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How long does it take for an investment to double in value if it is invested at 17​% compounded quarterly?Compounded​ continuously?

 Dec 9, 2016
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For compunding QUARTERLY the QUARTERLY (periodic) interest rate would be 17%/4 = 4.25%   (i= .0425)

 

then    FV = PV (1+i)^n       we want to double PV    ...or  FV = 2

             2 = (1+.0425)^n

           LOG (2) = n LOG (1.0425)

              n= 16.653    PERIODS        Period is 3 months       16.653 x 3 =49.96 months = 4.16 years

 

For CONTINUOS COMPOUNDING      FV = PV e^(rt)          r= .17  

                                                                 2 = e^(.17 t)

                                                               ln(2) = .17t

                                                                 t= 4.07    years        (it would double about 1 month earlier than the first example)

 Dec 9, 2016

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