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
years01234PV = ?€20 000

You need €20 000 in 4 years. An account pays 3.6% per year, compounded monthly. How much must you deposit today? Find the present value PV.

FV = €20 0003.6% / 12n = 4
PV = €
2.Time value of moneyHard
months0123…360€250 000A?AAA

A loan of €250 000 is repaid with equal monthly payments over 30 years. The interest rate is 7.2% per year, compounded monthly. Find the monthly payment A.

P = €250 0007.2% / 12N = 360
A = €
3.Bond pricing & yieldMedium
years0123…10€1 291C = ?C = ?C = ? + €1 000

A bond with a face value of €1 000 matures in 10 years and pays annual coupons. It sells for €1 291 when the yield to maturity is 3.5%. Find the coupon rate c in percent.

F = €1 000n = 10P = €1 291YTM = 3.5%
c = %
4.Bond pricing & yieldHard

A bond trades at €915 with a yield to maturity of 5% (annual compounding) and a Macaulay duration of 11.6 years. Use the modified duration to estimate the new price P if the yield falls by 25 basis points.

P0 = €915y = 5%D = 11.6Δy = −25 bp
P = €
5.CAPM & WACCMedium
WACC = ?equityEre​ = 13%debtD = 0.4·Erd​ = 4.5%T = 28%

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 4.5% and the tax rate is 28%. Find the WACC.

D/E = 0.4re = 13%rd = 4.5%T = 28%
WACC = %
6.CAPM & WACCHard
WACC = ?equity2 000 000 × €35.00D0​ = €1.40g = 2%debt€70 000 000rd​ = 4.5%T = 30%

A company has 2 000 000 shares trading at €35.00; the book value of its equity is €28 000 000. It just paid a dividend of €1.40 per share, and dividends grow by 2% per year. Its debt has a market value of €70 000 000 and a pre-tax cost of 4.5%. The tax rate is 30%. Find the WACC, using the dividend growth model for the cost of equity.

N = 2 000 000P0 = €35.00book equity = €28 000 000D0 = €1.40g = 2%D = €70 000 000rd = 4.5%T = 30%
WACC = %
7.NPV & IRRMedium
years0123…8−50 0006 5006 5006 50014 000

A machine costs €50 000 today. It generates €6 500 at the end of each year for 8 years and can then be sold for €7 500. The cost of capital is 12%. Find the net present value NPV.

C0 = €50 000CF = €6 500S = €7 500n = 8r = 12%
NPV = €
8.NPV & IRRHard
years01234−20 0006 0006 0006 0006 000

An investment of €20 000 returns €6 000 at the end of each year for 4 years. Find its internal rate of return IRR in percent.

C0 = €20 000CF = €6 000n = 4
IRR = %

3Solutions

1.Time value of money

Answer: PV = 17321 €

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 = 0.036000000000000004/12 = 0.003
N = 12·4 = 48

Present value

PV = FV/(1 + i)N = 20 000/1.155 = €17 321.49

Answer

PV = €17 321.49
2.Time value of money

Answer: A = 1697 €

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 = 0.07200000000000001/12 = 0.006
N = 12·30 = 360

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 = 0.1161
A = 250 000·0.006/(1 − 0.1161) = €1 696.97

Answer

A = €1 696.97
3.Bond pricing & yield

Answer: c = 6.999 %

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.

Present value of the face value

1000·(1 + 0.035)−10 = €708.92

Coupon

C = (1291 − 708.92)/8.317 = €69.99

Coupon rate

c = 69.99/1000 = 6.999%

Answer

c = 6.999%
4.Bond pricing & yield

Answer: P = 940.3 €

Duration: the Macaulay duration is the weighted average time at which a bond pays its cash flows, with the present values of the cash flows as weights: D = Σ t·PVₜ/P. The modified duration D/(1 + y) estimates the percentage price change for a small change in yield: %ΔP ≈ −Dmod·Δy.

Modified duration

Dmod = 11.6/1.05 = 11.05

Estimated price change

%ΔP ≈ −11.05·(−0.0025) = 2.762%
P ≈ 915·(1 + 0.02762) = €940.27

Answer

P = €940.27

Duration is a linear estimate; for large yield changes convexity makes the true price a little higher.

5.CAPM & WACC

Answer: WACC = 10.21 %

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% + 0.2857·4.5%·(1 − 0.28) = 10.21%

Answer

WACC = 10.21%
6.CAPM & WACC

Answer: WACC = 4.615 %

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 equity

D1 = 1.4·1.02 = €1.43
re = 1.428/35 + 0.02 = 6.08%

Market values

E = 2 000 000·€35.00 = €70 000 000
V = €140 000 000, E/V = 0.5, D/V = 0.5

WACC

WACC = 0.5·6.08% + 0.5·4.5%·(1 − 0.3) = 4.615%

Answer

WACC = 4.615%
7.NPV & IRR

Answer: NPV = −14681 €

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

6 500·4.968 = 32 289.66

Present value of the salvage value

7 500/2.476 = 3 029.12

NPV

NPV = −50 000 + 32 289.66 + 3 029.12 = −€14 681.22

Answer

NPV = −€14 681.22
8.NPV & IRR

Answer: IRR = 7.714 %

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)−4)/i = 20 000/6 000 = 3.333

Solve for the rate

The annuity factor falls as the rate rises; bracket the rate and narrow down.

i = 7%: 3.387
i = 8%: 3.312
IRR = 7.714%

Answer

IRR = 7.714%

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