A pension plan is obligated to make disbursements of $1 million, 2 million and 1 million every six months during the next 1.5 years. What is the duration if the market interest rate is 10%?
Given about a pension plan
disbursements of $1 million, 2 million and 1 million every six months during the next 1.5 years
Cash flow in 0.5 year = $1 million
Cash flow in 1 year = $2 million
Cash flow in 1.5 year = $1 million
Market interest rate r = 10%
Duration is calculated as below table:
PV of Cash flow = cash flow/(1 + r/2)^period
Total PV = sum of all PV = $3630277.51
weight = PV of cash flow/Total PV
duration of each Cash flow = year*weight
duration of the pension fund = sum of all duration = 0.99 years
Year | Period | Cash flow | PV of Cash flow=cash flow/(1+r)^period | weight = PV of coupon/Total PV | Duration = weight*year |
0.5 | 1 | $ 10,00,000.00 | $ 9,52,380.95 | 0.2623 | 0.1312 |
1 | 2 | $ 20,00,000.00 | $ 18,14,058.96 | 0.4997 | 0.4997 |
1.5 | 3 | $ 10,00,000.00 | $ 8,63,837.60 | 0.2380 | 0.3569 |
Total PV | $ 36,30,277.51 | Duration | 0.99 |
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