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What is the primary reason for a central bank to increase the reserve requirement ratio of commercial banks?
To decrease the money supply in the economy
To increase the money supply in the economy
To decrease the profitability of commercial banks
To encourage banks to lend more
To decrease the money supply in the economy
Think of the RRR as a tax on lending capacity: higher reserve requirements mean banks have less money to lend, shrinking the credit multiplier effect and reducing overall liquidity in the system.
Central bank increases the Cash Reserve Ratio (CRR) or Reserve Requirement Ratio (RRR) for commercial banks.
MsтАЛ=RRR1тАЛ├ЧH
Think of the RRR as a tax on lending capacity: higher reserve requirements mean banks have less money to lend, shrinking the credit multiplier effect and reducing overall liquidity in the system.
Many students confuse reserve requirements with interest rates; while both reduce money supply, the Reserve Requirement directly limits the 'Money Multiplier' capacity of the banking system.
Define Money Multiplier
The money supply in an economy is governed by the money multiplier formula where RRR is the Reserve Requirement Ratio and H is the High-powered money.
MsтАЛ=RRR1тАЛ├ЧH
Analyze the change
If the Central Bank increases the RRR, the denominator of the multiplier RRR1тАЛ decreases. This restricts the amount of money banks can create through lending.
RRRтЖСтЯ╣RRR1тАЛтЖУтЯ╣MsтАЛтЖУ
Conclusion
A higher reserve requirement forces commercial banks to hold more cash in their vaults or with the central bank, effectively reducing the liquid funds available for loans, thereby shrinking the total money supply.
MsтАЛтЖУ
A is correct because increasing the reserve requirement ratio restricts the credit-creation capacity of commercial banks, leading to a contraction in the overall money supply.
This concept is central to 'Monetary Policy' in Economics; compare this with Open Market Operations (OMO), where selling bonds also reduces money supply.
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