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Mark Cuban has blunt advice for anyone with money to invest: Stay away from businesses just about anyone can start. Restaurants, clothing labels, liquor brands — industries with no real barrier to entry. Put your money there, he says, and “that is the death” (1).
That warning resurfaced this week aimed straight at retirement savers, with a simple truth underneath it: A familiar brand isn’t the same as a durable business (3).
I’ve been investing for 45 years, and here’s the thing — a great deal of my profits have come from heeding that simple advice.
Most of the companies I own have a moat: a durable edge competitors couldn’t easily copy. So I don’t just agree with him. I built my investment success on it.
And the data is brutal for the fragile kind. Over nearly a century, just 4% of stocks accounted for all the net wealth the U.S. market created above safe Treasury bills. The other 96% collectively did no better than T-bills (2).
So the question isn’t whether Cuban’s right. It’s whether your retirement is riding on the durable few or the fragile many. Here’s how to check — and what I’d do about it.
1. What Cuban is really warning about
Cuban’s point isn’t about one stock ticker. It’s about the moat — or the lack of one. A company anyone can launch (a restaurant, a clothing line, a liquor brand) has little barrier to entry, so competitors flood in and squeeze out the profit.
The numbers back him up. Restaurant margins are notoriously thin, and a large share of operators aren’t even profitable in a given year (3). A recognizable name on the door isn’t a business that can defend its profits.
2. The good news: You don’t have to pick moats by hand
I picked mine the hard way — one company at a time, hunting for a durable edge. Apple was the first, back in 2001, and I still own some.
Over the years I’ve added a few cut from the same cloth: Microsoft, whose software is wired into how the working world runs; Meta, whose networks get harder to leave the bigger they grow; and Nvidia, whose chips run on software millions of developers already build around.
Disclosure: I own shares of Apple, Microsoft, Meta, and Nvidia. But I’m not recommending you buy them now; most I’ve owned for many years. The point is to give you examples of what a moat looks like.
Here’s the good news: You don’t have to find them yourself. If you own a broad index fund, you already own the moat winners along with everything else, and that durable handful carries the load (2).
You don’t have to guess which companies survive — you own them all. It’s the simplest way to diversify there is, and it requires zero stock-picking.
3. The catch: Do you actually know what you own?
Most people have no idea what’s inside their 401(k). They picked a fund a decade ago and never looked again. If that turned into a concentrated bet on a handful of trendy, no-moat companies, Cuban’s warning is aimed right at you.
Cuban’s own fix for people with money is refreshingly honest: Hire a professional to manage it — and not your buddy, but someone with a real track record handling serious money (1). A good one will stress-test what you actually own for quality and over-concentration.
Self-managed portfolios can leave money on the table. One Vanguard study showed DIY investors turn $500K into $1.7 million over 25 years — while those with advisors reach $3.4 million. You could be missing half your potential wealth.
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Quick aside — most internet financial advice comes from people who weren’t alive during the last recession. I’ve been writing about money for more than 35 years. Want rock-solid advice? Sign up for the free Money Talks Newsletter. Takes 10 seconds. No fluff. No spam.
4. Don’t bet everything on stocks
Even a portfolio full of moat companies shouldn’t be all stocks. Markets can fall hard and fast, and if you’re forced to sell into a downturn, even the best businesses can’t save you.
That’s why I keep plenty of safe, boring cash on the side — money that doesn’t flinch when the market does. The mistake is letting it rot at a big bank earning nothing while you could shield part of your savings somewhere that actually pays.
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5. What Cuban and I both avoid: Chasing the flash
The thread through all of this is the moat. Boring, durable businesses build wealth; flashy, easy-to-copy ones usually burn it. The restaurant with your name on it feels great. It rarely pays.
Warren Buffett got rich on unglamorous companies with deep moats — insurance, railroads, candy. Cuban’s saying the same thing in saltier language. After 45 years of investing, so am I.
The bottom line
Cuban’s warning lands because it’s true: A familiar brand isn’t a moat, and a lot of retirement money is parked in companies that can’t defend their profits. The fix isn’t fancy. Own broad, own quality, keep some ballast, and actually check what you hold.
Do that, and you stop gambling on which flashy name survives — and start owning the durable few that always seem to.
Sources: Yahoo Finance (1); Arizona State University (2); AOL (3).
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