Allen deposits $100 into a fund today and $200 at the end of 30 years. Interest is credited at a quarterly nominal discount rate 6% for the first 10 years, at a semiannually nominal interest rate of 8% for the next 10 years, and at a force of interest of 10% thereafter. Calculate the accumulated value at the end of 40 years.
Value at Year 40 = FV of $ 100deposited today + FV of $ 200 deposited after 30 Years
FV = PV (1+r)^n
FV of $ 100deposited today :
Value after 10 Years = $ 100 ( 1 + 0.015)^40
= $ 100 ( 1.015^40)
= $ 100 * 1.8140
= $ 181.40
Value after 20 Years = $ 181.40 ( 1 + 0.04)^20
= $ 181.40 ( 1.04^20)
=$ 181.40 * 2.1911
= $ 397.47
Value at 40 Years:
Value after 20 Years =$ 397.47 ( 1 + 0.10)^20
= $ 397.47 ( 1.10^20)
=$ 397.47 * 6.7275
= $ 2673.98
FV of $ 200deposited after 30 Years :
Value after 40 Years =$ 200( 1 + 0.10)^10
= $ 200 ( 1.10^10)
=$ 200 * 2.5937
= $ 518.75
Amount after 40 Years:
= FV of $ 100deposited today + FV of $ 200 deposited after 30 Years
= $ 2673.98 + $ 518.75
= $ 3192.73
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