This Is Money published a piece this week recommending six smaller, lesser-known companies that could, in their words, supercharge a portfolio. The picks skew toward smaller firms, the logic being that smaller companies offer more room to grow than the household names everyone already owns.

That logic isn't wrong, exactly. Smaller companies have historically delivered strong returns over long stretches, and a small-cap allocation can make sense as part of a diversified portfolio. But the word "secret" is doing a lot of work in that headline, and I want to spend a minute on it, because it's the same word that has separated a lot of people from a lot of money over the years.

Nothing listed on a public exchange is secret. These are companies with share prices, filings, analyst coverage, and journalists writing about them. When an outlet tells you it has found secret stocks, what it usually means is stocks you hadn't heard of. That's a different thing, and the difference matters. A company you haven't heard of isn't undervalued by virtue of your ignorance. It's just new to you.

I've been doing this since the late 1980s, and I can tell you the small-cap pitch is one of the oldest in the book, because it contains a real kernel of truth wrapped in a lot of selective memory. Yes, small companies can double. They can also go to zero, and they do it far more often than the big names do, and nobody writes listicles about the six secret stocks that quietly lost 70 percent while you weren't watching. Survivorship bias is a quiet thief.

The math that actually matters is pretty simple. If you put money into six individual small companies, your outcome depends almost entirely on which six you picked. Some will do fine, some will stall, and one or two may do very well or very badly. The range of outcomes is enormous. If instead you buy a broad small-cap index fund, you own hundreds of those companies, and the winners offset the losers automatically. You give up the supercharge and, in exchange, you give up the blowup. For most people, most of the time, that trade is worth making.

Does that mean the article is useless? No. Reading about individual companies is how you learn to read a balance sheet, and smaller firms are often simpler businesses than the giants, which makes them decent classrooms. If you want to take a small slice of your money, money you could lose entirely without changing your life, and buy individual stocks to learn how it feels, I won't stand in your way. I did the same thing at twenty-three with $200 and a library book, and the education was worth more than the returns.

But keep the proportions honest. I've said it before and I'll keep saying it: a bet on a single company is a bet, not a plan. Six bets is still not a plan, it's just a bet with better table manners. The core of your portfolio should be the boring stuff, the broad funds you buy on a schedule and rebalance once a year, whether the headlines are euphoric or grim.

So read the piece. Note the names. Then ask yourself the question that matters more than any pick: if this one goes to zero, does my retirement change? If the answer is yes, it doesn't belong in your portfolio at any size, secret or otherwise.

As always, this is my perspective, not professional financial advice. Your money, your call.