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CHAPTER 3
THE TIME VALUE OF MONEY
OVERVIEW
A dollar in the hand today is worth more than a dollar to be received in the future because, if you had it now, you could invest that dollar and earn interest. Of all the techniques used in finance, none is more important than the concept of the time value of money, or discounted cash flow (DCF) analysis. The principles of time value analysis that are developed in this chapter have many applications, ranging from setting up schedules for paying off loans to decisions about whether to acquire new equipment.
Future value and present value techniques can be applied to a single cash flow (lump sum), ordinary annuities, annuities due, and uneven cash flow streams. Future and present values can be calculated using a regular calculator or a calculator with financial functions. When compounding occurs more frequently than once a year, the effective rate of interest is greater than the quoted rate.
OUTLINE
The cash flow time line is one of the most important tools in time value of money analysis. Cash flow time lines help to visualize what is happening in a particular problem. Cash flows are placed directly below the tick marks, and interest rates are shown directly above the time line; unknown cash flows are indicated by question marks. Thus, to find the future value of $100 after 5 years at 5 percent interest, the following cash flow time line can be set up:
Time: 0 1 2 3 4 5
     
Cash flows: 100 FV5 = ?
A cash outflow is a payment, or disbursement, of cash for expenses, investments, and so on.
A cash inflow is a receipt of cash from an investment, an employer, or other sources.
Compounding is the process of determining the value of a cash flow or series of cash flows some time in the future when compound interest is applied. The future value is the amount to which a cash flow or series of cash flows will grow over a given period of time when compounded at a given interest rate. The future value can be calculated as
FVn = PV(1 + k)n,
where PV = present value, or beginning amount; k = interest rate per period; and n = number of periods involved in the analysis. This equation can be solved in one of two ways: numerically or with a financial calculator. For calculations, assume the following data that were presented in the time line above: present value (PV) = $100, interest rate (k) = 5%, and number of years (n) = 5.
Compounded interest is interest earned on interest.
To solve numerically, use a regular calculator to find 1 + k = 1.05 raised to the fifth power, which equals 1.2763. Multiply this figure by PV = $100 to get the final answer of FV5 = $127.63.
With a financial calculator, the future value can be found by using the time value of money input keys, where N = number of periods, I = interest rate per period, PV = present value, PMT = annuity payment, and FV = future value. By entering N = 5, I = 5, PV = 100, and PMT = 0, and then pressing the FV key, the answer 127.63 is displayed.
Some financial calculators require that all cash flows be designated as either inflows or outflows, thus an outflow must be entered as a negative number (for example, PV = 100 instead of PV = 100).
Some calculators require you to press a Compute key before pressing the FV key.
A graph of the compounding process shows how any sum grows over time at various interest rates. The greater the rate of interest, the faster is the rate of growth.
The interest rate is, in fact, a growth rate.
The time value concepts can be applied to anything that is growing.
Finding the present value of a cash flow or series of cash flows is called discounting, and it is simply the reverse of compounding. In general, the present value is the value today of a future cash flow or series of cash flows. By solving for PV in the future value equation, the present value, or discounting, equation can be developed and written in several forms:
PV = EMBED Equation.3 .
To solve for the present value of $127.63 discounted back 5 years at a 5% opportunity cost rate, one can utilize either of the two solution methods:
Numerical solution: Divide $127.63 by 1.05 five times to get PV = $100.
Financial calculator solution: Enter N = 5, I = 5, PMT = 0, and FV = 127.63, and then press the PV key to get PV = 100.
The opportunity cost rate is the rate of return on the best available alternative investment of equal risk.
A graph of the discounting process shows how the present value of any sum to be received in the future diminishes and approaches zero as the payment date is extended farther into the future. At relatively high interest rates, funds due in the future are worth very little today, and even at a relatively low discount rate, the present value of a sum due in the very distant future is quite small.
The compounding and discounting processes are reciprocals, or inverses, of one another. In addition, there are four variables in the time value of money equations: PV, FV, k, and n. If three of the four variables are known, you can find the value of the fourth.
If we are given PV, FV, and n, we can determine k by substituting the known values into either the present value or future value equations, and then solving for k. Thus, if you can buy a security at a price of $78.35 which will pay you $100 after 5 years, what is the interest rate earned on the investment?
Numerical solution: Use a trial and error process to reach the 5% value for k. This is a tedious and inefficient process. Alternatively, you could use algebra to solve the time value equation.
Financial calculator solution: Enter N = 5, PV = 78.35, PMT = 0, and FV = 100, then press the I key, and I = 5 is displayed.
Likewise, if we are given PV, FV, and k, we can determine n by substituting the known values into either the present value or future value equations, and then solving for n. Thus, if you can buy a security with a 5 percent interest rate at a price of $78.35 today, how long will it take for your investment to return $100?
Numerical solution: Use a trial and error process to reach the value of 5 for n. This is a tedious and inefficient process. The equation can also be solved algebraically.
Financial calculator solution: Enter I = 5, PV = 78.35, PMT = 0, and FV = 100, then press the N key, and N = 5 is displayed.
An annuity is a series of equal payments made at fixed intervals for a specified number of periods. If the payments occur at the end of each period, as they typically do, the annuity is an ordinary, or deferred, annuity. If the payments occur at the beginning of each period, it is called an annuity due.
The future value of an ordinary annuity, FVAn, is the total amount one would have at the end of the annuity period if each payment were invested at a given interest rate and held to the end of the annuity period.
Defining FVAn as the future value of an ordinary annuity of n years, and PMT as the periodic payment, we can write
FVAn = PMT EMBED Equation.3 = PMT EMBED Equation.3 = PMT EMBED Equation.3 .
