Sophia_Li
2017-05-19 03:25請教老師一道官網(wǎng)上的習(xí)題: Statement 1: The effective convexity of a putable bond cannot be less than that of an otherwise identical option-free bond. Statement 2: The effective convexity of a callable bond can be negative in some circumstances, but the effective convexity of a putable bond is always positive. Statement 3: The effective duration of a callable bond cannot be greater than that of an otherwise identical option-free bond and the effective duration of a putable bond cannot be less than that of the option-free bond 答案是只有2是對的,但1和3哪里錯呢?
所屬: 視頻位置 相關(guān)試題
來源: 視頻位置 相關(guān)試題
1個回答
大鬼班主任
2017-05-19 10:53
該回答已被題主采納
同學(xué)你好,
Statement 1和3講的其實(shí)是同一件事情。我畫了一張圖,可以參考下,橫坐標(biāo)表示利率,縱坐標(biāo)表示value。
首先convexity衡量的是duration變化的敏感度。利率上升的時候,putable價格的變化速率更快,所以convexity更高。
但是,隨著利率上升,putable bond的duration會先于option-free bond趨于平緩,因為他有一個地價,反觀option-free bond,這個時候它的變化速率就會比putable bond 要快,于是convexity也要高。
所以statement 1說永遠(yuǎn)不可能小于 option-free是錯誤的,如果改成duration 永遠(yuǎn)不可能大于option-free就正確了。
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回復(fù)大鬼:非常詳細(xì),O(∩_∩)O謝謝
