The person who engages in the consigned trading of securities;

一办理受讬买卖有价证券业务之人员。

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Article 110 a person who enters a stock exchange for centralized trading of securities must be a member of the stock exchange.

第一百一十条进入证券交易所参与集中交易的，必须是证券交易所的会员。

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Agent: the person who engages in the underwriting, dealing or consigned trading of securities or engaged in internal auditing or accounting.

业务员：从事前条第二项各款有价证券承销、自行买卖、受讬买卖、内部稽核或主办会计等职务者。

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They're not trading in securities, although they would deal in securities as a part of the underwriting process.

他们不买卖证券，虽然在经营证券,是他们承销的一个环节。

耶鲁公开课 - 金融市场课程节选

It's one of the most rapidly changing, hard to keep up with areas because someone can set up an electronic exchange overnight and suddenly become a base for trading trillions of dollars of securities.

经纪业是一个变化最快的行业之一,人们很难跟上它的步伐,因为人们可以在头一天晚上,设置一个电子交易,一夜之间,他就能在证券市场赚到千亿美金

耶鲁公开课 - 金融市场课程节选

In other words, he is leaning towards the German model of a vertical silo in which a stock exchange oversees not just the trading of securities, but their clearing and settlement as well.

ECONOMIST: Borsa Italiana

Greifeld has bought exchange companies in Boston and Philadelphia, as well as Stockholm's OMX Group, with exchanges in northern Europe, to increase the trading of securities and derivatives like options and interest rate swaps.

FORBES: About Robert Greifeld

Earlier this month, the SEC settled civil charges against hedge funds Langley Partners, North Olmsted Partners and Quantico Partners in a case alleging that they engaged in illegal trading of unregistered securities in a scheme involving naked short-selling.

FORBES: Naked Shorts Seeking Cover