) Your bank plans to make a $20,000 loan to a customer which will have three annual installment payments. Your bank will charge 6% APR on the loan. What is the duration of this loan at the time of its origination?
To calculate duration of a loan we need to use the following formula:
Duration = present value of a cash flow * period / Loan amount
Loan amount is $ 20,000, annual rate of interest is 6 %. Since separate discounting factor is not given in question the rate is considered at 6%
Lets calculate present value of a cashflow * period as under:
period | cashflow | period * cashflow | present value @ 6% | Present value of cashflow |
1 | 1200 (i.e.$20,000 *6%) | 1200 (i.e. $ 1200*1) | 0.94 (i.e. 1/1.06) | 1128 (i.e. 1200 *0.94) |
2 | 1200 | 2400 (i.e. 1200*2) | 0.89 (i.e. 1/1.06*1.06) | 2136 (i.e. 1200* 0.89) |
3 | 1200 | 63600 | 0.84 | 53400 |
Total | 56,664 |
Duration = $56,664/$20000 = 2.83
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