bull bond

例句：

1. 1. The company's bull bond issuance has been a major event in the financial market.
   该公司的牛债券发行是金融市场的一大事件。
2. 2.Investors are cautious about buying bull bonds due to concerns over inflation.
   由于对通胀的担忧，投资者对购买牛债券持谨慎态度。
3. 3. Bull bonds have been a popular investment option for retirees looking for income and stability.
   对于寻求收入和稳定性的退休人员来说，牛债券是一个受欢迎的投资选择。