Using a financial calculator, enter N = 3, I = 5, PV = 0, and PMT = 100. Then press the FV key, and 315.25 is displayed.
For an annuity due, each payment is compounded for one additional period, so the future value of the entire annuity is equal to the future value of an ordinary annuity compounded for one additional period. Thus:
FVA (DUE)n = PMT EMBED Equation.3 .
Most financial calculators have a switch, or key, marked DUE or BEG that permits you to switch from endofperiod payments (an ordinary annuity) to beginningofperiod payments (an annuity due). Switch your calculator to BEG mode, and calculate as you would for an ordinary annuity. Do not forget to switch your calculator back to END mode when you are finished.
The present value of an ordinary annuity, PVAn, is the single (lump sum) payment today that would be equivalent to the annuity payments spread over the annuity period. It is the amount today that would permit withdrawals of an equal amount (PMT) at the end (or beginning for an annuity due) of each period for n periods.
Defining PVAn as the present value of an ordinary annuity of n years and PMT as the periodic payment, we can write
PVAn = PMT EMBED Equation.3 = PMT EMBED Equation.3 = PMT EMBED Equation.3 .
Using a financial calculator, enter N = 3, I = 5, PMT = 100, and FV = 0, and then press the PV key, for an answer of $272.32.
One especially important application of the annuity concept relates to loans with constant payments, such as mortgages and auto loans. With these amortized loans the amount borrowed is the present value of an ordinary annuity, and the payments constitute the annuity stream.
The present value for an annuity due is
PVA (DUE)n = PMT EMBED Equation.3 .
Using a financial calculator, switch to the BEG mode, and then enter N = 3, I = 5, PMT = 100, and FV = 0, and then press PV to get the answer, $285.94. Again, do not forget to switch your calculator back to END mode when you are finished.
You can solve for the interest rate (rate of return) earned on an annuity.
To solve numerically, you must use the trialanderror process and plug in different values for k in the annuity equation to solve for the interest rate.
You can use the financial calculator by entering the appropriate values for N, PMT, and either FV or PV, and then pressing I to solve for the interest rate.
You can solve for the number of periods (N) in an annuity.
To solve numerically, you must use the trialanderror process and plug in different values for N in the annuity equation to solve for the number of periods.
You can use the financial calculator by entering the appropriate values for I, PMT, and either FV or PV, and then pressing N to solve for the number of periods.
A perpetuity is a stream of equal payments expected to continue forever.
The present value of a perpetuity is:
PVP = EMBED Equation.3 .
For example, if the interest rate were 12 percent, a perpetuity of $1,000 a year would have a present value of $1,000/0.12 = $8,333.33.
A consol is a perpetual bond issued by the British government to consolidate past debts; in general, any perpetual bond.
The value of a perpetuity changes dramatically when interest rates change.
Many financial decisions require the analysis of uneven, or nonconstant, cash flows rather than a stream of fixed payments such as an annuity. An uneven cash flow stream is a series of cash flows in which the amount varies from one period to the next.
The term payment, PMT, designates constant cash flows, while the term CF designates cash flows in general, including uneven cash flows.
The present value of an uneven cash flow stream is the sum of the PVs of the individual cash flows of the stream.
The PV is found by applying the following general present value equation:
PV = EMBED Equation.3 .
With a financial calculator, enter each cash flow (beginning with the t = 0 cash flow) into the cash flow register, CFj, enter the appropriate interest rate, and then press the NPV key to obtain the PV of the cash flow stream.
Be sure to clear the cash flow register before starting a new problem.
Similarly, the future value of an uneven cash flow stream, or terminal value, is the sum of the FVs of the individual cash flows of the stream.
The FV can be found by applying the following general future value equation:
FVn = EMBED Equation.3 .
Some calculators have a net future value (NFV) key which allows you to obtain the FV of an uneven cash flow stream.
We generally are more interested in the present value of an assets cash flow stream than in the future value because the present value represents todays value, which we can compare with the price of the asset.
Once we know its present value, we can find the future value of an uneven cash flow stream by treating the present value as a lump sum amount and compounding it to the future period.
If one knows the relevant cash flows, the effective interest rate can be calculated efficiently with a financial calculator. Enter each cash flow (beginning with the t = 0 cash flow) into the cash flow register, CFj, and then press the IRR key to obtain the interest rate of an uneven cash flow stream.
IRR stands for internal rate of return, which is the return on an investment.
Annual compounding is the arithmetic process of determining the final value of a cash flow or series of cash flows when interest is added once a year. Semiannual, quarterly, and other compounding periods more frequent than on an annual basis are often used in financial transactions. Compounding on a nonannual basis requires an adjustment to both the compounding and discounting procedures discussed previously. Moreover, when comparing securities with different compounding periods, they need to be put on a common basis. This requires distinguishing between the simple, or quoted, interest rate and the effective annual rate.
The simple, or quoted, interest rate is the contracted, or quoted, interest rate that is used to calculate the interest paid per period.
The periodic rate is the interest rate charged per period.
Periodic rate = Stated annual interest rate/Number of periods per year.
The annual percentage rate, APR, is the periodic rate times the number of periods per year.
The effective annual rate, EAR, is the rate that would have produced the final compounded value under annual compounding. The effective annual rate is given by the following formula:
Effective annual rate (EAR) = EMBED Equation.3
where kSIMPLE is the simple, or quoted, interest rate (that is, the APR), and m is the number of compounding periods (interest payments) per year. The EAR is useful in comparing securities with different compounding periods.
For example, to find the effective annual rate if the simple rate is 6 percent and semiannual compounding is used, we have:
EAR = (1 + 0.06/2)2 1.0 = 6.09%.
For annual compounding use the formula to find the future value of a single payment (lump sum):
FVn = PV(1 + k)n.
