r )# periods time value B u s i n e s s F i n a n c e

r )# periods time value B u s i n e s s F i n a n c e

Time Value of Money

1. Alex’s grandmother has $10,000 in a bank account that is not earning interest. Alex is 12 years old, and his grandmother has promised to give him this $10,000 to spend on college tuition – once he graduates from high school in six years. Alex understands the time value of money, so he wants to persuade his grandmother to put the money in an S&P index fund instead. Although no one can be sure what the rate of return will be, historically S&P funds have earned an average of 10% per year. Calculate the future value of the $10,000 (in six years) if the money was invested at a 10% annual return instead. Assume compounding is only once a year.

2.Sofia has a government bond that will be worth $500 when it matures in 5 years. She wants to sell it to her brother because she needs the cash now for car repairs. Assuming an interest rate of 3% and assuming monthly compounding, what is the present value of the bond?

3.Darius worked in a union motorcycle factory for 20 years before returning to school to become a paramedic instead. He is 45 now. He has a pension from his previous employer, which would pay him $1500/month after his retirement at 65. Assuming he will live to 80 (which is slightly higher than the life expectancy for an American man), he would earn $270,000 over 15 years. The company has stopped offering pensions and wants to buy out his pension today. Should Darius accept a buyout offer of $125,000? Assume that he could invest the money at an interest rate of 3% with monthly compounding. Name: Date: future value X x (1 + r)#periods Time Value of Money 2

4.Sam and Nadia just inherited $150,000 from Nadia’s grandmother. This is exactly the amount of principal remaining on their mortgage. They are wondering: Should they pay off the mortgage or keep making their monthly payments and invest the money in an S&P Index fund? They have a 30-year mortgage at 4% interest, and they have 16 years remaining to pay. They pay $1000/month in principal and interest payments. Assume they could earn about 6% annual interest on an investment, which would compound monthly.

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