Investments and Valuation: cram pack

Formula sheets, the key method steps for every topic and 8 practice problems, with full solutions at the back.

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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

  1. Draw a timeline with every cash flow and its timing.
  2. Match the rate to the period: a monthly rate for monthly payments.
  3. Use FV = PV·(1 + i)ⁿ for single amounts and the annuity formulas for equal payments.
  4. 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

  1. Find the coupon per period and the yield per period.
  2. Price = present value of the coupons (an annuity) + present value of the face value.
  3. For semi-annual coupons use half the coupon, half the yield and twice the periods.
  4. 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

  1. List all cash flows with their year; the investment at year 0 is negative.
  2. Discount each cash flow: CFt/(1 + r)t.
  3. Add them up to get the NPV. Positive means the project earns more than r.
  4. For the IRR, find the rate that makes NPV zero by trial or interpolation.

2Practice problems

1.Time value of moneyMedium
years0123€1 000FV = ?

You invest €1 000 at a nominal rate of 6% per year, compounded monthly. Find the value FV of the investment after 3 years.

PV = €1 0006% / 12n = 3
FV = €
2.Time value of moneyHard
months0123…48€30 000AAAA3.6% / 12, I = ?

A loan of €30 000 is repaid with equal monthly payments over 4 years at 3.6% per year, compounded monthly. How much interest I is paid in total over the life of the loan?

P = €30 0003.6% / 12N = 48
I = €
3.Bond pricing & yieldMedium
half-years0123…10€30€30€30 + €1 000P = ?

A bond with a face value of €1 000 pays a 6% annual coupon in two half-yearly payments and matures in 5 years. The yield to maturity is 5.5% per year. Find the price P of the bond.

F = €1 000coupon = 6%YTM = 5.5%n = 5
P = €
4.Bond pricing & yieldHard
years012345€1 045€30€30 + €1 000

A bond with a face value of €1 000 and an annual coupon of 3% matures in 5 years and sells for €1 045. Find its yield to maturity YTM in percent.

F = €1 000coupon = 3%n = 5P = €1 045
YTM = %
5.CAPM & WACCMedium
WACC = ?equity€3 000 000re​ = 13%debt€3 000 000rd​ = 4%T = 25%

A company has equity worth €3 000 000 and debt worth €3 000 000. Its cost of equity is 13%, its pre-tax cost of debt is 4% and the tax rate is 25%. Find the WACC.

E = €3 000 000D = €3 000 000re = 13%rd = 4%T = 25%
WACC = %
6.CAPM & WACCHard
WACC = ?equity€10 000 000re​ = 13%bonds2 000 × €884coupon 6%, n = 12T = 20%

A company has equity with a market value of €10 000 000 and a cost of equity of 13%. Its debt consists of 2 000 bonds (face value €1 000, annual coupon 6%, 12 years to maturity) that trade at €884 each. The tax rate is 20%. Find the WACC, using the yield to maturity of the bonds as the pre-tax cost of debt.

E = €10 000 000re = 13%bonds: 2 000 × €884coupon = 6%n = 12T = 20%
WACC = %
7.NPV & IRRMedium
years0123456−50 00010 50010 50010 50010 50010 50020 500

A machine costs €50 000 today. It generates €10 500 at the end of each year for 6 years and can then be sold for €10 000. The cost of capital is 8%. Find the net present value NPV.

C0 = €50 000CF = €10 500S = €10 000n = 6r = 8%
NPV = €
8.NPV & IRRHard
years0123−25 00013 5009 00016 000

A project costs €25 000 and returns €13 500, €9 000, €16 000 at the end of years 1 to 3. Find its internal rate of return IRR in percent.

CF0 = −25 000CF1 = 13 500CF2 = 9 000CF3 = 16 000
IRR = %

3Solutions

1.Time value of money

Answer: FV = 1197 €

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.

Rate and number of periods

i = r/m = 0.06/12 = 0.005
N = m·n = 12·3 = 36

Future value

FV = 1 000·(1 + 0.005)36 = 1 000·1.197 = €1 196.68

Answer

FV = €1 196.68
2.Time value of money

Answer: I = 2257 €

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 payment

i = 0.003, N = 48
A = 30 000·0.003/(1 − (1 + 0.003)−48) = €672.02

Total interest

I = N·A − P = 48·672 − 30 000 = €2 256.72

Answer

I = €2 256.72
3.Bond pricing & yield

Answer: P = 1022 €

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 = €30.00, i = 0.0275, N = 10

Present value of the coupons

€30.00·(1 − 0.7624)/0.0275 = €259.20

Present value of the face value

€1 000·0.7624 = €762.40

Price

P = €1 021.60

Answer

P = €1 021.60

The yield is below the coupon rate, so the bond sells at a premium.

4.Bond pricing & yield

Answer: YTM = 2.044 %

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

€1 045 = €30·(1 − (1 + y)⁻⁵)/y + €1 000/(1 + y)⁵

Solve numerically

P(2%) = €1 047.13, P(3%) = €1 000.00
YTM = 2.044%

Answer

YTM = 2.044%
5.CAPM & WACC

Answer: WACC = 8 %

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

V = €6 000 000, E/V = 0.5, D/V = 0.5

WACC

WACC = 0.5·13% + 0.5·4%·(1 − 0.25) = 8%

Answer

WACC = 8%
6.CAPM & WACC

Answer: WACC = 11.95 %

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).

Cost of debt (YTM)

884 = 60·(1 − (1 + y)−12)/y + 1000/(1 + y)12
y = 7.5%

Market values

D = 2 000·€884 = €1 768 000
V = €11 768 000, E/V = 0.8498, D/V = 0.1502

WACC

WACC = 0.8498·13% + 0.1502·7.5%·(1 − 0.2) = 11.95%

Answer

WACC = 11.95%
7.NPV & IRR

Answer: NPV = 4842 €

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.

Present value of the yearly cash flows

10 500·4.623 = 48 540.24

Present value of the salvage value

10 000/1.587 = 6 301.70

NPV

NPV = −50 000 + 48 540.24 + 6 301.70 = €4 841.93

Answer

NPV = €4 841.93
8.NPV & IRR

Answer: IRR = 24.34 %

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.

Bracket the IRR

NPV falls as the rate rises, so the IRR lies between a rate with positive NPV and one with negative NPV.

NPV(20%) = 1 759.26
NPV(25%) = −248.00

Narrow down

Linear interpolation gives a first estimate; repeating it (or a calculator's IRR function) gives the exact rate.

IRR ≈ 20 + 5·1 759.26/(1 759.26 − (−248.00)) = 24.38%
exact: NPV(24.34%) = 0 → IRR = 24.34%

Answer

IRR = 24.34%

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