蔡同学2021-05-03 15:10:52

习题集277题答案里面“ABS issues may use a margin step-up that increases the coupon structure after a call date”这句怎么理解呢？"the liability side of SPY has a lower cost than the asset side of the SPY to create an excess spread prior to administration costs"这句怎么理解呢？另外习题集289题答案“Gross salary with current employer, is an example of a characteristic, with the actual salary number itself representing an attribute”这句话怎么理解呢（D选项是An exemple of a characteristic in a scoring model is the applicant's current gross salary of 50,000，为何不对)？