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Zorluk: Çok zorCommercial Banks: Functions, Services, and Credit Creation

An investor makes a fresh cash deposit of N500,000\text{N}500,000 into a commercial bank. The Central Bank enforces a Cash Reserve Ratio (CRR) of 12.5%12.5\% and a mandatory Liquidity Ratio of 7.5%7.5\%. Assuming commercial banks hold no excess reserves and the public holds no cash leakages, what is the net total of derivative deposits created by the banking system?

  1. N2,000,000\text{N}2,000,000Cevap
  2. B
    N2,500,000\text{N}2,500,000
  3. C
    N3,500,000\text{N}3,500,000
  4. D
    N100,000\text{N}100,000

Cevap

The net total of derivative deposits created by the commercial banking system is N2,000,000\text{N}2,000,000.
Combining the cash reserve ratio (12.5%12.5\%) and liquidity ratio (7.5%7.5\%) gives an effective statutory reserve requirement of 20%20\% (0.200.20). The credit multiplier is 10.20=5\frac{1}{0.20} = 5. Total deposit expansion equals 5×N500,000=N2,500,0005 \times \text{N}500,000 = \text{N}2,500,000. Subtracting the original primary deposit of N500,000\text{N}500,000 yields net derivative credit created of N2,000,000\text{N}2,000,000.

Adım Adım Çözüm

1
Calculate total legal reserve requirement ratio
Total Reserve Ratio (r)=CRR+Liquidity Ratio=12.5%+7.5%=20%=0.20(r) = \text{CRR} + \text{Liquidity Ratio} = 12.5\% + 7.5\% = 20\% = 0.20
Commercial banks must satisfy both statutory reserve mandates before granting loans.
2
Calculate total deposit expansion
Total Expansion = Initial Depositr=N500,0000.20=N2,500,000\frac{\text{Initial Deposit}}{r} = \frac{\text{N}500,000}{0.20} = \text{N}2,500,000
Applying the bank credit multiplier formula 1r\frac{1}{r} yields maximum gross deposits.
3
Calculate net derivative deposits created
Derivative Deposits = Total Expansion - Initial Deposit = \text{N}2,500,000 - \text{N}500,000 = \text{N}2,000,000
Derivative deposits consist of newly created credit secondary to the initial primary cash injection.

Anahtar Kavram

Credit Creation and Total Reserve Multipliers
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