When compounding occurs more frequently than once a year, use this formula:
FVn = PV EMBED Equation.3 .
Here m is the number of times per year compounding occurs, and n is the number of years.
The amount to which $1,000 will grow after 5 years if quarterly compounding is applied to a nominal 8 percent interest rate is found as follows:
FVn = $1,000(1 + 0.08/4)(4)(5) = $1,000(1.02)20 = $1,485.95.
Financial calculator solution: Enter N = 20, I = 2, PV = 1000, and PMT = 0, and then press the FV key to find FV = $1,485.95.
The present value of a 5year future investment equal to $1,485.95, with an 8 percent nominal interest rate, compounded quarterly, is found as follows:
EMBED Equation.3
Financial calculator solution: Enter N = 20, I = 2, PMT = 0, and FV = 1485.95, and then press the PV key to find PV = $1,000.00.
In general, nonannual compounding can be handled one of two ways.
State everything on a periodic rather than on an annual basis. Thus, n = 6 periods rather than n = 3 years and k = 3% instead of k = 6% with semiannual compounding.
Find the effective annual rate (EAR) with the equation below and then use the EAR as the rate over the given number of years.
EAR = EMBED Equation.3
An important application of compound interest involves amortized loans, which are paid off in equal installments over the life of the loan.
The amount of each payment, PMT, is found using a financial calculator by entering N (number of years), I (interest rate), PV (amount borrowed), and FV = 0, and then pressing the PMT key to find the periodic payment.
Each payment consists partly of interest and partly of repayment of the amount borrowed (principal). This breakdown is often developed in a loan amortization schedule.
The interest component is largest in the first period, and it declines over the life of the loan as the outstanding balance of the loan decreases.
The repayment of principal is smallest in the first period, and it increases thereafter.
The text discussion has involved three different interest rates. It is important to understand their differences.
The simple, or quoted, rate, kSIMPLE, is the interest rate quoted by borrowers and lenders. This quotation must include the number of compounding periods per year.
This rate is never shown on a time line, and it is never used as an input in a financial calculator unless compounding occurs only once a year.
kSIMPLE = Periodic rate ( m = Annual percentage rate = APR.
The periodic rate, kPER, is the rate charged by a lender or paid by a borrower each interest period. Periodic rate = kPER = kSIMPLE/m.
The periodic rate is used for calculations in problems where two conditions hold: (1) payments occur on a regular basis more frequently than once a year, and (2) a payment is made on each compounding (or discounting) date.
The APR, or annual percentage rate, represents the periodic rate stated on an annual basis without considering interest compounding. The APR never is used in actual calculations; it is simply reported to borrowers.
The effective annual rate, EAR, is the rate with which, under annual compounding, we would obtain the same result as if we had used a given periodic rate with m compounding periods per year.
EAR is found as follows:
EAR = EMBED Equation.3
In Appendix 3A we discuss using spreadsheets to solve time value of money problems.
In Appendix 3B we discuss using interest tables to solve time value of money problems.
In Appendix 3C we discuss how to generate a loan amortization schedule using a financial calculator.
SELFTEST QUESTIONS
Definitional
1. A(n) ______ _________ is a payment, or disbursement, of cash for expenses, investments, and so on.
2. A(n) ______ ________ is a receipt of cash from an investment, an employer, or other sources.
3. _____________ is the process of determining the value of a cash flow or series of cash flows some time in the future.
4. The ________ _______ is the amount to which a cash flow or series of cash flows will grow over a given period of time when compounded at a given interest rate.
5. The beginning value of an account or investment in a project is known as its _________ _______.
6. Using a savings account as an example, the difference between the accounts present value and its future value at the end of the period is due to __________ earned during the period.
7. The expression PV(1 + k)n determines the ________ _______ of a sum at the end of ___ periods.
8. Finding the present value of a cash flow or series of cash flows is often referred to as _____________, and it is simply the reverse of the _____________ process.
9. The _____________ ______ ______ is the rate of return on the best alternative investment of equal risk.
10. A series of equal payments at fixed intervals for a specified number of periods is a(n) _________. If the payments occur at the end of each period it is a(n) __________ annuity, while if the payments occur at the beginning of each period it is an annuity _____.
11. A(n) ____________ is a stream of equal payments expected to continue forever.
12. The term PMT designates __________ cash flows, while the term CF designates cash flows in general, including ________ cash flows.
13. The present value of an uneven cash flow stream is the _____ of the PVs of the individual cash flows of the stream.
14. Since different types of investments use different compounding periods, it is important to distinguish between the quoted, or ________, interest rate and the ___________ annual interest rate, the rate that would have produced the final compound value under annual compounding.
15. ____________ time periods are used when payments occur within periods, instead of at either the beginning or the end of periods.
16. ___________ loans are paid off in equal installments over their lifetime and are an important application of compound interest.
17. The __________ rate is equal to the simple interest rate divided by the number of compounding periods per year.
Conceptual
18. If a bank uses quarterly compounding for savings accounts, the simple interest rate will be greater than the effective annual rate (EAR).
a. True b. False
19. If money has time value (that is, k > 0), the future value of some amount of money will always be more than the amount invested. The present value of some amount to be received in the future is always less than the amount to be received.
a. True b. False
20. You have determined the profitability of a planned project by finding the present value of all the cash flows from that project. Which of the following would cause the project to look less appealing, that is, have a lower present value?
a. The discount rate decreases.
b. The cash flows are received in later years (further into the future).
c. The discount rate increases.
d. Statements b and c are correct.
e. Statements a and b are correct.
21. As the discount rate increases without limit, the present value of a future cash inflow
a. Gets larger without limit.
b. Stays unchanged.
c. Approaches zero.
d. Gets smaller without limit; that is, approaches minus infinity.
e. Goes to ek ( n.
