With an official interest rate of 0.1%-which the bank left unchanged at its meeting on friday-it has little scope to do much more through conventional means.

日行在周五的会议中表示将保持0.1%的官方利率不变，然而这些传统的方式已经很难发挥更大的作用了。

youdao

That's another conventional formula that goes from interest rate to price of the security.

这是另一条已知利率,求证券价格的经验公式

耶鲁公开课 - 金融市场课程节选

In December, it exhausted its supply of conventional monetary ammunition when it lowered its short term-interest rate to between zero and 0.25%.

ECONOMIST: The Fed