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Discounted Cash Flow Analysis (Time Value of Money). Future value Present value Rates of return. Time lines show timing of cash flows. 0. 1. 2. 3. i%. CF 0. CF 1. CF 2. CF 3.
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Discounted Cash Flow Analysis(Time Value of Money) • Future value • Present value • Rates of return
Time lines show timing of cash flows. 0 1 2 3 i% CF0 CF1 CF2 CF3 Tick marks at ends of periods, so Time 0 is today; Time 1 is the end of Period 1, or the beginning of Period 2; and so on.
Time line for a $100 lump sum due at the end of Year 2. 0 1 2 Years i% 100
Time line for an ordinary annuity of $100 for 3 years. 0 1 2 3 i% 100 100 100
Time line for uneven CFs -$50 at t = 0 and $100, $75, and $50 at the end of Years 1 through 3. 0 1 2 3 i% -50 100 75 50
What’s the FV of an initial$100 after 3 years if i = 10%? 0 1 2 3 10% 100 FV = ? Finding FVs is compounding.
After 1 year FV1 = PV + INT1 = PV + PV(i) = PV(1 + i) = $100(1.10) = $110.00. After 2 years FV2 = FV1(1 + i) = PV(1 + i)2 = $100(1.10)2 = $121.00.
After 3 years FV3 = PV(1 + i)3 = 100(1.10)3 = $133.10. In general, FVn = PV(1 + i)n.
PVIFi,n and FVIFi,n • FVIFi,n = (1+i)n EX. i=10%, n=7 = (1+.1)7 =1.94871 • PVIFi,n = 1/(1+i)n
What’s the PV of $100 due in 3 years if i = 10%? Finding PVs is discounting, and it’s the reverse of compounding. 0 1 2 3 10% PV = ? 100
Solve FVn = PV(1 + i )n for PV: PV = = FVn( ). n FVn (1 + i)n 1 1 + i PV = $100( ) = $100(PVIFi, n) = $100(0.7513) = $75.13. 1 1.10 3
If sales grow at 20% per year, how long before sales double? Solve for n: FVn = 1(1 + i)n 2 = 1(1.20)n (1.20)n = 2 n ln(1.20) = ln 2 n(0.1823) = 0.6931 n = 0.6931/0.1823 = 3.8 years.
Graphical Illustration: FV 2 3.8 1 Years 0 1 2 3 4
ordinary annuity and annuity due • An ordinary or deferred annuity consists of a series of equal payments made at the end of each period. • An annuity due is an annuity for which the cash flows occur at the beginning of each period. • Annuity due value=ordinary due value x (1+r)
What’s the difference between an ordinary annuity and an annuity due? Ordinary Annuity 0 1 2 3 i% PMT PMT PMT Annuity Due 0 1 2 3 i% PMT PMT PMT
What’s the FV of a 3-year ordinary annuity of $100 at 10%? 0 1 2 3 10% 100 100 100 110 121 FV = 331
What’s the PV of this ordinary annuity? 0 1 2 3 10% 100 100 100 90.91 82.64 75.13 248.69 = PV
PVIFAi,n and FVIFAi,n • PVIFAi,n = [1 - (1+i)-n ] / i • Ex. i=10%, n=3 • = [1 - (1+0.1)-3 ] / 0.1 • = 2.48685 • FVIFAi,n = [(1+i)n – 1] / i
Ordinary Annuity and Annuity Due Ordinary Annuity PVAn (OA)= PMT(PVIFAi,n) FVAn (OA)= PMT(FVIFAi,n) Annuity Due PVAn (AD)= PMT(PVIFAi,n)(1+i) FVAn (AD)= PMT(FVIFAi,n)(1+i)
Find the FV and PV if theannuity were an annuity due. 0 1 2 3 10% 100 100 100
What is the PV of this uneven cashflow stream? 0 1 2 3 4 10% 100 300 300 -50 90.91 247.93 225.39 -34.15 530.08 = PV
What interest rate would cause $100 to grow to $125.97 in 3 years? $100 (1 + i )3 = $125.97. (1+i)3 = 1.2597 (1+i) = 1.07999 i = 8% approx.
Will the FV of a lump sum be larger or smaller if we compound more often, holding the stated i% constant? Why? LARGER! If compounding is more frequent than once a year--for example, semiannually, quarterly, or daily--interest is earned on interest more often.
0 1 2 3 10% 100 133.10 Annually: FV3 = 100(1.10)3 = 133.10. 0 1 2 3 4 5 6 0 1 2 3 5% 100 134.01 Semiannually: FV6 = 100(1.05)6 = 134.01.
