On the New York Stock Exchange, advancers beat decliners by 2 to 1 on a volume of 1.20 billion.

在纽交所，涨股以二比一击败跌股，日均总成交量为12亿股。

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Today that responsibility falls largely on a group of high-frequency traders who make up an estimated two-thirds of stock-market volume.

现如今，这种责任感在很大程度上取决于进行高频率操作的交易员，这一团体的交易量约计占整个股市交易量的三分之二。

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The stock was the most traded among the major stocks on the BSE with a volume of 15.3 million shares, about 10 times its 30-day average.

该股是主要股票中交易量最大的股票，交易量为15.3亿美元，约10倍其30天的平均。

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To give you an idea of how widespread the problem is, a new study to be published in the Journal of Finance and Quantitative Analysis finds that option volume in a specific stock begins to surge three days before unannounced analyst upgrades or downgrades of a company.

WSJ: Insider Trading's Smart Cheats

This includes an in-depth study of the volume patterns that I use to determine the strength of a stock's trend.

FORBES: 3 Sectors Leading the Charge

Thorp may have been the first to discover that Madoff could not have been hedging his customers accounts because the actual reported volume of trading in stock options was a small fraction of the trades that he alone was claiming.

FORBES: The Card Sharp Who Cottoned Onto Madoff's Fraud In 1991