注意到这题表格下方有句话,This spread implicily include a maturity premium in relation to the one year T notes as well as compensation forprepayment risk.是对10-year MBS prepayment risk spread的注释,意思是该项risk premium中包含了对于期限的补偿和对提前偿还风险的补偿,所以就这题而言,不需再加maturity premium的1%