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投资者可以进行盘前（美国东部时间上午 4:00 - 9:30） 和盘后（美国东部时间下午 4:00 - 8:00） 交易。做市商和 ECN 严格自愿参与，因此，这些时段的流动性和价格会比较低。在这种环境下，股票价格也可能波动更快。强烈建议在此期间参与交易的投资者使用限价单。