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第427章 熔断机制(1 / 2)

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熔断(Circuit Breaker)是一种金融市场的风险控制机制,用于在市场剧烈波动时,暂时中止证券或期货交易,以防止因恐慌性抛售或过度投机导致的市场崩盘。熔断机制是全球许多金融市场的重要保护措施之一。

熔断机制的基本概念

?定义:当市场价格波动幅度(上涨或下跌)达到预定的阈值时,交易将被暂停一段时间或全天,以平复市场情绪,让投资者有时间重新评估情况。

?目的:维护市场秩序,防止系统性风险扩散。

熔断的运行方式

1.触发条件:

?通常以市场指数(如标普500、沪深300)为基准,当价格波动幅度超过设定的百分比时触发熔断。

2.暂停时间:

?短暂停:市场暂停交易数分钟或数小时。

?全日暂停:当价格波动超过更高的阈值时,市场可能全天停止交易。

3.分级熔断:

?根据波动幅度设置不同的熔断等级,例如3%、7%、10%。不同等级对应不同的暂停时间或措施。

全球熔断机制的实例

(1)美国股票市场熔断机制

?分级设置:

?一级熔断:标普500指数下跌达到7%,暂停交易15分钟。

?二级熔断:标普500指数下跌达到13%,再暂停交易15分钟。

?三级熔断:标普500指数下跌达到20%,当日交易停止。

?适用范围:美股市场的主要指数和个股均适用。

(2)中国股市熔断机制(已取消)

?实施时间:2016年1月1日至1月8日,短暂试行后取消。

?规则:

?上证50、沪深300指数涨跌幅达到5%时,暂停交易15分钟。

?涨跌幅达到7%时,当日交易停止。

?取消原因:熔断机制在市场情绪恶化时反而加剧了恐慌,导致市场连环下跌。

(3)其他市场

?期货市场:许多期货市场(如芝加哥商品交易所)设有类似的价格限制和熔断机制,控制单日波动范围。

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