22. Which of the following statements is correct?
a. Except in situations where compounding occurs annually, the periodic interest rate exceeds the simple interest rate.
b. The effective annual rate always exceeds the simple interest rate, no matter how few or many compounding periods occur each year.
c. If compounding occurs more frequently than once a year, and if payments are made at times other than at the end of compounding periods, it is impossible to determine present or future values, even with a financial calculator. The reason is that under these conditions, the basic assumptions of discounted cash flow analysis are not met.
d. Assume that compounding occurs quarterly, that the simple interest rate is 8 percent, and that you need to find the present value of $1,000 due 10 months from today. You could get the correct answer by discounting the $1,000 at 8.2432 percent for 10/12ths of a year.
e. Statements a, b, c, and d are all false.
SELFTEST PROBLEMS
(Note: In working these problems, you may get an answer which differs from ours by a few cents due to differences in rounding. This should not concern you; just choose the closest answer.)
1. Assume that you purchase a 6year, 8 percent savings certificate for $1,000. If interest is compounded annually, what will be the value of the certificate when it matures?
a. $630.17 b. $1,469.33 c. $1,677.10 d. $1,586.87 e. $1,766.33
2. A savings certificate similar to the one in the previous problem is available with the exception that interest is compounded semiannually. What is the difference between the ending value of the savings certificate compounded semiannually and the one compounded annually?
a. The semiannual certificate is worth $14.16 more than the annual certificate.
b. The semiannual certificate is worth $14.16 less than the annual certificate.
c. The semiannual certificate is worth $21.54 more than the annual certificate.
d. The semiannual certificate is worth $21.54 less than the annual certificate.
e. The semiannual certificate is worth the same as the annual certificate.
3. A friend promises to pay you $600 two years from now if you loan him $500 today. What annual interest rate is your friend offering?
a. 7.55% b. 8.50% c. 9.54% d. 10.75% e. 11.25%
4. At an inflation rate of 9 percent, the purchasing power of $1 would be cut in half in just over 8 years (some calculators round to 9 years). How long, to the nearest year, would it take for the purchasing power of $1 to be cut in half if the inflation rate were only 4 percent?
a. 12 years b. 15 years c. 18 years d. 20 years e. 23 years
5. You are offered an investment opportunity with the guarantee that your investment will double in 5 years. Assuming annual compounding, what annual rate of return would this investment provide?
a. 40.00% b. 100.00% c. 14.87% d. 20.00% e. 18.74%
6. You decide to begin saving toward the purchase of a new car in 5 years. If you put $1,000 at the end of each of the next 5 years in a savings account paying 6 percent compounded annually, how much will you accumulate after 5 years?
a. $6,691.13 b. $5,637.09 c. $1,338.23 d. $5,975.32 e. $5,731.94
7. Refer to SelfTest Problem 6. What would be the ending amount if the payments were made at the beginning of each year?
a. $6,691.13 b. $5,637.09 c. $1,338.23 d. $5,975.32 e. $5,731.94
8. Refer to SelfTest Problem 6. What would be the ending amount if $500 payments were made at the end of each 6month period for 5 years and the account paid 6 percent compounded semiannually?
a. $6,691.13 b. $5,637.09 c. $1,338.23 d. $5,975.32 e. $5,731.94
9. Calculate the present value of $1,000 to be received at the end of 8 years. Assume an interest rate of 7 percent.
a. $582.01 b. $1,718.19 c. $531.82 d. $5,971.30 e. $649.37
10. Jane Smith has $20,000 in a brokerage account, and she plans to contribute an additional $7,500 to the account at the end of every year. The brokerage account has an expected annual return of 8 percent. If Janes goal is to accumulate $375,000 in the account, how many years will it take for Jane to reach her goal?
a. 5.20 b. 10.00 c. 12.50 d. 16.33 e. 18.40
11. How much would you be willing to pay today for an investment that would return $800 each year at the end of each of the next 6 years? Assume a discount rate of 5 percent.
a. $5,441.53 b. $4,800.00 c. $3,369.89 d. $4,060.55 e. $4,632.37
12. You have applied for a mortgage of $60,000 to finance the purchase of a new home. The bank will require you to make annual payments of $7,047.55 at the end of each of the next 20 years. Determine the interest rate in effect on this mortgage.
a. 8.0% b. 9.8% c. 10.0% d. 5.1% e. 11.2%
13. If you would like to accumulate $7,500 over the next 5 years, how much must you deposit each six months, starting six months from now, given a 6 percent interest rate and semiannual compounding?
a. $1,330.47 b. $879.23 c. $654.23 d. $569.00 e. $732.67
14. A company is offering bonds that pay $100 per year indefinitely. If you require a 12 percent return on these bonds (that is, the discount rate is 12 percent), what is the value of each bond?
a. $1,000.00 b. $962.00 c. $904.67 d. $866.67 e. $833.33
15. What is the present value (t = 0) of the following cash flows if the discount rate is 12 percent?
0 1 2 3 4 5
     
0 2,000 2,000 2,000 3,000 4,000
a. $4,782.43 b. $4,440.51 c. $4,221.79 d. $4,041.23 e. $3,997.98
16. What is the effective annual percentage rate (EAR) of 12 percent compounded monthly?
a. 12.00% b. 12.55% c. 12.68% d. 12.75% e. 13.00%
17. Martha Mills, manager of Plaza Gold Emporium, wants to sell on credit, giving customers 3 months in which to pay. However, Martha will have to borrow from her bank to carry the accounts receivable. The bank will charge a simple 16 percent, but with monthly compounding. Martha wants to quote a simple interest rate to her customers (all of whom are expected to pay on time at the end of 3 months) which will exactly cover her financing costs. What simple annual rate should she quote to her credit customers?
