英文名称：Perpetual Note

中文名称：永久票据

指不设定最终期限，发行人只需持续支付利息，永不还本的一类具有股票特性的票据。

e.g. The offerings sold yesterday include a $1.5 billion of bonds from Marathon Oil Corp. and a $1.25 billion offering of perpetual notes from Barclays PLC.