10月21日，美股三大指数集体低开，道琼斯指数开盘下跌31.02点，跌幅0.07%，报43244.89点；标普500指数开盘下跌5.09点，跌幅0.09%，报5859.58点；纳斯达克综合指数开盘下跌21.27点，跌幅0.12%，报18468.29点。
热门中概股普跌，贝壳、高途跌超4%，百度、网易、爱奇艺跌超2%；
贵金属板块逆市大涨，科尔黛伦矿业涨超4%，泛美白银涨超3%；
波音涨3.4%，公司与工会达成暂定的新协议；
Spirit Airlines大涨40%，公司与美国银行达成债务再融资延期协议。
Disclaimer: Investing carries risk. This is not financial advice. The above content should not be regarded as an offer, recommendation, or solicitation on acquiring or disposing of any financial products, any associated discussions, comments, or posts by author or other users should not be considered as such either. It is solely for general information purpose only, which does not consider your own investment objectives, financial situations or needs. TTM assumes no responsibility or warranty for the accuracy and completeness of the information, investors should do their own research and may seek professional advice before investing.