a. 15.44% b. 19.56% c. 17.23% d. 16.21% e. 18.41%
18. SelfTest Problem 12 refers to a 20year mortgage of $60,000. This is an amortized loan. How much principal will be repaid in the second year?
a. $1,152.30 b. $1,725.70 c. $5,895.25 d. $7,047.55 e. $1,047.55
19. You have $1,000 invested in an account that pays 16 percent compounded annually. A commission agent (called a finder) can locate for you an equally safe deposit that will pay 16 percent, compounded quarterly, for 2 years. What is the maximum amount you should be willing to pay him now as a fee for locating the new account?
a. $10.92 b. $13.78 c. $16.14 d. $16.78 e. $21.13
20. The present value (t = 0) of the following cash flow stream is $11,958.20 when discounted at 12 percent annually. What is the value of the missing t = 2 cash flow?
0 1 2 3 4
    
PV = 11,958.20 2,000 ? 4,000 4,000
a. $4,000.00 b. $4,500.00 c. $5,000.00 d. $5,500.00 e. $6,000.00
21. Today is your birthday, and you decide to start saving for your college education. You will begin college on your 18th birthday and will need $4,000 per year at the end of each of the following 4 years. You will make a deposit one year from today in an account paying 12 percent annually and continue to make an identical deposit each year up to and including the year you begin college. If a deposit amount of $2,542.05 will allow you to reach your goal, what birthday are you celebrating today?
a. 13 b. 14 c. 15 d. 16 e. 17
22. Assume that your aunt sold her house on December 31 and that she took a mortgage in the amount of $10,000 as part of the payment. The mortgage has a simple interest rate of 10 percent, but it calls for payments every 6 months, beginning on June 30, and the mortgage is to be amortized over 10 years. Now, one year later, your aunt must file Schedule B of her tax return with the IRS informing them of the interest that was included in the two payments made during the year. (This interest will be income to your aunt and a deduction to the buyer of the house.) What is the total amount of interest that was paid during the first year?
a. $1,604.86 b. $619.98 c. $984.88 d. $1,205.76 e. $750.02
23. Assume that you inherited some money. A friend of yours is working as an unpaid intern at a local brokerage firm, and her boss is selling some securities that call for four payments, $50 at the end of each of the next 3 years, plus a payment of $1,050 at the end of Year 4. Your friend says she can get you some of these securities at a cost of $900 each. Your money is now invested in a bank that pays an 8 percent simple interest rate, but with quarterly compounding. You regard the securities as being just as safe, and as liquid, as your bank deposit, so your required effective annual rate of return on the securities is the same as that on your bank deposit. You must calculate the value of the securities to decide whether they are a good investment. What is their present value to you?
a. $957.75 b. $888.66 c. $923.44 d. $1,015.25 e. $893.26
24. Your company is planning to borrow $1,000,000 on a 5year, 15 percent, annual payment, fully amortized term loan. What fraction of the payment made at the end of the second year will represent repayment of principal?
a. 57.18% b. 42.82% c. 50.28% d. 49.72% e. 60.27%
25. Your firm can borrow from its bank for one month. The loan will have to be rolled over at the end of the month, but you are sure the rollover will be allowed. The simple interest rate is 14 percent, but interest will have to be paid at the end of each month, so the bank interest rate is 14 percent, monthly compounding. Alternatively, your firm can borrow from an insurance company at a simple interest rate that would involve quarterly compounding. What simple quarterly rate would be equivalent to the rate charged by the bank?
a. 12.44% b. 14.16% c. 13.55% d. 13.12% e. 12.88%
26. Assume that you have $15,000 in a bank account that pays 5 percent annual interest. You plan to go back to school for a combination MBA/law degree 5 years from today. It will take you an additional 5 years to complete your graduate studies. You figure you will need a fixed income of $25,000 in todays dollars; that is, you will need $25,000 of todays dollars during your first year and each subsequent year. (Thus, your real income will decline while you are in school.) You will withdraw funds for your annual expenses at the beginning of each year. Inflation is expected to occur at the rate of 3 percent per year. How much must you save during each of the next 5 years in order to achieve your goal? The first increment of savings will be deposited one year from today.
a. $20,241.66 b. $19,224.55 c. $18,792.11 d. $19,559.42 e. $20,378.82
27. You plan to buy a new HDTV. The dealer offers to sell the set to you on credit. You will have 3 months in which to pay, but the dealer says you will be charged a 15 percent interest rate; that is, the simple interest rate is 15 percent, quarterly compounding. As an alternative to buying on credit, you can borrow the funds from your bank, but the bank will make you pay interest each month. At what simple bank interest rate should you be indifferent between the two types of credit?
a. 13.7643% b. 14.2107% c. 14.8163% d. 15.5397% e. 15.3984%
28. Assume that your father is now 50 years old, that he plans to retire in 10 years, and that he expects to live for 25 years after he retires, that is, until he is 85. He wants a fixed retirement income that has the same purchasing power at the time he retires as $60,000 has today (he realizes that the real value of his retirement income will decline yearbyyear after he retires). His retirement income will begin the day he retires, 10 years from today, and he will then get 24 additional annual payments. Inflation is expected to be 5 percent per year from today forward; he currently has $150,000 saved; and he expects to earn a return on his savings of 7 percent per year, annual compounding. To the nearest dollar, how much must he save during each of the next 10 years (with deposits being made at the end of each year) to meet his retirement goal?
a. $66,847.95 b. $77,201.21 c. $54,332.88 d. $41,987.33 e. $62,191.25
29. A rookie quarterback is in the process of negotiating his first contract. The teams general manager has offered him three possible contracts. Each of the contracts lasts for four years. All of the money is guaranteed and is paid at the end of each year. The payment terms of the contracts are listed below:
Year Contract 1 Contract 2 Contract 3
1 $1.5 million $1.0 million $3.5 million
2 1.5 million 1.5 million 0.5 million
3 1.5 million 2.0 million 0.5 million
4 1.5 million 2.5 million 0.5 million
The quarterback discounts all cash flows at 12 percent. Which of the three contracts offers the most value?
a. Contract 1; its present value is $4.56 million.
b. Contract 2; its present value is $5.10 million.
c. Contract 3; its present value is $4.20 million.
d. Either Contract 2 or Contract 3; each provides a present value of $5.10 million.
e. Either Contract 1 or Contract 2; each provides a present value of $5.10 million.