We will deal with 3 different rates: iNom = nominal, or stated, or quoted, rate per year. iPer = periodic rate. EAR = EFF% = effective annual rate.
iNom is stated in contracts. Periods per year (m) must also be given. • Examples: 8%, Quarterly interest 8%, Daily interest
Periodic rate = iPer = iNom/m, where m is number of compounding periods per year. m = 4 for quarterly, 12 for monthly, and 360 or 365 for daily compounding. • Examples: 8% quarterly: iPer = 8/4 = 2%. 8% daily (365): iPer = 8/365 = 0.021918%.
Effective Annual Rate (EAR = EFF%): The annual rate which causes PV to grow to the same FV as under multiperiod compounding. Example: EFF% for 10%, semiannual: FV= (1.05)2 = 1.1025. EFF% = 10.25% because (1.1025)1 = 1.1025. Any PV would grow to same FV at 10.25% annually or 10% semiannually.
An investment with monthly compounding is different from one with quarterly compounding. Must put on EFF% basis to compare rates of return. • Banks say “interest paid daily.” Same as compounded daily.
An Example: Effective Annual Rates • Suppose you’ve shopped around and come up with the following three rates: • Bank A: 15% compounded daily • Bank B: 15.5% compounded quarterly • Bank C: 16% compounded annually • Which of these is the best if you are thinking of opening a savings account?
Bank A is compounding every day. = 0.15/365 = 0.000411 At this rate, an investment of $1 for 365 periods would grow to ($1x1.000411365)= $1.1618 So, EAR = 16.18% Bank B is paying 0.155/4 = 0.03875 or 3.875% per quarter. At this rate, an investment of $1 of 4 quarters would grow to: ($1x1.038754)= 1.1642 So, EAR = 16.42%
Bank C is paying only 16% annually. In summary, Bank B gives the best offer to savers of 16.42%. The facts are (1) the highest quoted rate is not necessarily the best and (2) the compounding during the year can lead to a significant difference between the quoted rate and the effective rate.
How do we find EFF% for a nominal rate of 10%, compounded semiannually?
EAR = EFF% of 10% EARAnnual = 10%. EARQ = (1 + 0.10/4)4 - 1 = 10.38%. EARM = (1 + 0.10/12)12 - 1 = 10.47%. EARD(360) = (1 + 0.10/360)360 - 1= 10.52%.
Can the effective rate ever beequal to the nominal rate? • Yes, but only if annual compounding is used, i.e., if m = 1. • If m > 1, EFF% will always be greater than the nominal rate.
When is each rate used? iNom: Written into contracts, quoted by banks and brokers. Not used in calculations or shown on time lines unless compounding is annual.
Used in calculations, shown on time lines. iPer: If iNom has annual compounding, then iPer = iNom/1 = iNom.
EAR = EFF%: Used to compare returns on investments with different compounding patterns. Also used for calculations if dealing with annuities where payments don’t match interest compounding periods.
FV of $100 after 3 years under 10% semiannual compounding? Quarterly? mn i Nom FV = PV 1 . + n m 2x3 0.10 FV = $100 1 + 3S 2 = $100(1.05)6 = $134.01. FV3Q = $100(1.025)12 = $134.49.
What’s the value at the end of Year 3 of the following CF stream if the quoted interest rate is 10%, compounded semi-annually? 4 5 0 1 2 3 6 6-mos. periods 5% 100 100 100
Payments occur annually, but compounding occurs each 6 months. • So we can’t use normal annuity valuation techniques.
Compound Each CF 0 1 2 3 4 5 6 5% 100 100.00 100 110.25 121.55 331.80 FVA3 = 100(1.05)4 + 100(1.05)2 + 100 = 331.80.
b. The cash flow stream is an annual annuity whose EFF% = 10.25%.
What’s the PV of this stream? 0 1 2 3 5% 100 100 100 90.70 82.27 74.62 247.59
Amortization Construct an amortization schedule for a $1,000, 10% annual rate loan with 3 equal payments.
Step 1: Find the required payments. 0 1 2 3 10% -1000 PMT PMT PMT 3 10 -1000 0 INPUTS N I/YR PV FV PMT OUTPUT 402.11
Step 1: Find the required payments. PVAn (OA)= PMT(PVIFAi,n) PMT=PVA3 /(PVIFA10%,3) =1000/2.4869 = 402.107
Step 2: Find interest charge for Year 1. INTt = Beg balt (i) INT1 = 1,000(0.10) = $100. Step 3: Find repayment of principal in Year 1. Repmt = PMT - INT = 402.11 - 100 = $302.11.
Step 4: Find ending balance after Year 1. End bal = Beg bal - Repmt = 1,000 - 302.11 = $697.89. Repeat these steps for Years 2 and 3 to complete the amortization table.
BEG PRIN END YR BAL PMT INT PMT BAL 1 $1,000 $402 $100 $302 $698 2 698 402 70 332 366 3 366 402 37 366 0 TOT 1,206.34 206.34 1,000 Interest declines. Tax implications.