By Yury Zap @ Shutterstock.com

Back in 2006 I was celebrating 20 years of writing Intelligence Report. Debbie and I were in Vermont, and had just visited Vermontโ€™s Authentic Designs to purchase lighting fixtures. The shop uses 150 year-old machines to manufacture colonial and early American lighting fixtures. There, on one of the machines for all the craftsmen to see was taped a sign that read โ€œSimple is Sophisticated.โ€

After reading that taped up sign in Vermont all those years ago, I adopted โ€œSimple is Sophisticated,โ€ as a personal mantra to keep me focused on the essential elements of my investment strategy. The most fundamental of these, and the one I have employed to the greatest benefit to myself, and hopefully to you if you have been a subscriber or client, is compound interest. Below you will read the story of how I have employed compound interest to the benefit of my grandchildren, and how you can do the same. I wrote back in May of 2006:

Rich as Croesus

I want you to begin on your quest for sophistication through simplicity by focusing laser-like on compound interest. Here is an amazing story. I call it my grandchildrenโ€™s โ€œrich as Croesusโ€ strategy. (Croesus was the last king of Lydia from 560โ€“547 B.C.)

When each of my four grandchildren was born, I opened accounts for them at Vanguardโ€™s TaxManaged Growth & Income fund. Each year, I deposit $10,000 (and yes, I know you can now give away $11,000/year tax-free). The money is invested with little in the way of long-term tax implications. Let me show you how compound interest works its magic.

Gettinโ€™ Rich Slowly

If you invest for a compounded rate of return of 10%, itโ€™s easy to think that your long-term return would be twice the return gained by investing at 5%. That is not the caseโ€”not by a long shot. Letโ€™s take a long-term look here, for that is my intention with my grandchildren. Investing $10,000 at 5% for 50 years gives them $115,000โ€”a staggering sum, to be sure. But at 10%, $10,000 grows to a mind-boggling $1,174,000 (thatโ€™s million). Double the growth rate to 20% (admittedly unrealistic, but useful in this example), your $10,000 would become a stratospheric $91 million (over 77 times the return). And you thought you understood compound interest?

You and Counterbalancing

As noted, a 20% annual return year after year is unrealistic. But you can achieve really terrific success, most conservatively, by counterbalancing your portfolio with fixed-income and common stocks. โ€ฆ

In 1989, the editors of Fortune published an article headed, โ€œA Low Risk Path to Profitsโ€ profiling Loews Corp. money manager Joseph Rosenberg. Fortune noted that J.R. believed so fervently in the awesome power of compound interest that he carried a compound interest table in his pocket at all times. Sayeth J.R., โ€œIt is the most important thing in investing.โ€ As the article noted, itโ€™s foolish to undermine the power of compounding by taking big risks that kick you out of the game.

As Rosenberg noted then, compound interest โ€œis the most important thing in investing.โ€ If you want to succeed as an investor for your family, your grandchildren, or yourself, stay focused on the simple, yet sophisticated strategies that really make a difference.

Originally posted on Youngsworldmoneyforecast.com.