## What is the rule of 70 in investing?

The rule of 70 is a calculation to determine how many years it’ll take for your money to double given a specified rate of return. Investors can use the rule of 70 to evaluate various investments including mutual fund returns and the growth rate for a retirement portfolio.

## What is the rule of 72 in investing?

The Rule of 72 is a simple way to determine how long an investment will take to double given a fixed annual rate of interest. By dividing 72 by the annual rate of return, investors obtain a rough estimate of how many years it will take for the initial investment to duplicate itself. How the Rule of 72 Works

## What is the 78 rule in finance?

Key Takeaways. The Rule of 78 is a method used by some lenders to calculate interest charges on a loan. The Rule of 78 allocates pre-calculated interest charges that favor the lender over the borrower for short-term loans or if a loan is paid off early.