chapter 5 interest rates
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Chapter 5 Interest Rates. Chapter Outline. 5.1 Interest Rate Quotes and Adjustments 5.2 The Determinants of Interest Rates 5.3 Risk and Taxes 5.4 The Opportunity Cost of Capital. Learning Objectives. Define effective annual rate and annual percentage rate. - PowerPoint PPT PresentationTRANSCRIPT
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Chapter 5 Interest Rates
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Chapter Outline
5.1 Interest Rate Quotes and Adjustments
5.2 The Determinants of Interest Rates
5.3 Risk and Taxes
5.4 The Opportunity Cost of Capital
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Learning Objectives
1. Define effective annual rate and annual percentage rate.
2. Given an effective annual rate, compute the n-period effective annual rate.
3. Convert an annual percentage rate into an effective annual rate, given the number of compounding periods.
4. Describe the relation between nominal and real rates of interest.
5. Given two of the following, compute the third: nominal rate, real rate, and inflation rate.
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Learning Objectives (cont'd)
6. Describe the effect of higher interest rates on net present values in the economy.
7. Explain how to choose the appropriate discount rate for a given stream of cash flows, according to the investment horizon.
8. Discuss the determinants of the shape of the yield curve.
9. Explain why Treasury securities are considered risk free, and describe the impact of default risk on interest rates.
10. Given the other two, compute the third: after-tax interest rate, tax rate, and before-tax interest rate.
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5.1 Interest Rate Quotes and Adjustments The Effective Annual Rate
Indicates the total amount of interest that will be earned at the end of one year
Considers the effect of compounding Also referred to as the effective annual yield (EAY) or
annual percentage yield (APY)
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5.1 Interest Rate Quotes and Adjustments (cont'd) Adjusting the Discount Rate to Different
Time Periods
Earning a 5% return annually is not the same as earning 2.5% every six months.
(1.05)0.5 – 1= 1.0247 – 1 = .0247 = 2.47% Note: n = 0.5 since we are solving for the six month
(or 1/2 year) rate
Equivalent -Period Discount Rate (1 ) 1 nn r
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Example 5.1
Problem Insert Example 5.1 Problem
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Example 5.1 (cont'd)
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Annual Percentage Rates
The annual percentage rate (APR), indicates the amount of simple interest earned in one year.
Simple interest is the amount of interest earned without the effect of compounding.
The APR is typically less than the effective annual
rate (EAR).
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Annual Percentage Rates (cont'd) The APR itself cannot be used as a discount
rate. The APR with k compounding periods is a way
of quoting the actual interest earned each compounding period:
APRInterest Rate per Compounding Period
periods / yeark
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Annual Percentage Rates (cont'd) Converting an APR to an EAR
The EAR increases with the frequency of compounding. Continuous compounding is compounding every
instant.
1 1
kAPR
EARk
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Annual Percentage Rates (cont'd)
A 6% APR with continuous compounding results in an EAR of approximately 6.1837%.
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Example 5.2
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Example 5.2 (cont'd)
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Application: Discount Rates and Loans Amortizing loans
Payments are made at a set interval, typically monthly.
Each payment made includes the interest on the loan plus some part of the loan balance.
All payments are equal and the loan is fully repaid with the final payment.
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Application: Discount Rates and Loans (cont'd) Amortizing loans
Consider a $30,000 car loan with 60 equal monthly payments, computed using a 6.75% APR with monthly compounding. 6.75% APR with monthly compounding corresponds to a
one-month discount rate of 6.75% / 12 = 0.5625%.
60
30,000 $590.50
1 1 1 1 1 1
(1 ) 0.005625 (1 0.005625)
N
PC
r r
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Application: Discount Rates and Loans (cont'd) Amortizing loans
Financial Calculator Solution
N I/YR PV PMT FV
60 6.75 30000
-590.50
Gold12 P/YR
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Application: Discount Rates and Loans (cont'd) Computing the Outstanding Loan Balance
One can compute the outstanding loan balance by calculating the present value of the remaining loan payments.
