In a 32-bit program an address is a 32-bit value. In a 64-bit program an address is a 64-bit value (although only the low 48 bits are used). In a linear address space, the possible address space is 4GB. One note is that many hardware items are memory mapped to addresses.
However, this will not totally solve the Fedâs problem. Even when it was paying the banks 0.25% interest on reserves, the effective federal funds rate (the rate at which reserves at the Fed were actually being traded) was below 0.25%. This is why the Fed adopted a range for the federal funds rate of 0-0.25%.
The Fed has three primary tools: 1  The reserve requirement lets a bank lend up to 90% of its deposits. 2  The Fed funds rate sets a target for banks' prime interest rate. 3  The discount window is where banks can borrow funds overnight to make sure they have enough to meet the reserve requirement.