到期收益率(英语:yield to maturity,缩写为YTM)或作到期殖利率,是指投资者持有某一债券或其他定息证券至到期日,并假定其本金与利息都按时支付时,以买入价格计算的内部收益率。[1]按照到期收益率对债券未来所有的现金流量(包括利息和本金)进行折现,所得到的现值与买入价格相等,即满足以下等式:
当债券的息票率大于到期收益率时,该债券称为溢价债券(premium bond),反之则称为折价债券(discount bond)。而当息票率与到期收益率相等时,则称为平价债券(par bond)。
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