Explain why a single commercial bank can safely lend only an...

Explain why a single commercial bank can safely lend only an amount equal to its excess reserves but the commercial banking system as a whole can lend by a multiple of its excess reserves. What is the monetary multiplier, and how does it relate to the reserve ratio? $L O 4$

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Key Concepts

Money Multiplier

The money multiplier quantifies the potential expansion of the money supply as banks lend repeatedly within the fractional reserve system. It is defined as the reciprocal of the reserve ratio (i.e., 1 divided by the reserve ratio), indicating how initial excess reserves can lead to a multiple increase in total deposits through successive rounds of lending.

Reserve Ratio

The reserve ratio is the mandated fraction of deposits that banks must retain as reserves. It directly influences how much of the banks' total deposits can be used for lending, thereby impacting the overall capacity for credit expansion within the banking system.

Fractional Reserve Banking

This is the system in which banks are required to hold only a fraction of their deposits as reserves, allowing them to lend out the remaining portion. It underpins the process by which banks generate credit and expand the money supply, as they hold just enough to meet immediate withdrawal demands while lending excess funds.

Excess Reserves

Excess reserves are the funds that a bank holds beyond the minimum required reserves set by regulatory authorities. A single commercial bank can only lend out its excess reserves safely, ensuring it meets withdrawal demands without breaching statutory demands.

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