Question 1

What is compounding frequency and why does it matter?

Accepted Answer

Compounding frequency determines how often interest is calculated and added to the principal. More frequent compounding (e.g. daily vs. annually) means interest is added sooner and begins earning interest itself faster, yielding higher returns.

Question 2

What is the Rule of 72 and how do I use it?

Accepted Answer

The Rule of 72 is a quick mental trick to calculate how long it takes to double an investment. Divide 72 by the annual interest rate. For example, at a 12% return, your money doubles in about 6 years (72 / 12).

Question 3

What is the difference between simple interest and compound interest?

Accepted Answer

Simple interest is calculated solely on the original principal sum. Compound interest calculates returns on both the principal and all accumulated interest from prior periods, resulting in exponential growth over time.

Question 4

How does inflation affect my compounded returns?

Accepted Answer

Inflation erodes purchasing power over time. While compound interest increases the numerical value of your money, the real value (purchasing power) will be lower. Subtract the inflation rate from your annual returns to find the real rate of growth.

Question 5

What is APY (Annual Percentage Yield)?

Accepted Answer

APY represents the real annual rate of return, taking into account the effect of compounding interest over the course of a year. It is always higher than the nominal annual rate unless interest is compounded only once a year.

Compound Interest

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