[CFA入门] [求助]level one 请教Integrity of Capital Markets 中有几句话的理解 专业, only, possession, customer, material

jerrywang0

在notes里这样写的，没明白什么意思。
Recommended Procedures for Compliance

Prohibition of all proprietary trading while a firm is in possession of material nonpublic information may be inappropriate because it may send a signal to the market.

* In these cases, firms should take the contra side of only unsolicited customer trades.

主要是标*的那句不理解，自己专业知识不够，望专业人士解释下，最好带上个例子。谢谢