In: Economics
How many years will it take money to quadruple if it earns 10% compounded semi-annually?
5. annual rate = 10% compounded semi annually
Effective Annual Interest rate = (1 + r/n) ^n - 1
where, r = nominal annual rate
N = no of times compounding
= (1 + 10% / 2)^2 – 1
= (1.05 )^2 – 1
= 0.1025 or 10.25 %
With rule of 144,time it takes to quadruple investment = 144 / 10.25% = 14.05 years