The Rule of 752 & 137
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Cost of weekly purchase
compounded over 10 years
752
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Cost of monthly purchase
compounded over 10 years
173
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Cost of one time purchase
compounded over 10 years
Double it
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Calculations
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Compound Interest Adding PrincipleA = P*((1+r/n)^(nt))-1)*(n/r)
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Solved for index funds compounding weekly for 10 years
A = P*((1+.07/52)^(52*10)-1)*(52/.07)
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Solved for index funds compounding monthly for 10 years
A = P*((1+.07/12)^(12*10)-1)*(12/.07)
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Solved for index funds compounding yearly for 10 years
A = P*((1+.07/1)^(1*10)-1)*(1/.07)
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Inputs
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A (Ending amount)
whatever you want!
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whatever you want!
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r (avg growth rate of index funds)7.00%
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n (compoundings per period for weeks in a year)52
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n (compoundings per period months in a year)12
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n (compoundings per period years in a year)1
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t (number of periods in years)10
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