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PZmomo · 2024年03月17日

STEP1和2为什么错

NO.PZ2018123101000113

问题如下:

Thames reminds Cromwell that her model assumes zero interest rate volatility and a flat government yield curve. Cromwell responds that Thames should relax these unrealistic assumptions. Thames outlines the steps to take in valuing risky bonds under this scenario in Exhibit 1.

EXHIBIT 1 STEPS IN VALUING RISKY BONDS, ARBITRAGE-FREE FRAMEWORK


Which step in Exhibit 1 regarding valuing risky bonds has Thames most likely outlined correctly?

选项:

A.

Step 1.

B.

Step 2.

C.

Step 3.

解释:

Thames is correct in describing Step 3 but incorrect about both Step 1 and Step 2.

The third point in Step 1 is explained incorrectly. The par curve where each bond is priced at par value, not the spot curve, is used to derive implied zero-coupon rates. In the second point of Step 2, she is incorrect regarding the recovery rate. The assumption is not based on credit ratings. The recovery rate if default were to occur should conform to the seniority of the debt issue and the nature of the issuer’s assets. For instance, a firm with a high ratio of assets relative to the debt level and debt senior in the capital structure will result in a higher recovery for bondholders than one with the reverse situation.

没有看懂。。。

2 个答案

品职答疑小助手雍 · 2024年03月18日

emmm你是想说信用评级确定PD吧?只能说评级越高确实PD会越低,但是也就只能决定一个区间。具体pd的数值还是的模型来定

品职答疑小助手雍 · 2024年03月17日

同学你好,

第一步:错在第三句话,它说用spot curve,来推导出zero coupon rate和DF,应该是用par curve推导出spot rate(zero coupon rate)和DF。

第二步:错在说根据公司的信用评级来确定recovery rate,recovery rate与公司的信用评级无关,与债项的优先劣后顺序有关,优先级债券的RR很高,劣后级债券的RR很低。

PZmomo · 2024年03月18日

公司的信用评级是确定pod的对吧?

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