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relaxchair 发表于 2014-11-25 15:22 
这样吧,你明天10点前再看,或者看看别的任何一直股票。开盘前和收盘后的信息基本上是乱的。没什么作用。 ...
退十万步来说,这些“乱七八糟”的数据是哪里来的?
请参考,也给34楼呗!
Extended hours trading is stock trading that happens either before or after the normal trading hours of a stock exchange, either pre-market trading or after-hours trading.
After-hours trading is trading that occurs after the traditional trading hours of the major exchanges, such as the New York Stock Exchange and the Nasdaq Stock Market. Since 1985, the regular trading hours in the United States have been from 9:30 a.m. to 4:00 p.m. Eastern Time (ET).[1]
Trading outside these regular hours is not a new phenomenon but previously was limited to high net-worth investors and institutional investors like mutual funds.[2] The emergence of private trading systems, known as electronic communication networks or ECNs, has allowed individual investors to participate in after-hours trading.
After-hours trading on a day with a normal session occurs from 4:00 p.m. to 8:00 p.m. ET.[3]
Trading also occurs before the traditional trading hours and is known as pre-market trading. Pre-market trading occurs from 4:00 a.m. to 9:30 a.m. ET.[4] Financial Industry Regulatory Authority (FINRA) members who voluntarily enter quotations during the after-hours session are required to comply with all applicable limit order protection and display rules (e.g., the Manning rule and the SEC order handling rules).[5]
http://en.wikipedia.org/wiki/Extended_hours_trading |
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