high’ prices. Thus, the settlement price can easily exceed the highest price seen for the index during the day. |
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