ANSWERS TO SELFTEST QUESTIONS
1. cash outflow
2. cash inflow
3. Compounding
4. future value
5. present value
6. interest
7. future value; n
8. discounting; compounding
9. opportunity cost rate
10. annuity; ordinary; due
11. perpetuity
12. constant; uneven (nonconstant)
13. sum
14. simple; effective
15. Fractional
16. Amortized
17. periodic
18. b. The EAR is always greater than or equal to the simple interest rate.
19. a. Both these statements are correct.
20. d. The slower the cash flows come in and the higher the interest rate, the lower the present value.
21. c. As the discount rate increases, the present value of a future sum decreases and eventually approaches zero.
22. d. 8.2432 percent is the EAR corresponding to a simple rate of 8 percent with quarterly compounding, and we would discount back for 10/12 of a year at the EAR to obtain the present value. Statement a is false because the periodic interest rate is equal to the simple interest rate divided by the number of compounding periods, so it will be equal to or smaller than the simple interest rate. Statement b is false because the EAR will equal the simple interest rate if there is one compounding period per year (annual compounding). Statement c is false because we can determine present or future values under the stated conditions.
SOLUTIONS TO SELFTEST PROBLEMS
1. d. 0 1 2 3 4 5 6
ADVANCE \u7       
1,000 FV6 = ?
With a financial calculator, input N = 6, I = 8, PV = 1000, PMT = 0, and solve for EMBED Equation.2
2. a. 0 1 2 3 4 5 6 Years
0 1 2 3 4 5 6 7 8 9 10 11 12 Periods
ADVANCE \u7             
1,000 FV12 = ?
With a financial calculator, input N = 12, I = 4, PV = 1000, PMT = 0, and then solve for FV = $1,601.03. The difference, $1,601.03 $1,586.87 = $14.16.
3. c. 0 1 2
ADVANCE \u7   
500 600
With a financial calculator, input N = 2, PV = 500, PMT = 0, FV = 600, and solve for EMBED Equation.2
4. c. 0 N = ?
ADVANCE \u7  
1.00 0.50
With a financial calculator, input I = 4, PV = 1.00, PMT = 0, and FV = 0.50. Solve for N = 17.67 H" 18 years.
5. c. 0 1 2 3 4 5
ADVANCE \u7      
1 2
With a financial calculator, input N = 5, PV = 1, PMT = 0, FV = 2, and solve for I = 14.87%.
6. b. 0 1 2 3 4 5
ADVANCE \u7      
1,000 1,000 1,000 1,000 1,000
FVA5 = ?
With a financial calculator, input N = 5, I = 6, PV = 0, PMT = 1000, and solve for FV = $5,637.09.
7. d. 0 1 2 3 4 5
ADVANCE \u7      
1,000 1,000 1,000 1,000 1,000 FVA5 = ?
With a financial calculator, switch to BEG mode, then input N = 5, I = 6, PV = 0, PMT = 1,000, and solve for FV = $5,975.32. Be sure to switch back to END mode.
8. e. 0 1 2 3 4 5 Years
0 1 2 3 4 5 6 7 8 9 10 Periods
ADVANCE \u7           
500 500 500 500 500 500 500 500 500 500
FVA10 = ?
With a financial calculator, input N = 10, I = 3, PV = 0, PMT = 500, and solve for FV = $5,731.94.
9. a. 0 1 2 3 4 5 6 7 8
ADVANCE \u7         
PV = ? 1,000
With a financial calculator, input N = 8, I = 7, PMT = 0, FV = 1000, and solve for PV = $582.01.
10. e. Using your financial calculator, enter the following data: I = 8; PV = 20000; PMT = 7500; FV = 375000; N = ? Solve for N = 18.4. It will take 18.4 years for Jane to accumulate $375,000.
11. d. 0 1 2 3 4 5 6
ADVANCE \u7       
PVA = ? 800 800 800 800 800 800
With a financial calculator, input N = 6, I = 5, PMT = 800, FV = 0, and solve for PV = $4,060.55.
12. c. 0 1 2 3 20
    
60,000 7,047.55 7,047.55 7,047.55 7,047.55
With a financial calculator, input N = 20, PV = 60000, PMT = 7047.55, FV = 0, and solve for I = 10.00%.
13. c. 0 1 2 3 4 5 Years
0 1 2 3 4 5 6 7 8 9 10 Periods
ADVANCE \u7           
PMT PMT PMT PMT PMT PMT PMT PMT PMT PMT
7,500
With a financial calculator, input N = 10, I = 3, PV = 0, FV = 7500, and solve for PMT = $654.23.
14. e. PV = PMT/k = $100/0.12 = $833.33.
15. b. With a financial calculator, using the cash flow register, CFADVANCE \u1jADVANCE \d1, input 0; 2000; 2000; 2000; 3000; and 4000. Enter I = 12 and solve for NPV = $4,440.51.
16. c. EAR = (1 + kSIMPLE/m)m 1.0
= (1 + 0.12/12)12 1.0
= (1.01)12 1.0
= 1.1268 1.0
= 0.1268 = 12.68%.
