FRM考試中,違約相關(guān)性較低,CDO價值升高,為什么答案是A。下文是詳細解答,一起了解一下!

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2021FRM備考資料大禮包

An investor has sold default protection on the most senior tranche of a CDO. If the default correlation decreases sharply, assuming everything else is unchanged, the investor’s position will

A. Gain significant value since the probability of exercising the protection falls.

B. Lose significant value since his protection will gain value.

C. Neither gain lose value since only excepted default looses matter and correlation does not affect expeaed deldull losses.

D.It depends on the pricing modd ubed and the market conditions

FRM網(wǎng)課

答案:A

解析:

2005年5月的案例里,策略為short the protection of equity tranch of CDO(賣出equity CDS,收保費spread)、long the protection of mezzanine tranch(買入mezzanine保險,付spread),由于equity tranch of CDO風險更大,故收的保費比付的保費多從而獲利,但zui終因為ρ降低而損失。【資料下載】GARP協(xié)會《2021年FRM學習目標》

當ρ接近于1時,equity和mezzanine可能同時違約或不違約,與mezzanine共進退,對equity來說,價值是上升的,而mezzanine價值下降。

當ρ下降時,equity的價值下降,風險上升,保費上升,而策略里收的保費是固定好的,故虧損;mezzanine價值上升,風險下降,保費下降,而策略里支付的保費是固定的,故虧損;在此題中,是賣出senior的保護,所以相反。