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1Formulas and methods
Time value of money
Future value
FV = PV·(1 + i)n
Present value
PV = FV/(1 + i)n
Several periods per year
i = r/m, N = m·n
Annuity, present value
PV = PMT·[1 − (1 + i)−n]/i
Annuity, future value
FV = PMT·[(1 + i)n − 1]/i
Method
Draw a timeline with every cash flow and its timing.
Match the rate to the period: a monthly rate for monthly payments.
Use FV = PV·(1 + i)ⁿ for single amounts and the annuity formulas for equal payments.
Check the sign and the order of magnitude of the answer.
Bond pricing & yield
Bond price
P = C·(1 − (1 + y)−n)/y + F/(1 + y)n
Semi-annual
C/2, y/2 and 2n periods
Current yield
C/P
Price and yield
yield up → price down
Method
Find the coupon per period and the yield per period.
Price = present value of the coupons (an annuity) + present value of the face value.
For semi-annual coupons use half the coupon, half the yield and twice the periods.
Check: if the yield is above the coupon rate, the price is below face value.
CAPM & WACC
CAPM
re = rf + β·(rm − rf)
WACC
E/V·re + D/V·rd·(1 − T)
Firm value
V = E + D
NPV & IRR
Net present value
NPV = −C0 + Σ CFt/(1 + r)t
Equal cash flows
NPV = −C0 + CF·[1 − (1 + r)−n]/r
Internal rate of return
the r at which NPV = 0
Decision
accept when NPV > 0 (or IRR > required return)
Method
List all cash flows with their year; the investment at year 0 is negative.
Discount each cash flow: CFt/(1 + r)t.
Add them up to get the NPV. Positive means the project earns more than r.
For the IRR, find the rate that makes NPV zero by trial or interpolation.
2Practice problems
1.Time value of moneyMedium
A property is expected to earn net rent of €5 000 next year. The rent is expected to grow by 3% per year forever. The required return is 9% per year. Find the value PV of the property today.
C1 = €5 000g = 3%r = 9%
PV = €
2.Time value of moneyHard
A loan of €25 000 is repaid with equal monthly payments over 4 years. The interest rate is 4.2% per year, compounded monthly. Find the monthly payment A.
P = €25 0004.2% / 12N = 48
A = €
3.Bond pricing & yieldMedium
A bond with a face value of €1 000 pays a 4% annual coupon in two half-yearly payments and matures in 4 years. The yield to maturity is 5.5% per year. Find the price P of the bond.
F = €1 000coupon = 4%YTM = 5.5%n = 4
P = €
4.Bond pricing & yieldHard
A bond with a face value of €1 000 and an annual coupon of 6% matures in 10 years and sells for €835. Find its yield to maturity YTM in percent.
F = €1 000coupon = 6%n = 10P = €835
YTM = %
5.CAPM & WACCMedium
A company has a debt-to-equity ratio (at market values) of 0.4. Its cost of equity is 13%, its pre-tax cost of debt is 3% and the tax rate is 20%. Find the WACC.
D/E = 0.4re = 13%rd = 3%T = 20%
WACC = %
6.CAPM & WACCHard
A company's business has an unlevered (asset) beta of 0.7. It plans a debt-to-equity ratio of 0.4. The tax rate is 28%, the risk-free rate is 1% and the market risk premium is 5.5%. Find the cost of equity re at the new capital structure.
βU = 0.7D/E = 0.4T = 28%rf = 1%rm − rf = 5.5%
re = %
7.NPV & IRRMedium
A project costs €500 000 today. It generates €52 000 at the end of the first year, and the cash flow then grows by 2% per year forever. The cost of capital is 10%. Find the net present value NPV.
C0 = €500 000CF1 = €52 000g = 2%r = 10%
NPV = €
8.NPV & IRRHard
An investment of €25 000 returns €6 500 at the end of each year for 9 years. Find its internal rate of return IRR in percent.
C0 = €25 000CF = €6 500n = 9
IRR = %
3Solutions
1.Time value of money
Answer: PV = 83333 €
Time value of money: money today is worth more than the same amount later, because it can earn interest. With interest rate i per period, an amount grows as FV = PV·(1 + i)n. A series of equal payments (an annuity) is valued by adding up each payment, which gives the annuity formulas.
