The Lawyer Who Beat the Portfolio Manager at His Own Game
In the 1950s, a lawyer was quietly managing his wife's financial affairs.
His wife had a portfolio manager named Robert Kirby at Capital Group. For about ten years, Kirby worked with the husband as his primary contact, making buy and sell recommendations for the wife's account. Kirby was good at his job. He was actively managing the portfolio the way portfolio managers do. Buying. Selling. Adjusting. Optimizing.
What Kirby did not know was that the husband was running a shadow portfolio on the side.
Every time Kirby recommended a buy, the husband would go purchase about $5,000 worth of that same stock in his own separate account. But here is where it gets interesting. Every time Kirby recommended a sell, the husband ignored it completely. He just let everything sit. He was not managing anything. He was buying and forgetting.
The husband eventually passed away, and when Kirby sat down to help settle the estate, he got a look at this secret portfolio for the first time.
He was floored.
The husband's do-nothing account had grown dramatically larger than the wife's actively managed one. Kirby started digging through the positions to figure out why. Most of the holdings looked similar. But then he found it.
Buried in the account was a small position in a company called Haloid. The husband had put roughly $5,000 into it years earlier and never touched it.
Haloid eventually became Xerox. That $5,000 had grown into over $800,000 worth of Xerox stock. Roughly 160 times his original investment. That single position alone exceeded the total value of the wife's entire actively managed portfolio.
Kirby was so struck by this that he wrote about it in a 1984 article in the Journal of Portfolio Management. He called it the Coffee Can Portfolio, a nod to the old practice of putting your valuables in a coffee can and burying it in the backyard. Set it. Forget it. Let time do the work.
What This Actually Teaches Us
There are two things worth taking away from this story.
Selling is often the most expensive thing you do.
Kirby was making smart, well-reasoned sell decisions for a decade. And those decisions cost the wife the Haloid position.
Every time you sell, you are potentially cutting off a compounder before it finishes compounding. The husband's only edge was stubbornness.
He just refused to sell anything and accidentally held one of the great growth stocks of the 20th century all the way to the top.
Your portfolio does not need your attention to grow.
The husband was not a genius. He was not running sophisticated analysis. He was copying someone else's buy list and then going about his life.
The inactivity was the strategy.
Most investors would dramatically improve their returns if they simply made fewer decisions. The urge to tinker, to react, to feel like you are doing something, that urge is one of the most expensive habits in investing.
