Funds deposited by commercial banks at Federal Reserve Banks. Designed to enable banks temporarily short of their reserve requirement to borrow reserves from banks having excess reserves.
Funds deposited to regional Federal Reserve Banks by commercial banks, including funds in excess of reserve requirements.
Noninterest-bearing deposits held in reserve for depository institutions at their district Federal Reserve Bank. Also, excess reserves lent by banks to each other.
Reserve balances maintained by Federal Reserve System member banks that are above the required amount to back up deposits. Also called fed funds.