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阿里巴巴股票讲解什么是股市熔断 熔断机制都有哪些影响
Admin 2020-10-22 14:00
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禁止南财非法采集
2019年7月22日注定是不平凡的一天。科创板的锣首日。市场异常火爆。多只股票多次涨停。新市场的涨跌幅会有什么变化也十分惹人注目。作为股市风险控制措施。我们也不能忘了曾经短暂在A股出现过的股市熔断。也就是熔断机制。
熔断机制也叫自动停盘机制。是指当股指波幅达到规定的熔断点时。交易所为控制风险采取的暂停交易措施。熔断机制最早起源于美国。1982年美国芝加哥商业交易所曾实施过此制度。但随后在1983年就被废除。直到1987年由于没有熔断机制和涨跌幅限制而出现股灾人们才又重新考虑此机制。
国外交易所采取的股市熔断机制一般有两种形式。“熔即断”和“熔而不断”;“熔即断”是指当价格触及熔断点后。随后的一段时间内交易暂停;“熔而不断”是指随后的一段时间内交易申报在熔断价格区间内继续撮合成交。目前国际上使用较多的是“熔即断”的机制。
2015年6月份。我国股市也出现过一次股灾。下跌幅度近45%。为了降低股市剧烈波动。2016年1月1日正式实施股市熔断制度。然而仅仅过了7天就暂停实施指数熔断机制。而且出现了历史性的记录。1月7日全天交易仅15分钟。当时发布指数熔断相关规定是熔断基准指数为沪深300指数。采用5%和7%两档阈值。也就是说当沪深300指数当日开市下跌超过5%时。引发熔断。交易所暂停所有交易15分钟。恢复交易之后如果没有跌到7%就继续交易。一旦跌至7%就暂停所有交易至收市。
股市熔断机制作为一种保护机制。有着其特有的价值。美国股市自1988年引入熔断制度至今没再发生过股灾。起作用功不可没。也希望中国股市在之后的发展中能找到合适自己的熔断机制方案。让中国股市更加欣欣向荣。
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阿里巴巴股票
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