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schuaiiza · 2021年12月03日

详细讲一下

* 问题详情,请 查看题干

NO.PZ202110140100000404

问题如下:

Simulation Approach 1 (historical simulation) differs from Approach 2 (Monte Carlo simulation) in that:

选项:

A.it is deterministic.

B.a functional form of the statistical distribution for each decision variable needs to be specified.

C.it assumes that sampling the returns from the actual data provides sufficient guidance about future asset returns.

解释:

C is correct.

Approach 1 is a historical simulation and assumes that past asset returns provide sufficient guidance about future asset returns.A is incorrect because both approaches are non-deterministic and random in nature. Approach 1 is a historical simulation, and Approach 2 is a Monte Carlo simulation.

B is incorrect because Approach 1 is a historical simulation and each random variable of interest (key driver and/or decision variable) is randomly drawn from historical data. A functional form of the statistical distribution of returns for each decision variable needs to be specified for a Monte Carlo simulation, which is Approach 2.

能麻烦再详细讲一下这道题嘛

2 个答案

星星_品职助教 · 2021年12月06日

同学你好,

Simulation analysis的两种方法都是基于randomness的。

其中Historical simulation是在历史数据中进行随机抽取;MCS是直接假设了随机变量的一个分布。

只有rolling window backtesting才是确定性(deterministic)的

星星_品职助教 · 2021年12月04日

同学你好,

这个问题提的过于泛。提问需要描述一下具体是什么地方不懂。例如题干中某句话没明白,还是答案解析中某个逻辑没想通。

这样才能有针对性的“详细讲一下”。

可以通过回复/追问具体的补充问题细节。

schuaiiza · 2021年12月05日

就是为什么这两个方法都是random的呢?

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