23. 下面哪一類證券的問世最早？
(A)計畫性還本類組 (Planned Amortization Class)
(B)目標性還本類組 (Targeted Amortization Class)
(C)房貸轉付證券 (Mortgage Pass Through)
(D)純本金類組 (Principal Only)

答案：登入後查看
統計： A(48), B(63), C(372), D(76), E(0) #1811757