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Stella · 2024年06月25日

这题选对了,不过题干不是说drawback么

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NO.PZ202207040100000505

问题如下:

Which of the following is best described as a major drawback of using Thompson’s approach? It is subject to:

选项:

A.a value trap.

B.a growth trap.

C.extreme tail risk.

解释:

Solution

C is correct. The use of the rewarded factor price momentum is subject to extreme tail risk.

A is incorrect. The value trap refers to the appearance of a cheap value and is not associated with price momentum.

B is incorrect. The growth trap refers to stocks that appear to have continuing growth in earnings, not price.

看解答好像是说非正态分布用动量因子才赚钱,但是题干问的是drawback,那么选tail risk感觉有点前后矛盾

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笛子_品职助教 · 2024年06月26日

嗨,爱思考的PZer你好:


还是不太明白,我理解极端尾部风险是不好的,但是老师解答说动量测量又需要极端尾部风险,就显得很奇怪了。。像是需要一个不好的东西。还有一点,这里提到的极端尾部风险是否也包含价格疯狂上涨的小概率(好的风险)部分

对于其他投资者来说,尾部风险是不好的,同学理解正确。

但是对于一个做动量的人来说,他需要尾部风险,尾部风险对动量来说是好的。

汝之蜜糖,彼之砒霜。

只是尾部风险是小概率事件,出现的次数太少了,可能不能满足动量交易的需要,这是drawback。

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虽然现在很辛苦,但努力过的感觉真的很好,加油!

笛子_品职助教 · 2024年06月25日

嗨,努力学习的PZer你好:


Hello,亲爱的同学~

本题的问题是:使用price momentum有什么drawback。

A选项:使用价格动量会掉入价值陷阱。价格动量是指买入价格强势的股票,而价值陷阱一般涉及到买入估值很低的股票。这两者不相关,不选。

B选项:使用价格动量会掉入成长陷阱。价格动量是指买入价格强势的股票,而成长陷阱是指预测公司Earning增长快,但实际上没有那么快。一个是价格,一个是earning,并不相关,不选。

C选项:使用价格动量需要极端尾部风险。只有极端尾部风险的时候,价格才能有延续之前的强势,使用价格动量才能赚到钱。价格动量与尾部风险是相关联的,选C。

只有C与价格动量有关系,A和B均无关。

尾部风险并不是特别常见,这就是价格动量的drawback。

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就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

Stella · 2024年06月25日

还是不太明白,我理解极端尾部风险是不好的,但是老师解答说动量测量又需要极端尾部风险,就显得很奇怪了。。像是需要一个不好的东西。还有一点,这里提到的极端尾部风险是否也包含价格疯狂上涨的小概率(好的风险)部分

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