They were worried that if the discount rate is fifty basis points below the Federal Funds Rate then it's going to hit zero and that would be embarrassing; so they moved it.

他们担忧的是,如果贴现率比,联邦资金利率低五十个基本点,那么它将会接近零点,并且那将会很尴尬；所以他们改变了它。

耶鲁公开课 - 金融市场课程节选

What they did instead of just-remember the Federal Funds Rate is a target interest rate that the Fed attempts to hit through buying and selling treasury bills in the U.S. or in other countries buying and selling government bonds to affect the market.

他们真正做的事-记住,联邦资金利率是,美联储试图通过在美国,买进和卖出国库券,或在其他国家买进和卖出政府债券,来影响市场的目标利率。

耶鲁公开课 - 金融市场课程节选