Last year ETFs accounted for 9% of all trading volume in America's equity markets but nearly two-thirds of the value of all fails.

去年的交易所交易基金占美国证券市场交易总量的9%，但几乎三分之二的交易值交易失败。

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Of course, low volume during August trading has exacerbated market swings.

当然，8月份的成交量清淡加剧了市场的波动性。

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Some big exchanges reckon that at least one-third of their trading volume comes from these programs.

一些大型交易所估计至少有三分之一的交易来自于这些程序。

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The volume of trading increases the amount of cost savings, not the amount of reductions.

ECONOMIST: Farming the land

Companies supply the earnings, and the volume of trading in their shares reflects investor demand for them.

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But judging by the volume of trading, these securities are loved by investors.

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