economy Ch4part2_by louy Al hami
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Transcript of economy Ch4part2_by louy Al hami
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CHAPTER 4 Part ….2
The Time Value of Money
Created By
Eng. Maysa Faroon Gharaybeh
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Relating a Uniform Series (Ordinary Annuity) To Present and Future Equivalent Values
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1. Finding F given A: • Finding future equivalent income (inflow) value given a
series of uniform equal Payments • F = (4-8)
– uniform series compound amount factor
. – functionally expressed as F = A ( F / A,i%,N ) – predetermined values are in column 4 of Appendix C
of text
F = ?
1 2 3 4 5 6 7 8 A = 0
i
NiA
1)1(
i
Ni 1)1(
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Example 4-7
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See the next slide and get (F/A,6%,40)
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Example 4-8
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2. Finding P given A:
• Finding present equivalent value given a series of
uniform equal receipts
• P = (4-10)
– uniform series present worth factor.
– functionally expressed as P = A ( P / A,i%,N )
– predetermined values are in column 5 of Appendix
C of text
P = ?
1 2 3 4 5 6 7 8 A =
N
N
ii
iA
1
11
N
N
ii
i
1
11
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Example 4-9
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3. Finding A given F:
• Finding amount A of a uniform series when given the
equivalent future value
(4-12)
– sinking fund factor
– functionally expressed as A = F ( A / F,i%,N )
– predetermined values are in column 6 of Appendix
C of text F =
1 2 3 4 5 6 7 8 A =?
11N
i
iFA
11N
i
i
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4. 4. Finding A given P: Finding A given P:
• Finding amount A of a uniform series when given
the equivalent (4-14)
– capital recovery factor.
– functionally expressed as A = P ( A / P,i%,N )
– predetermined values are in column 7 of
Appendix C P =
1 2 3 4 5 6 7 8 A =? 0
11
1N
N
i
iiPA
11
1N
N
i
ii
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5. Finding N when given A, P and i:
• Finding #of periods when given present & annuity value at i% interest rate.
• Using the relationship between P & A
6. Finding N when given A, F and i:
• Finding #of periods when given Future & annuity value at i% interest rate.
• Using the relationship between F & A
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6% 9.8975
i’% 10
7% 10.2598
Linear Interpolation
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Q 4-39 page 197 Q …. A 40-years old person wants to accumulate
$500,000 by age of 65. how much will she need to save each month , starting one month from now, if the interest rate is 0.5% per month ?
Solution …..
(65-40 = 25 years)
N = 12 month × 25 = 300 months
A = F(A/F, 0.5%, 300)
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A = $500,000 (A/F, 0.5%, 300) = $500,000 =
A = (4-12)
A = $720 per month
1005.01
005.0000,500$
300
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Summary
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•
عش كل لحظة من حياتك كأنها آخر لحظة لك في الحياة
عش بالكفاح و التسامح.. عش بالحب و األمل
وقدر قيمــــــــة الحيــــــــــــــــــــــــــاة وتوكل على هللاابراهيم الفقي .د
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Deferred Annuity
• If an annuity is deferred j periods, where j < N
And finding P given A for an ordinary annuity is expressed by: P = A ( P / A, i %, N )
• This is expressed for a deferred annuity by:
A ( P / A, i%, N - j ) at end of period j
• This is expressed for a deferred annuity by:
P0 = A ( P / A, i%, N - j ) ( P / F, i%, j )
at time 0 (time present)
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Equivalence Calculations Involving Multiple Interest Formulas
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• End of Chapter 4 PART 2
• See you next lecture with 4 PART 3
• Don’t, miss it !!!!!