NO.PZ2020042003000032
问题如下：
Which of the following statements aboutliquidity black holes is correct?
选项：
A.
Liquidity black hole happensONLY when everyone wants to sell, and no one wants to buy.
B.
During the sell-off,liquidity dries up and the asset can be sold only at a fire-sale price.
C.
When Liquidity black hole happens, if an assetprice gets low (high), traders will move in and buy (sell).
D.
Whennegative feedback traders dominate, Liquidity black hole could easily happen.
解释：
考点：对Liquidity Black Holes的理解
答案：B选项表述正确，本题选B。
解析：
A选项表述错误，Everyonewants to buy and no one wants to sell也是Liquidity blackholes
关于Liquidity black holds的定义：As everyone wants to sell and no one wants to buy, or vice versa.
C选项错误，C选项描述的情况依然存在流动性。
D选项描述错误，当Negativefeed back traders dominate时，市场依然存在流动性。
选项 a 少定义中的相反情形，vice versa 流动性黑洞情况里，每个人都想买没有人想卖，麻烦可以举个例子呢，跟常识有点相违背。
