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yaokylu · 2022年02月20日

题目出错了吧?

NO.PZ2018123101000116

问题如下:

Which of the following statements comparing the Ho–Lee and Kalotay–Williams–Fabozzi (KWF) equilibrium term structure models is correct?

选项:

A.

The Ho–Lee model assumes constant volatility, while the KWF model does not.

B.

The KWF model incorporates the possibility of negative rates, while the Ho–Lee model does not.

C.

The KWF model describes the log of the dynamics of the short rate, while the Ho–Lee model does not.

解释:

C is correct. The Kalotay–Williams–Fabozzi equilibrium term structure model is similar to the Ho–Lee model in that it assumes constant drift, no mean reversion, and constant volatility, but the KWF model describes the log of the dynamics of the short rate, while the Ho–Lee model does not.



Ho–Lee and Kalotay–Williams–Fabozzi (KWF) 是 arbitrage-free term structure model 吧?

为什么题目要说是 Equilibrium Model呢?


1 个答案

pzqa015 · 2022年02月21日

嗨,努力学习的PZer你好:


是的,这里表述不太准确,Equilibrium model是CIR model与Vmodel。同学很认真,加油!

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加油吧,让我们一起遇见更好的自己!

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