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路透纽约10月24日 - 纳斯达克 交易所周四表示，10月中旬纳斯达克 的空头量上升了0.3%。
截至10月15日，空头量上升到约144.32亿股，而 截至 9月30 日为143.83亿股 。
卖空 "证券的投资者借入股票，然后卖出，期望股票下跌，这样他们就能以较低的价格买回股票，将股票归还给贷款人，并将差价收入囊中。
做空也可以是对冲策略的一部分。
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