loveshihongyu
2020-03-16 12:49老師您好, 您能幫我再解釋一下這句話(huà)嗎?為什么OMS 沒(méi)有考慮到credit spread volatility呢?謝謝!
所屬:CFA Level III > Fixed-Income Portfolio Management 視頻位置 相關(guān)試題
來(lái)源: 視頻位置 相關(guān)試題
1個(gè)回答
Chris Lan助教
2020-03-16 14:09
該回答已被題主采納
同學(xué)你好
原版書(shū)有個(gè)例子,意思是兩個(gè)組合有相同的平均OAS,但sensitive可能是不同的。
Average OAS is a reasonable representation of portfolio credit quality, but it does not fully account for the risk of credit spread volatility. For example, a portfolio composed of 30-year corporate bonds with an average OAS of 100 will be more sensitive to changes in credit spreads compared with a portfolio of two-year bonds having the same average OAS. A weighted-average spread duration can account for the risk of credit spread volatility.
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追問(wèn)
不好意思, 老師。 我還是不太懂, 能不能用白話(huà)再講解一下嗎?
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追答
同學(xué)你好
原版書(shū)這段話(huà),說(shuō)的是does not fully account for the risk of credit spread volatility
不是完全不能衡量,而是衡量的不全。
書(shū)上舉了一個(gè)例子說(shuō),有兩個(gè)組合它們的average OAS都是100,但是他們對(duì)于信用利差風(fēng)險(xiǎn)的敏感程度可能是不同的,也就是信用利差變化,對(duì)這兩個(gè)average OAS都是100的組合的影響程度可能是不同的,所以當(dāng)credit spread volitility時(shí),不能很好的衡量這種風(fēng)險(xiǎn)。
