“成交量”的英语？

有700多万股换手，是通常日平均成交量的3倍。More than 7 million shares changed hands, treble the normal daily average.昨天拍卖之前的成交量很小。Trading was very light ahead of yesterday's auction.这产品的成交量很高, 每天可出三批货.This product has a fast turnover, ...