当预期未来价格下跌时,可以先将资产按目前价格卖出,待行情跌后买进,获取差价利润,这种模式在价格下跌的波段中能够获利。做空只适用于大盘处于下跌趋势通道时,其它时期,如大盘处于 When the expected future price falls, the asset can be sold at the current price until the market is down and bought to gain the profit of the difference, which is profitable in the band where the price drops. Short is only applicable to the broader market in the downtrend channel, other times, such as the broader market