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Example 5.3
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Example 5.3 (cont'd)
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5.2 The Determinants of Interest Rates Inflation and Real Versus Nominal Rates
Nominal Interest Rate: The rates quoted by financial institutions and used for discounting or compounding cash flows
Real Interest Rate: The rate of growth of your purchasing power, after adjusting for inflation
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5.2 The Determinants of Interest Rates (cont'd)
The Real Interest Rate
1 Growth of MoneyGrowth in Purchasing Power 1
1 Growth of Prices
r
rr
i
1
r
r ir r i
i
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Example 5.4
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Example 5.4 (cont'd)
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Alternative Example 5.4
Problem
In the year 2006, the average 1-year Treasury Constant Maturity rate was about 4.93% and the rate of inflation was about 2.58%.
What was the real interest rate in 2006?
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Alternative Example 5.4
Solution
Using Equation 5.5, the real interest rate in 2006 was:
(4.93% − 2.58%) ÷ (1.0258) = 2.29%
Which is approximately equal to the difference between the nominal rate and inflation: 4.93% – 2.58% = 2.35%
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Figure 5.1 U.S. Interest Rates and Inflation Rates,1955–2005
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Investment and Interest Rate Policy An increase in interest rates will typically
reduce the NPV of an investment.
Consider an investment that requires an initial investment of $10 million and generates a cash flow of $3 million per year for four years. If the interest rate is 5%, the investment has an NPV of:
2 3 4
3 3 3 3 10 $0.638 million
1.05 1.05 1.05 1.05 NPV
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Investment and Interest Rate Policy (cont'd)
If the interest rate rises to 9%, the NPV becomes negative and the investment is no longer profitable:
2 3 4
3 3 3 3 10 $0.281 million
1.09 1.09 1.09 1.09 NPV
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The Yield Curve and Discount Rates Term Structure: The relationship between
the investment term and the interest rate
Yield Curve: A graph of the term structure
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Figure 5.2 Term Structure of Risk-Free U.S. Interest Rates, January 2004, 2005, and 2006
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The Yield Curve and Discount Rates (cont'd) The term structure can be used to compute
the present and future values of a risk-free cash flow over different investment horizons.
Present Value of a Cash Flow Stream Using a Term Structure of Discount Rates
(1 )
n
nn
CPV
r
1 22
11 2
1 (1 ) (1 ) (1 )
NN N
N nnN n
C CC CPV
r r r r
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Example 5.5
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Example 5.5 (cont'd)
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Alternative Example 5.5
Problem
Compute the present value of a risk-free three-year annuity of $500 per year, given the following yield curve:
Term (Years) Rate1 5.06%2 4.88%3 4.79%
January-07
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Alternative Example 5.5
Solution
Each cash flow must be discounted by the corresponding interest rate:
2 3
$500 $500 $500
1.0506 1.0488 1.0479 PV
$475.92 $454.55 434.52 $1,364.99 PV
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The Yield Curve and the Economy The shape of the yield curve is influenced by
interest rate expectations. An inverted yield curve indicates that interest
rates are expected to decline in the future. Because interest rates tend to fall in response to an
economic slowdown, an inverted yield curve is often interpreted as a negative forecast for economic growth.
Each of the last six recessions in the United States was preceded by a period in which the yield curve was inverted.
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The Yield Curve and the Economy (cont'd) The shape of the yield curve is influenced by
interest rate expectations.
A steep yield curve generally indicates that interest rates are expected to rise in the future.
The yield curve tends to be sharply increasing as the economy comes out of a recession and interest rates are expected to rise.
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Figure 5.3 Short-Term Versus Long-Term U.S. Interest Rates and Recessions
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Example 5.6
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Example 5.6 (cont'd)
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5.3 Risk and Taxes
Risk and Interest Rates
U.S. Treasury securities are considered “risk-free.” All other borrowers have some risk of default, so investors require a higher rate of return.
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Table 5.2
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Example 5.7
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Example 5.7 (cont'd)
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After-Tax Interest Rates
Taxes reduce the amount of interest an investor can keep, and we refer to this reduced amount as the after-tax interest rate. ( ) 1 - r r r
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Example 5.8
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Example 5.8 (cont'd)
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5.4 The Opportunity Cost of Capital Opportunity Cost of Capital: The best
available expected return offered in the market on an investment of comparable risk and term to the cash flow being discounted
Also referred to as Cost of Capital