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华赞 · 2024年08月27日

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NO.PZ2023091802000064

问题如下:

A quantitative analyst at a foreign exchange (FX) trading company is developing a new factor model to be used for estimating potential risk exposures on FX trades. The analyst is evaluating potential factors to use in the model, and their effects on the performance of the model. Which of the following statements is most likely correct for the analyst to consider when developing the model?

选项:

A.

Using a large number of underlying factors will allow the model to correctly predict future exchange rates.

B.

The most important factor in predicting a country’s interest rates is the political stability of the country.

C.

The pair-wise exchange rates for currencies of developed countries can be assumed to be constant for terms shorter than 3 months.

D.

The value of a country’s currency will be negatively correlated with a factor representing changes in that country’s money supply.

解释:

D is correct. As described on p. 116, “If Country A increases its money supply by 25%

while Country B keeps its money supply unchanged, the value of Country A’s currency will

tend to decline by 25% relative to Country B’s currency.”

A is incorrect. Future exchange rates cannot be predicted with any precision.

B is incorrect. While political instability would weaken a currency, supply and demand are

the most important factors.

C is incorrect. Exchange rates should be assumed to change even in short-term time horizons.

老师,请问

XXXYYY=XXX|YYY,那么老师说了分母 的是Base,比如7RMB|USD,就是一美元等于7人民币

利率平价公式也提到


为何这道题老师讲解经典题时说A|B,就是F=S*e*(Ra-Rb)^T

是不是AB说反了


1 个答案
已采纳答案

李坏_品职助教 · 2024年08月28日

嗨,爱思考的PZer你好:


没说反。首先要掌握一个结论:利率越高的国家,其货币在远期会贴水(贬值)。这个是interest rate parity的基本结论。


再看讲义里的这个公式:

讲义里的这个XXXYYY,实际上是XXX作为base,也就是1单位的XXX = n单位的YYY。

所以讲义里的公式才写成是Ryyy是被减数(在前面),Rxxx是减数。base是减数,放在后面。


而老师的板书是把B作为base了,所以写成了F = S*e^(Ra - Rb)T



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虽然现在很辛苦,但努力过的感觉真的很好,加油!

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