Reserve Requirements [RRR]

Reserve requirements are regulations that set the minimum amount of reserves banks must hold against customer deposits, serving as a monetary policy tool and ensuring banking system liquidity. For example, with a 10% requirement, a bank with $1 billion in deposits must hold $100 million in reserves (cash in vaults or deposits at the central bank). Higher requirements reduce money available for lending, tightening monetary conditions. The Federal Reserve eliminated reserve requirements in March 2020 to support lending during COVID-19, joining Canada, UK, and others with zero requirements. China actively uses reserve requirements, adjusting them frequently between 5-20% to manage liquidity. Requirements can vary by institution size and deposit type. While historically important for monetary control, modern central banks increasingly rely on interest rates rather than reserve requirements. Banks still hold reserves for operational needs and regulatory liquidity requirements like the Liquidity Coverage Ratio (LCR). The money multiplier effect means small changes in requirements can significantly impact credit creation.