问题
单项选择题
The direct exchange of securities between investors without using an intermediary or the services of a broker occurs in which of the following markets（）
A. The third market.
B. The fourth market.
C. The over-the-counter market.
答案
参考答案：B
解析：
This is the definition of the Fourth Market. Recall that the Third Market is where non-member investment firms can make markets in and trade registered securities without going through the exchange.
