The reserve requirement now is 10% 10% on demand deposits so they're forced to keep those reserves and much of that is in the form of deposits at the Federal Reserve Banks.

现在的法定准备金率%,在活期存款上是,所以它们被强迫持有这些准备金,并且一大部分是在联邦储备银行,存着的。

耶鲁公开课 - 金融市场课程节选