债券等值收益率(Bond Equivalent Yield,BEY)
The bond equivalent yield or BEY for an investment is a calculated annual percentage yield for an investment, which may not pay out yearly. It is not to be confused with a bond's coupon rate. This allows investments which payout with different frequencies to be compared.
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为方便与债券的收益率直接比较,将货币市场金融产品如国库券的收益率转换为年收益率 (annual yield),这种收益率则称为债券等值收益率。短期国债的债券等值收益率,具体表述如下:
像美国的国库券因期限在一年以内,到期前不付息,价格因而以低于面值的贴现方式表达,如果不经转换计算,其收益水平便无法直接与较长期的公债相比较。
投资者可能支付9852元购买面额为10000为期91天的短期国债。到期时,投资者将收到10000元的款项,利息总额为148元。短期国债没有票面利率,则债券等值收益率为:
(148÷9852)×(365÷91)=6.025%