银行承做着销售证券的经营。

Banks are in the business of selling securities.

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黑石集团公开销售证券，但专家认为证券公司应该发出警告：散户不适合购买此类股票。

Public offerings by the Blackstone Group and other buyout firms raise red flags for retail investors, experts contend.

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他们可能会从销售的证券那里得到佣金；可能收取管理费，固定的或是按照为你管理资产的比例收取；可能按照小时收费；或是包括以上所有方式。

They may get a commission on the securities they sell; charge fees, either flat or a percentage of the assets they manage for you; work at an hourly rate; or a combination of all of them.

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That is, arranging for the issuance by corporations of stocks and bonds.

也就是，帮助公司安排销售,证券和股份。

耶鲁公开课 - 金融市场课程节选