本年一位客户的总交易量是多少？
这一数量大约相当于他们购买道琼斯股票期间该股总交易量的3%。
That's the equivalent of about 3% of the Dow Jones shares traded during the period when the couple were buying.
市场人士表示，如今的总交易量比一年前减少了一半以上。复杂的交易合约已从市场上消失。
Total trade volumes have more than halved since a year ago, say market participants. Complex trades have vanished from the market.
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