72

if your annual return is X%, it will take Y years to double your money, where X * Y = 72

So, if your annual return is 6%, it takes 12 years to double and 24 years to quadruple  (4 times). 

So to quadruple in 20 years, your annual return has to be around 7.2%. 

That's SP500 index. 

 

所有跟帖： 

• 檸檬算的好。如果有7%的二十年國債我就買了，然後把發的利息再投資才能達到複利 -何時歸故裏- ♀ (0 bytes) () 10/08/2023 postreply 19:45:05

• 謝謝指點！ -加州陽光123- ♀ (0 bytes) () 10/08/2023 postreply 19:59:49