Time value of money: money today is worth more than the same amount later, because it can earn interest. With interest rate i per period, an amount grows as FV = PV·(1 + i)n. A series of equal payments (an annuity) is valued by adding up each payment, which gives the annuity formulas.
Monthly rate and number of payments
i = 0.042/12 = 0.0035
N = 12·4 = 48
Payment
The present value of N equal payments A is A·(1 − (1 + i)⁻ᴺ)/i. Set it equal to the loan and solve for A.
(1 + i)−N = 0.8456
A = 25 000·0.0035/(1 − 0.8456) = €566.72
Answer
A = €566.72
3.Bond pricing & yield
Answer: P = 946.8 €
Bond pricing: a bond’s price is the present value of its cash flows, discounted at the yield to maturity (YTM): the coupons form an annuity and the face value is paid back at maturity. P = C·(1 − (1 + y)⁻ⁿ)/y + F/(1 + y)ⁿ. When the yield is above the coupon rate the bond trades below face value, and the other way round.
Per period
C = €20.00, i = 0.0275, N = 8
Present value of the coupons
€20.00·(1 − 0.8049)/0.0275 = €141.89
Present value of the face value
€1 000·0.8049 = €804.91
Price
P = €946.79
Answer
P = €946.79
The yield is above the coupon rate, so the bond sells at a discount.
4.Bond pricing & yield
Answer: YTM = 8.517 %
Bond pricing: a bond’s price is the present value of its cash flows, discounted at the yield to maturity (YTM): the coupons form an annuity and the face value is paid back at maturity. P = C·(1 − (1 + y)⁻ⁿ)/y + F/(1 + y)ⁿ. When the yield is above the coupon rate the bond trades below face value, and the other way round.
Equation for the yield
€835 = €60·(1 − (1 + y)⁻¹⁰)/y + €1 000/(1 + y)¹⁰
Solve numerically
P(8%) = €865.80, P(9%) = €807.47
YTM = 8.517%
Answer
YTM = 8.517%
5.CAPM & WACC
Answer: WACC = 9.971 %
Cost of capital: CAPM gives the return shareholders require: re = rf + β·(rm − rf). The weighted average cost of capital mixes equity and debt by their market values: WACC = E/V·re + D/V·rd·(1 − T), with V = E + D. Interest is tax-deductible, hence the (1 − T).
Weights from D/E
E/V = 1/(1 + 0.4) = 0.7143
D/V = 0.4/(1 + 0.4) = 0.2857
WACC
WACC = 0.7143·13% + 0.2857·3%·(1 − 0.2) = 9.971%
Answer
WACC = 9.971%
6.CAPM & WACC
Answer: re = 5.959 %
Levered beta (Hamada): debt makes equity riskier. βL = βU·(1 + (1 − T)·D/E), where βU is the beta of the business without debt. To move a beta to another capital structure, unlever it first and then relever it at the new D/E.
Levered beta
βL = 0.7·(1 + 0.72·0.4) = 0.9016
Cost of equity (CAPM)
re = 1% + 0.9016·5.5% = 5.959%
Answer
re = 5.959%
7.NPV & IRR
Answer: NPV = 150000 €
Net present value: discount every cash flow back to today with the required rate of return r, then add them up: NPV = Σ CFₜ/(1 + r)ᵗ. A project with NPV > 0 earns more than r and adds value. The internal rate of return (IRR) is the rate at which NPV = 0.
Value of the cash flows
PV = 52 000/(0.1 − 0.02) = 650 000.00
NPV
NPV = 650 000.00 − 500 000 = €150 000.00
Answer
NPV = €150 000.00
NPV is positive, so the project earns more than the required return.
8.NPV & IRR
Answer: IRR = 21.49 %
Net present value: discount every cash flow back to today with the required rate of return r, then add them up: NPV = Σ CFₜ/(1 + r)ᵗ. A project with NPV > 0 earns more than r and adds value. The internal rate of return (IRR) is the rate at which NPV = 0.
Required annuity factor
(1 − (1 + i)−9)/i = 25 000/6 500 = 3.846
Solve for the rate
The annuity factor falls as the rate rises; bracket the rate and narrow down.