先谢谢2楼,不过:
比如:假设没有shifting interest mechanism,开始时
senior80
subordinate20
如果有prepayment10,这$10是否给senior$8(80%),给subordinate$2(20%)--即按照面值权重分配?
书上的原话是:"the level of protection changes over time due to prepayment"(p410),如果按照上例,level of protection不会仅仅因为prepayment而改变。只有prepayment分给subordinate的大于20%,才对senior不利。
还句话说,我不明白prepayment是如何影响level of protection的?所有的principal payment(scheduled+prepayment)在没有shifting interest mechanism时时怎样分配的?
引入shifting interest mechanism,仅为解决"the level of protection changes over time due to prepayment"的问题,但如果按照面值权重分配,就不存在该问题。如果prepayment分给subordinate的大于20%,然后在用shifting interest mechanism解决,是否多此一举?
notes上有句更难理解的:"junior tranches are designed to provide loss protection for senior tanches by absorbing prepayment first"(p151),吸收prepayment能provide loss protection么?难道prepayment也是loss的一种?
[此贴子已经被作者于2009-4-17 17:37:12编辑过] |