Short seller指的是进行short selling做空的人。

做空是股票期货市场常见的一种操作方式，操作为预期股票期货市场会有下跌趋势，操作者将手中筹码按市价卖出，等股票期货下跌之后再买入，赚取中间差价。做空是做多的反向操作，理论上是先借货卖出，再买进归还。

一般正规的做空市场是有一个第三方券商提供借货的平台。通俗来说就是类似赊货交易。这种模式在价格下跌的波段中能够获利，就是先在高位借货进来卖出，等跌了之后再买进归还。这样买进的仍然是低位，卖出的仍然是高位，只不过操作程序反了。

Short selling is when a trader borrows shares from a broker and immediately sells them with the expectation that the stock price will fall shortly after. If it does, the trader can buy the shares back at the lower price, return them to the brokerage and keep the difference as profit.

以下为相关双语示例，供参考：

Techniques employed by short sellers may drive down the trading price of the ADSs. Short selling is the practice of selling securities that the seller does not own but rather has borrowed from a third party with the intention of buying identical securities back at a later date to return to the lender. The short seller hopes to profit from a decline in the value of the securities between the sale of the borrowed securities and the purchase of the replacement shares, as the short seller expects to pay less in that purchase than it received in the sale. As it is in the short seller’s interest for the price of the security to decline, many short sellers publish, or arrange for the publication of, negative opinions regarding the relevant issuer and its business prospects in order to create negative market momentum and generate profits for themselves after selling a security short. These short attacks have, in the past, led to selling of shares in the market.

做空指向第三方借入证券然后卖出，过一段时间后，买入相同证券予以归还。做空者希望通过卖出借入证券至买入替换证券期间证券价值的下跌谋取利益，因为做空者预期买入价格低于其卖出价格。由于证券价格下跌符合做空者的利益，很多做空者发表或安排发表与相关发行人及其经营前景有关的不利意见，以制造不利的市场走势，从而通过做空谋取利益。这些做空行为过去曾导致市场抛售。