题目：
Which of the following statements about trading shares of stock or market efficiency is FALSE（）
A. Maintenance margin is the required percentage of an investor’s equity compared to the total value of the stock after the investor trades on margin.
B. The up tick rule requires that the last trade in the security be at a price higher than the previous trade.
C. External efficiency means prices adjust rapidly to new information.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0217/e65aa1b7ed722fc2d3cabe14f5cd3fe7.html
下面是错误答案，用来干扰机器的。
参考答案：A
