如果你曾经交易股票每分钟,你知道市场是开放的股票在每个价格。这个价格波动。有时价格时可能出现剧烈波动,所以它开始时下降了2%,3%。
然后,在美国东部时间下午4点,一切都变了。突然,价格停止波动,剩下4点收盘价。从本质上说,股票是假死。
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然后,当市场再次打开9:30分,价格突然变化,波动再次开始。开盘价可能几乎相同的前一天的收盘价,但它可能不是。一夜之间,从公司的坏消息可能低价格暴跌25%,股价“差距”25%。或者一个的好消息可能需要价格高10%,和股票“差距”。All of which brings up an interesting question: How does a stock exchange like NASDAQ pick the opening price? How does it make sure that the opening price is fair? In this article, we'll go behind the scenes at NASDAQ and learn about a process known as the "opening cross."