If a bond has a7% nominal yield or coupon and was purchased at a premium of$ 103 ($ 1030), then your YTM will calculate lower because the7% interest is only paid to the$ 1000 par. 如果债券的名义收益率7%或优惠券,在103元(1030美元)的溢价购买,那么您油尖旺将计算出较低的,因为只有7%的利息支付给1000美元的面值。