以下是引用ptrell在2008-6-9 2:56:00的发言: Prepayment risk 从广义上来说是属于Interest rate risk的一种。对于MBS(Morgage backed securities)来说,Prepayment risk 是最重要的risk。从事房贷 证卷的Quant们,其构造定价模型的关键之一,除了interest rate 模型外,就是要建造一个prepayment risk,因为其直接影响房贷证卷的价格。
看到这里有考生居然说没听说过prepayment risk, 简直让人掉拖下巴。这样的人去面试fixed income部门的时候,会被立马扫地出门的,因为 prepayment risk在fixed income 部门中占重要地位的MBS系列产品中是常识。
I am not so sure. Isn't PO demostrating negative convexity when the yield is very low? Therefore, if the interest rate is down significantly, The value increase of PO should be slowing down. I didn't choose immediately for this reason, I selected the one saying "paying off but not immediately" I thought CFA is trying to trick us this subtle difference |