sell for a fall的意思|示意

Why would a sensible person watch the value of his home fall for years, only to sell for a big loss?

为什么总是一个明智的人看着他的房屋价值下降多年，只得亏本出售。

An HFT might, for instance, lock in a high price by submitting a large sell order to a dark pool just as the exchange price of a share begins to fall.

例如，股票的交易所价格开始下跌时，一个高频交易者可能提交一个大卖单给资金暗池从而锁定当时的高价。