22. 优先 / 次级 优先级 Senior class ( 优先级利益 Senior interest or Senior percentage = 92.25%) $92.25 mil 次级 Sub class $7.75 mil (subordinate interest or subordinate percentage = 7.75% $100 mil The sub class absorbs all losses up to $7.75 mil. Prepayment will reduce its protection for senior class, hence add-in structure uses shifting interest (see next page)
23.
24. 变动利益 Shifting Interest Question: why the shifting interest percentage reduces over time? Year of after issuance Shifting interest percentage 1-5 100 6 70 7 60 8 40 9 20 After 9 yeas 0
27. 抵押担保债券 (Collateralized Mortgage Obligations) MBS A B C D A A A B B B C C C D D D P+I I I I P+I I I I P+I P+I 顺序支付结构
28. 抵押担保债券 (Collateralized Mortgage Obligations) MBS A B C Z A Z B C C C P+I I -P I P+I I -P -P P+I P+I 顺序支付结构 + 零息部分 B A Z A B Z
29. 抵押担保债券 (Collateralized Mortgage Obligations) MBS A B C - F Z A Z B C P+I I -P I P+I I -P -P P+I P+I 顺序支付结构 + 零息部分+浮动+反向浮动 B A Z A B Z C - IF C - F C - IF C - F C - IF
30.
31.
32. 抵押担保债券 (Collateralized Mortgage Obligations) MBS PO IO P I 利息 (interest only) +本金 (principal only)