important calculations in personal finance
DESCRIPTION
this presentation will teach some basic formula's every person should know for his personal finance needs . So that he can calculate some basic things himself .TRANSCRIPT
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Some Important Formula's in Personal Finance
1. Compound Interest : 2. Annuity 3. CAGR
Manish Chauhanhttp://www.jagoinvestor.com
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Compound Interest
This formula is used to calculate future value of One time payment today after some years .
Future Value = Present Value * (1 + rate)^Tenure
Rate = Expected rate of Return
Tenure = Number of years
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Example 1 (Compound Interest)
I want to invest Rs 50,000 in a Fixed Deposit for 5 yrs at 8% rate of return . How much will be the maturity value
Future Value = 50,000 * (1 + .08) ^ 5
= 73466
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Example 2 (Compound Interest)
I want to invest Rs 10,000 in a mutual fund today , How much will it become after 10 yrs , considering the rate of return of 15% . Future Value = 10,000 * (1 + .15) ^ 10 = 40455
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Annuity
This formula is used to calculate the future value when we do investment on a regular basis after a fixed interval . Example
- when we invest in a mutual fund per month through SIP .- When we put money in our PPF account each year .
Formula
Future value= Amount per installment * (1+r) * [(1+r) ^n - 1]/ r
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Example 1 (Annuity)
I want to invest Rs 50,000 in a my PPF account per year for next 15 yrs , How much will it become after 15 yrs , at 8% . Future Value = 50,000 * (1.08) * (1.08 ^ 15 - 1)/.08
= 14,66,214
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Example 2 (Annuity)
I want to invest Rs 1,000 in a mutual fund per month for next 10 yrs , How much will it become after 10 yrs , considering the rate of return of 12% . r = rate of return = 12/12 = 1% (per month) n = number of payments = 12 * 10 = 120 Future Value = 1,000 * (1.01) * (1.01 ^ 120 - 1)/.01
= 232339
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CAGR : Compounded annual Growth Rate
- Used to calculate the annual Return provided by an Investment .- Tool to compare investments - Opposite of Compound Interest
Formula
CAGR = nth root of [(Current Value / Original Investment) -1
n = tenure nth root = to the power 1/n
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Example 1 (CAGR)
I Invested Rs 50,000 in a mutual fund on June 2005 , Its value after 4 yrs is Rs 1,00,000 . What is the annual returns it has provided to me ?
CAGR = [(100000 /50000)^ (1/4) - 1 ]
= 2 ^ .25 - 1= .1892
= 18.92% Annual return
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Example 2 (CAGR)
Which investment is Better ? Investment 1 : 50,000 invested in 2000 became 2,00,000 in 2009 Investment 2 : 10,000 invested in 2004 became 25,000 in 2008
CAGR for Investment 1 = [200000/50000]^(1/9) - 1= 16.65 % CAGR for Investment 2 = [25000/10000] ^ (1/4) - 1= 25.74% Hence , Investment 2 is better than Investment 1 .
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Thanks