Formulas Flashcards
Annual Equivalent Rate (AER)
CASH INVESTMENTS
SEE LATER CARD FOR MORE DETAILED EQUATION WHERE MORE FREQUENT INTEREST PAYMENTS USED
Annual rate = (1 + r)n
r = nominal rate of interest n = number of periods in which interest will be paid
Example: 3.6% paid quarterly
- 6% / 4 = 0.9
- 9 / 100 = 0.009
- 009 + 1 = 1.009
- 009 to the power of 4, which is:
(1. 009 x 1.009 x 1.009 x 1.009) = 1.03648
1.03648 - 1 = 0.03648
0.03648 x 100 = 3.648
Round up to 2 decimal places = 3.65%
Conversion Premium / Discount for Convertible Bonds
BOND INVESTMENTS
Calculation:
mb ( ------------ -1 ) x100 = x% (premium or discount) cr x ms
mb = market price of the bond cr = number of shares the bond stock will buy ms = market price of the ordinary shares
Example:
£110 ( ----------------- -1 ) x100 = 10% £25 x £4.00
Interest Yield
BOND INVESTMENTS
CALCULATION
DESCRIPTION
Calculation:
Coupon Interest Yield = ------------------- x 100 Clean price
Example:
Coupon = 8% Clean price (purchase price) = £124.27
8 6.44% = ------------------- x 100 £124.27
BOND INTEREST YIELD
- expresses the annual income from a bond as a percentage of the price an investor would pay for the bond
ISSUES
- can be misleading as bonds may create a capital gain or loss if held until redemption, depending upon the price at which they were purchased
- bonds may trade above or below their par or nominal value because their prices are not fixed
- if the coupon is above current interest rates and the issuer has a strong credit rating, the bond will trade above par
Redemption Yield (Part 1 of 2)
BOND INVESTMENTS
THIS IS ALSO SHOWN LATER ON (SIMPLIFIED)
Market Price (mp) Calculation:
Face value x clean price / 100 = mp
Example:
£1,000 x £124.27 / 100 = £1,242.70
Redemption Yield (Part 2 of 2)
BOND INVESTMENTS
Calculation:
(par - mp) / years to redemption)
Interest yield + ( ———————————————– x100)
mp
mp = market price
Step 1 = work out the INTEREST YIELD Step 2 = work out the MARKET PRICE Step 3 = do the calculation (as above) Negative figure = capital loss Positive figure = capital gains Step 4 = deduct the % answer to the above from the interest yield to get the redemption yield (if the figure from Step 3 is negative, ignore the minus and deduct such as IT 6.44% + - 4.88% = 1.56% RY)
Example:
(£1,000 - £1,242.70) / 4) 6.44% + ( --------------------------------------- x100) = 4.88% £1,242.70
HIGHER REDEMPTION YIELD IS BETTER WHEN COMPARING
Duration
BOND INVESTMENTS
Duration allows the sensitivity of one bond verses another to be compared:
E Net present value of the cash flows to be received
Modified Duration 1 of 2
BOND INVESTMENTS
Modified Duration allows us to compare the sensitivity of a bond to changes in interest rates.
- This estimates how much a bond’s price will change if there is a change in interest rates
Duration --------------------------------------- (1 + Gross Redemption Yield)
Example:
- Duration of 2.88
- GRY of 5%
2.88 ------------------ = 2.74 (1 + 0.05)
Modified Duration 2 of 2
BOND INVESTMENTS
Can calculate what effect a % rise (say 1%) in yields will be on the bond’s price.
Our Duration of 2.74 means that the price should change by 2.74%.
A bond priced at 97.28 would therefore fall (because the yield has risen) by:
97.28 - (97.28 x 0.0274) = 94.61
Ex-Rights Price
EQUITY INVESTMENTS
Example: Issue of 1 for2. Existing shares are £3 each:
Number of Shares Price Value
Before Issue 2 £4.50 £9
Rights Issue* 1 £3.00 £3
After Rights Issue** 3 £12
- Rights issue gives the right to subcribe for one new share at £3
- *After the rights issue, three shares are valued at £12
Ex-rights price is £12 / 3 = £4 a share
Rights Premium
EQUITY INVESTMENTS
Using the example from ‘Ex-Rights Price’:
Ex-Rights price of £4 - new share (rights issue) price of £3 = £1 (Rights Premium)
Bonus Issues & Share Splits
EQUITY INVESTMENTS
This is where the number of shares is increased either issuing more shares (bonus issue) or splitting the existing shares (share splits).
