问题如下：
Smith, a research analyst with a brokerage firm, decides to change his recommendation for the common stock of Green Company, Inc., from a "buy" to a "sell." He mails this change in investment advice to all the firm’s clients on Wednesday. The day after the mailing, a client calls with a buy order for 500 shares of Green Company. In this circumstance, Smith should:
选项：
A. Accept the order.
B. Advise the customer of the change in recommendation before accepting the order.
C. Not accept the order because it is contrary to the firm’s recommendation.
解释：
B is correct.
This question involves Standard III(B) –Fair Dealing. Smith disseminated a change in the stock recommendation to his clients but then received a request contrary to that recommendation from a client who probably had not yet received the recommendation. Prior to executing the order, Smith should take additional steps to ensure that the customer has received the change of recommendation. Answer A is incorrect because the client placed the order prior to receiving the recommendation and, therefore, does not have the benefit of Smith’s most recent recommendation. Answer C is also incorrect; simply because the client request is contrary to the firm’s recommendation does not mean a member can override a direct request by a client. After Smith contacts the client to ensure that the client has received the changed recommendation, if the client still wants to place a buy order for the shares, Smith is obligated to comply with the client’ s directive.
这一题没太看懂。为什么客户买了一个和基金经理推荐的相反的股票，为啥不给人操作？还要给他提建议。这不是违反交易原则么？