17. d. Here we want to have the same effective annual rate on the credit extended as on the bank loan that will be used to finance the credit extension.
First, we must find the EAR on the bank loan. With a financial calculator, enter P/YR = 12, NOM% = 16, and press EFF% to get EAR = 17.23%.
Now recognize that giving 3 months of credit is equivalent to quarterly compounding; interest is earned at the end of the quarter, so it is available to earn interest during the next quarter. Therefore, enter on your calculator P/YR = 4, EFF% = EAR = 17.23%, and press NOM% to find the simple interest rate of 16.21%. Therefore, if Martha charges a 16.21% simple interest rate and gives credit for 3 months, she will cover the cost of her bank loan.
Alternative solution: First, we need to find the effective annual rate charged by the bank:
EAR = (1 + kSIMPLE/m)m 1
= (1 + 0.16/12)12 1
= (1.0133)12 1 = 17.23%.
Now, we can find the simple rate Martha must quote her customers so that her financing costs are exactly covered:
17.23% = (1 + kSIMPLE/4)4 1
1.1723 = (1 + kSIMPLE/4)4
1.0405 = 1 + kSIMPLE/4
0.0405 = kSIMPLE/4
kSIMPLE = 16.22%.
18. a. Repayment on Remaining
Year Payment Interest Principal Principal Balance
1 $7,047.55 $6,000.00 $1,047.55 $58,952.45
2 7,047.55 5,895.25 1,152.30 57,800.15
19. d. With a financial calculator, input N = 2, I = 16, PV = 1000, PMT = 0, and solve for FV = $1,345.60.
For the new account, input N = 8, I = 4, PV = 1000, PMT = 0, and solve for FV = $1,368.57.
Thus, the new account will be worth $1,368.57 $1,345.60 = $22.97 more after 2 years.
To find the PV of difference, input N = 8, I = 4, PMT = 0, FV = 22.97, and solve for PV = $16.78. Therefore, the most you should be willing to pay the finder for locating the new account is $16.78.
20. e. With a financial calculator, input cash flows into the cash flow register, using 0 as the value for the unknown cash flow, input I = 12, and then press the NPV key to solve for the present value of the unknown cash flow, $4,783.29. This value should be compounded by (1.12)2, so that $4,783.29(1.2544) = $6,000.16 H" $6,000.
21. b. First, how much must you accumulate on your 18th birthday?
Present birthday = ?
18 19 20 21 22
ADVANCE \u7        
2,542.05 2,542.05 2,542.05 4,000 4,000 4,000 4,000
3,571.43
3,188.78
2,847.12
2,542.07
Total FV needed = $12,149.40
Using a financial calculator (with the calculator set for an ordinary annuity), enter N = 4, I = 12, PMT = 4000, FV = 0, and solve for PV = $12,149.40. This is the amount (or lump sum) that must be present in your bank account on your 18th birthday in order for you to be able to withdraw $4,000 at the end of each year for the next 4 years.
Now, how many payments must you make to accumulate $12,149.20?
Using a financial calculator, enter I = 12, PV = 0, PMT = 2542.05, FV = 12149.40, and solve for N = 4. Therefore, if you make payments at 18, 17, 16, and 15, you are now 14.
22. c. This can be done with a calculator by specifying an interest rate of 5 percent per period for 20 periods.
N = 10 ( 2 = 20.
I = 10/2 = 5.
PV = 10000.
FV = 0.
PMT = $802.43.
Set up an amortization table:
Beginning Payment of Ending
Period Balance Payment Interest Principal Balance
ADVANCE \d21 $10,000.00 $802.43 $500.00 $302.43 $9,697.57
ADVANCE \d22 9,697.57 802.43 484.88
$984.88
You can really just work the problem with a financial calculator using the amortization function. Find the interest in each 6month period, sum them, and you have the answer. Even simpler, with some calculators such as the HP17B, just input 2 for periods and press INT to get the interest during the first year, $984.88.
23. e. 0 1 2 3 4
ADVANCE \u7     
PV = ? 50 50 50 1,050
Discount rate: Effective annual rate on bank deposit:
EAR = (1 + 0.08/4)4 1 = 8.24%.
Input the cash flows in the cash flow register, input I = 8.24, and solve for NPV = $893.26. Or, get PV = $893.26 by inputting N = 4, I = 8.24, PMT = 50, and FV = 1000. Alternatively, each cash flow could be discounted to t = 0 and summed.
0 1 2 3 4
ADVANCE \u7     
PV = ? 50 50 50 1,050
46.19
42.68
39.43
764.96
PV = 893.26
PV = EMBED Equation.3
24. a. Input N = 5, I = 15, PV = 1000000, and FV = 0 to solve for PMT = $298,315.55.
Beginning Payment of Ending
Year Balance Payment Interest Principal Balance
ADVANCE \d21 $1,000,000.00 $298,315.55 $150,000.00 $148,315.55 $851,684.45
ADVANCE \d2 2 851,684.45 298,315.55 127,752.67 170,562.88 681,121.57
The fraction that is principal is $170,562.88/$298,315.55 = 57.18%.
25. b. Start with a time line to picture the situation:
Bank: Simple = 14%; EAR = 14.93%.
0 1 2 3 4 5 6 7 8 9 10 11 12
            
Insurance company: EAR = 14.93%; Simple = 14.16%.
0 1 2 3 4
    
Here we must find the EAR on the bank loan and then find the quarterly simple rate for that EAR. The bank loan amounts to a simple 14 percent, monthly compounding.
Using the interest conversion feature of the calculator, or the EAR formula, we must find the EAR on the bank loan. Enter P/YR = 12 and NOM% = 14, and then press the EFF% key to find EAR bank loan = 14.93%.
