Reuters published a piece last week that I've thought about several times since reading it. It's about South Korea, and about what happens to people after a speculative frenzy dies down. Not what happens to their portfolios, although that's part of it. What happens to them. You can read it here.

The short version, per Reuters, is that the trading frenzy created an investor trauma that could take years to shake. Retail investors piled in during the mania, many of them borrowing to do it, and when the music stopped they were left with losses they'll be working off for years. The emotional residue, the piece argues, may outlast the financial damage. That framing rings true to me, and it's the part I want to sit with.

I'm 62. I've watched this movie enough times to know how it ends, and I still can't look away.

1987. The dot-com bubble. 2008. My own recollection of every one of them is the same aftermath: plenty of investors who swore off stocks entirely, sometimes for a decade or more, and who paid a real price for that too. Because the damage of a mania isn't only the money lost at the bottom. It's the years spent on the sidelines afterward, out of the market, while compound interest did its quiet work for everyone who stayed.

Let me run the math, because this is the part nobody in the frenzy ever does. Say a 32-year-old Korean investor put the equivalent of $30,000 into hot stocks at the peak and lost 70 percent. That's $21,000 gone. Painful. Now say the experience sours her on stocks completely and she sits in cash for 15 years, from 32 to 47. Assume the market's long-run nominal return of about 8 percent a year, a standard assumption and still just an assumption. That $9,000 remainder would have grown to roughly $28,500 if she'd simply owned a boring index fund. The second loss, the invisible one, ends up bigger than the first, and that's the part that gets me.

And the emotional toll compounds too, which is the point of the Reuters piece. Fear after a crash feels like wisdom. It isn't. It's just fear in a nice blazer.

Now, to be fair to the Koreans in this story, they had less help than most. A hot retail-trading culture, easy access to leverage, social media amplifying every winner and burying every loser. I wrote earlier this month about Korean retail money flowing back into U.S. stocks as the KOSPI slid, and the pattern is familiar: capital chasing whatever worked most recently, in either direction. When markets run hot, the mania looks like participation. When they turn, the same behavior looks like gambling. It was always gambling. We just label it by the outcome.

The lesson in here for the rest of us is an old one. The people getting hurt worst in these stories are rarely diversified index investors losing 15 percent in a bad year. They're concentrated, leveraged, momentum-chasing traders losing 70 or 80 percent in a bad month. The difference between those two experiences isn't luck or skill. It's structure. Own broad chunks of the market, avoid borrowing to invest, keep buying through the cycles, and a crash becomes an unpleasant chapter instead of a life event.

If this mania cost you, or someone close to you, I'd offer one thing I've learned the slow way. Don't let the crash make your decisions for the next decade. Selling everything and never coming back doesn't undo the loss. It just locks in a second one.

As always, I'm sharing perspective here, not professional financial advice. Talk to someone qualified before making big moves, especially when the decision is being driven by fear.