Question

Your wealthy uncle wants to donate money to you so that you can pursue your hobbies...

Your wealthy uncle wants to donate money to you so that you can pursue your hobbies without fulltime employment. If given a choice between the following four income streams, which would you prefer assuming an interest rate of 5% p.a.?

(a) $400,000 today

(b) $15,000 per year forever

(c) $30,000 each year for the next 20 years

(d) $600,000 in 10 years’ time

Attention tutor: please respond comprehensively addressing four income streams. Please use only formulas, without using excel. Please provide clear answers and detailed answers.

Homework Answers

Answer #1

Calculating present worth of each alternative to compare them

Alternative a). Present worth = $400000

Alternative b). present value of a forever annuity is Annual payment/interest rate

So, present worth = 15000/0.05 = $300000

Alternative c). Present value of an annuity that pay at the end of each year for next 20 years is

PV = PMT*(1 - (1+r)^(-t))/r = 30000*(1 - 1.05^-20)/0.05 = $373866.31

So, present worth = $373866.31

Alternative d). Present value of a future payment is calculated using formula

PV = FV/(1+r)^t = 600000/1.05^10 = $368347.95

Present worth = $368347.95

From the present values, we can see that present value of alternative a is maximum, so this should be opted.

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