Now, we can find the simple interest rate with quarterly compounding that also has an EAR of 14.93 percent. Enter P/YR = 4 and EFF% = 14.93, and then press the NOM% key to get 14.16%. If the insurance company quotes a simple rate of 14.16%, with quarterly compounding, then the bank and insurance company loans would be equivalent in the sense that they both have the same effective annual rate, 14.93%.
Alternative solution:
EAR = (1 + kSIMPLE/12)12 1
= (1 + 0.14/12)12 1
= 14.93%.
14.93% = (1 + kSIMPLE/4)4 1
1.1493 = (1 + kSIMPLE /4)4
1.0354 = 1 + kSIMPLE /4
0.0354 = kSIMPLE /4
kSIMPLE = 14.16%.
26. e. Inflation = 3%.
0 1 2 3 4 5 6 7 8 9 10
          
PV = 15,000 PMT PMT PMT PMT PMT
School Grad.
ADVANCE \l128,982 28,982 28,982 28,982 28,982
Fixed income = $25,000(1.03)5 = $28,981.85.
1. Find the FV of $25,000 compounded for 5 years at 3 percent; that FV, $28,981.85, is the amount you will need each year while you are in school. (Note: Your real income will decline.)
2. You must have enough in 5 years to make the $28,981.85 payments to yourself. These payments will begin as soon as you start school, so we are dealing with a 5year, 5 percent interest rate annuity due. Set the calculator to BEG mode, because we are dealing with an annuity due, and then enter N = 5, I = 5, PMT = 28981.85, and FV = 0. Then press the PV key to find the PV, $131,750.06. This is the amount you must have in your account 5 years from today. (Do not forget to switch the calculator back to END mode.)
3. You now have $15,000. It will grow at 5 percent to $19,144.22 after 5 years. Enter N = 5, I = 5, PV = 15000, and PMT = 0, to solve for FV = $19,144.22. You can subtract this amount to determine the FV of the amount you must save: $131,750.06 $19,144.22 = $112,605.84.
4. Therefore, you must accumulate an additional $112,605.84 by saving PMT per year for 5 years, with the first PMT being deposited at the end of this year and earning a 5 percent interest rate. Now we have an ordinary annuity, so be sure you returned your calculator to END mode. Enter N = 5, I = 5, PV = 0, FV = 112605.84, and then press PMT to find the required payments, $20,378.82.
27. c. Find the EAR on the TV dealers credit. Use the interest conversion feature of your calculator. First, though, note that if you are charged a 15 percent simple interest rate, you will have to pay interest of 15%/4 = 3.75% after 3 months. The dealer then has the use of the interest, so he can earn 3.75 percent on it for the next three months, and so forth. Thus, we are dealing with quarterly compounding. The simple rate is 15 percent, quarterly compounding.
Enter NOM% = 15, P/YR = 4, and then press EFF% to get EAR = 15.8650%.
You should be indifferent between the dealer credit and the bank loan if the bank loan has an EAR of 15.8650 percent. The bank is using monthly compounding, or 12 periods per year. To find the simple interest rate at which you should be indifferent, enter P/YR = 12, EFF% = 15.8650, and then press NOM% to get NOM% = 14.8163%.
Conclusion: A loan that has a 14.8163 percent simple rate with monthly compounding is equivalent to a 15 percent simple rate loan with quarterly compounding. Both have an EAR of 15.8650 percent.
Alternative Solution:
EAR = (1 + kSIMPLE/4)4 1 = (1 + 0.15/4)4 1 = (1.0375)4 1 = 15.8650%.
15.8650% = (1 + kSIMPLE/12)12 1
1.15865 = (1 + kSIMPLE/12)12
kSIMPLE = 14.8163%.
28. a. Information given:
1. Will save for 10 years, then receive payments for 25 years.
2. Wants payments of $60,000 per year in todays dollars for the first payment only. Real income will decline. Inflation will be 5 percent. Therefore, to find the inflated fixed payments, we have this time line:
0 10
          
60,000 FV = ?
Enter N = 10, I = 5, PV = 60000, PMT = 0, and press FV to get FV = $97,733.68.
3. He now has $150,000 in an account that pays 7 percent, annual compounding. We need to find the FV of $150,000 after 10 years. Enter N = 10, I = 7, PV = 150000, PMT = 0, and press FV to get FV = $295,072.70.
4. He wants to withdraw, or have payments of, $97,733.68 per year for 25 years, with the first payment made at the beginning of the first retirement year. So, we have a 25year annuity due with PMT = $97,733.68, at an interest rate of 7 percent. (The interest rate is 7 percent annually, so no adjustment is required.) Set the calculator to BEG mode, then enter N = 25, I = 7, PMT = 97733.68, FV = 0, and press PV to get PV = $1,218,673.90. This amount must be on hand to make the 25 payments.
5. Since the original $150,000, which grows to $295,072.70, will be available, he must save enough to accumulate $1,218,673.90 ( $295,072.70 = $923,601.20.
6. The $923,601.20 is the FV of a 10year ordinary annuity. The payments will be deposited in the bank and earn 7 percent interest. Therefore, set the calculator to END mode and enter N = 10, I = 7, PV = 0, FV = 923601.20, and press PMT to find PMT = $66,847.95.
29. b. Contract 1: Using your financial calculator, enter the following data: CF0 = 0; CF14 = 1500000; I = 12; NPV = ? Solve for NPV = $4,556,024.02
Contract 2: Using your financial calculator, enter the following data: CF0 = 0; CF1 = 1000000; CF2 = 1500000; CF3 = 2000000; CF4 = 2500000; I = 12; NPV = ? Solve for NPV = $5,101,003.65.
Contract 3: Using your financial calculator, enter the following data: CF0
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