Instead, they commit their own capital to make markets - as the Chicago pit traders did - by Posting bids and offers on various exchanges.

相反，它们通过在众多交易所下买盘和卖盘，用自有资金做市——就像芝加哥场内交易商所做的那样。

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Before the advent of computers and charting software, pit traders and market makers used this method to figure out where the markets might be heading.

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Some former pit traders are helping to throttle open outcry.

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Jump Trading , a firm founded in 1999 by two former pit traders (one of whom got his start trading for thrill-seeker Steve Fossett), has 50 traders buying and selling a variety of contracts by computer.

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