How compounding actually works
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History of the compounding concept
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The rule of 72 and mental math
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Compounding in everyday life
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YOUR GOAL
Master of The magic of compound interest
nic Inflation acts as negative compound interest, slowly eroding the purchasing power of your cash.
nic The number 72 is chosen because it has many divisors and closely approximates logarithmic growth.
The 72 rule: The Rule of 72 was first published in 1494 by Luca Pacioli, the Italian mathematician who taught Leonardo da Vinci.
A simplified formula used to estimate the number of years required to double an investment at a fixed annual rate of return. Italian mathematician Luca Pacioli first referenced this doubling estimation method in his 1494 book published in Venice.
Who was the Italian mathematician who first documented the Rule of 72 in a 1494 textbook?
If an investment doubles in 6 years, what approximate annual interest rate did it earn?
What percentage of a portfolio's potential value can a 1% annual fee consume over 30 years?
What is the financial term for compounding that works against you, reducing the value of money over time?
Using the Rule of 72, how many years will it take for an investment to double at an 8% annual interest rate?
How does a 3% annual inflation rate affect the purchasing power of your money over 24 years?
Why is the number 72 used in the Rule of 72 instead of the mathematically precise 69.3?