for the account and risk of meaning in English

(证券交易所的经纪人) 代…买卖而盈亏由…自负

The customer may instruct and authorise the bank on behalf of the customer to sell , assign , transfer or deliver any securities and to purchase additional investments in securities for the account and risk of the customer to be deposited with the bank under the terms of these conditions provided that the bank shall be under no obligation to purchase additional investments in securities unless arrangements satisfactory to it relating to the payment of the purchase price have previously been made and in this connection the bank is authorised to instruct such brokers , dealers or other agents who may be associated or otherwise connected with the bank as it may select in the absence of any instructions to the contrary
客户可根据此等条件之条款，指示及授权本行代客户出售转让让与或送递任何证券，以及代客户及在客户承担风险的前提下购入额外证券投资项目，以根据此等条件的条款存放于本行内惟本行应无责任购入额外证券投资项目，除非之前已就买价的支付作出了令本行满意之安排，就此而言，本行获授权在没有任何相反指示的情况下指示其选定之经纪交易商或其他代理其可以是与本行联营或以其他方式与本行相关。