New share price is worked out as:
Value of the shares / the new number of shares
Initial Yield
PROPERTY INVESTMENTS
Returns on an investment in property are meansured by an INITIAL YIELD (which is a %) as follows:
Annual rental income Initial Yield = ----------------------------------- x 100 price of the property
- is used to compare property investments
- is inaccurate as a comparison measure because it does not allow for rental growth that a lease provides
- doesn’t take into account the growth resulting from future rent reviews
Unit Trust Buying & Selling Prices
Calculation:
NAV ------------------------------------------ = Buying & selling prices Number of units in existence
Gross Domestic Produce (GDP)
GDP Calculation:
GDP = C + I + G + (X - M)
C = Consumption (expenditure of households on goods and services) I = Invesment (expenditure of businesses and individuals for capital investment) G = Government spending X = Exports M = Imports
Capital Asset Pricing Model (CAPM)
CAPM derives the theoretical expected return for a risky security as a combination of the:
- return on a risk-free asset (such as a treasury gilt)
- risk premium (the compensation for holding a risky investment)
CAPM Equation:
E(Ri) = Rf + Bi (Rm - Rf)
E(Ri) = expected return on the risky investment
Rf = rate of return on risk-free asset
Rm - expected return of model portfolio
Bi = beta (sensitivity of investment to overall market)
(Rm - Rf) = market risk premium
Bi (Rm - Rf) = risk premium of the risky investment
Capital Asset Pricing Model (CAPM) - Assumptions
CAPM is based on a set of assumptions:
- investors are rational and risk adverse
- all investors have an identical holding period
- no one individual can affect the market price
- no taxes, transaction costs etc
- information is free and available to all investors
- all investors can borrow/lend unlimited money
- quantity of risky securities in the market is fixed
Holding Period Return - Calculation
HOLDING PERIOD RETURN CALCULATION:
D + V1 - V0 R = ------------------- x 100 to get a % V0
R = holding period return D = income received during the period V0 = price/value at acquisition V1 = price on selling
EXAMPLE:
Investment costs £100, pays a dividend of £10 and is sold for £110 after six months
£10 + £110 - £100 R = ------------------- = 0.20 x 100 = 20% £100
Holding Period Return - Description
HOLDING PERIOD RETURN
- compares returns on different investment
- encompasses the total return, including income and capital gains, over a period
- expressed as a percentage (%) of the original cost
- it equals all income received plus capital gains during the period as a % of the original investment
DISADVANTAGES:
- period looked at must be the same when comparing two investments
- does not take into consideration timing of cash flows or compounding of returns
Relative Return - Calculation
RELATIVE RETURN CALCULATION:
rREL = r - rB
r = the total holding period return rB = the benchmark return
EXAMPLE:
Portfolio has a total return of 12% and the benchmark rose by 10%
rREL = 12% - 10% = 2%
Relative Return - Description
RELATIVE RETURN
- is the return from an investment/portfolio measured against the return from a benchmark index
- shows how well the investment/portfolio has performed relative to a benchmark
- measures whether a fund manager had added value above the index return
MWR - Calculation
MONEY WEIGHTED RATE OF RETURN CALCULATION
D + V1 - V0 - C MWR = ----------------------- V0 + (C x n / 12)
n = number of months remaining in the year C = the new money introduced during the year V0 = the price or value at acquisition V1 = the price on selling
EXAMPLE
V0 = £20,000 V1 = £24,000 D = nothing as no income paid out Money In = £3,000 in March Money Out = £2,000 in September (withdrawal)
D + V1 - V0 - C MWR = ------------------------------------------- V0 + (C x n / 12) + (C x n /12) 0 + 24,000 - 20,000 - 1,000 MWR = --------------------------------------------------- [20,000 + (3,000x9/12) + (-2,000x3/12)] 3,000 MWR = --------------------------------- = 0.1379 x 100 = 13.79% 20,000 + 2,250 - 500
MWR - Description
MONEY WEIGHTED RATE OF RETURN
- a modified form of the holding period return
- adjusts for cash inflows into the portfolio
ISSUES
- not considered appropriate when trying to compare different portfolios
- strongly influenced by the timing of cash flows
- does not identify whether the overall return for the investor is due to the ability of the fund manager or as a result of when additional funds were invested
TWR - Calculation
TIME WEIGHTED RATE OF RETURN CALCULATION
1 + R = (1 + r1) (1 + r2) (1 + r3) (1 + r4) … (1 + rn)
R = TWR ri = holding period return in each sub-period
EXAMPLE
- Portfolio starting value of £100m
- Value after 6 months is £110m
- £2m cash dividend paid out
- Value at end of 12 moths is £130m
- HOLDING PERIOD
D + V1 - V0 R = ------------------- x 100 to get a % V0
R = holding period return D = income received during the period V0 = price/value at acquisition V1 = price on selling
2 + 110 - 100 r1 = --------------------- = 0.12 x 100 = 12% 100 130 - 110 r2 = --------------------- = 0.1818 x 100 = 18.18% 110
- LINK THE RETURNS TO CALCULATE THE TWR
1 + R = (1 + r1) (1 + r2)
1 + R = (1.12) (1.1818)
1 + R = 1.3236
R = 1.3236 - 1 R = 0.3236 or 32.36% (0.3236 x 100)
TWR - Description
TIME WEIGHTED RATE OF RETURN
- can compare the performance of one fund manager to another by eliminating distortions caused by the timing of new money
- does this by breaking down the return for a particular period into sub-periods
Investment Bond - Redemption Yield
SIMPLIFIED CALCULATION
REDEMPTION YIELD CALCULATION:
gain or loss / years to maturity to maturity Interest Yield + or - ------------------------------------------- x100 clean price
EXAMPLE
- stock purchased for £126.85 per £100
- at redemption there will be a capital loss of £126.68 - £100 = £26.85
- five years to redemption
- capital loss each year is £26.85 / 5 = £5.37
- reduction in return is:
- 5.37
- ——– x 100 = -4.23
126. 85 - interest yield of 6.31% - -4.23 = redemption yield of 2.08%
Investment Bond - Redemption Yield
DESCRIPTION
BOND REDEMPTION YIELD
- is a more accurate calculation of the yield on a bond
- takes into account the income payments from a bond and the capital gain or loss from holding the bond until maturity
- adjusts the value of each payment according to when it is received
- assumes the bond is held to maturity and that coupons can be reinvested at the redemption yield
- assumes that the investor reinvests each interest payment
Sharpe Ratio
CALCULATION
SHARPE RATIO CALCULATION:
standard deviation of the return on the investment
EXAMPLE:
Return = 10%
Risk-free return = 4%
Standard Deviation = 8%
10 - 4 Sharpe Ratio = ------------ = 0.75 (or 0.75%) 8
Portfolio earned a 0.75% return above the risk-free investment.