Comments on: The Rule of 72 and Compounding Interest

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By: Dividends4Life

Dividends4Life — Wed, 09 Jan 2008 02:45:41 +0000

That is neat. With cheap hand-held calculators a lot of these rules of thumbs are falling by the wayside.

Best Wishes,
D4L

By: Real World Finance$ | Carnival of Personal Finance Post

Real World Finance$ | Carnival of Personal Finance Post — Mon, 07 Jan 2008 14:03:59 +0000

[…] article on The Rule of 72 was featured on this week’s Carnival of Personal Finance over at Mrs. Micah. Wander over and […]

By: Dan

Dan — Mon, 07 Jan 2008 13:30:38 +0000

Curtis,

The rule of 72 is a great forecasting tool for interest bearing investments that compound, such as bonds and cd’s.

The mathematical equation to determine what an investment will grow to is:

F = P x (1 + r)^n

Where F is the future value, p is the present value, r is the interest rate, and n is the number of years

So, if you invested $10,000 in a CD that paid 5% compounded annually and reinvested all interest payments (paying taxes out of other income), your investment will grow to:

F = 10,000 x (1 + .05)^10 = $16,288.95

By: Carnival of Personal Finance 134: Building on the Basics | Mrs. Micah: Finance for a Freelance Life

Mon, 07 Jan 2008 09:36:51 +0000

[…] from Real World Finance$ has put together a great overview and graphical display of The Rule of 72 and Compounding Interest. The rule of 72 applies to halving or doubling of money. Even if you’re not a numbers geek […]