Why Koreans Lost Almost Everything in the Recent Crash
How two stocks became 60% of an entire index, and took a generation of retail traders down with them.
Two stocks. That’s it. That’s the whole story if you want the short version.
Samsung Electronics and SK Hynix grew so large that by June 2026 they made up roughly 60% of the entire KOSPI index, and together they were responsible for about 70% of the index’s gain in the first half of the year. When a market becomes two stocks wearing an index costume, you don’t need a black swan to break it. You just need those two stocks to stumble.
They stumbled hard.
The numbers, no sugarcoating
The KOSPI had already more than doubled in H1 2026, gaining around 116% at its peak and touching an all-time high near 9,385 in June. Mad bull territory. Then July happened.
From that June peak to the July low, the index fell close to 44%. Measured on the monthly candle alone, it dropped nearly 39%, worse than the COVID crash of March 2020, which “only” took 31% off the top. Seven circuit breakers hit in a single year. Two of them landed back-to-back on July 29 and 30, the first time that’s happened on record.
In just two trading days, July 28 and 29, the market shed roughly $2.18 trillion in value. Samsung and Hynix were regularly posting single-day drops in the 9-12% range during the worst of it.
This is not a dip. This is a market that got taken apart.
Who actually paid for it
Not institutions. Not foreign funds, who had already been quietly heading for the exits. Retail investors. The “ants,” as Korea calls them.
Over 120,000 retail accounts got hit with margin calls. Between 32,000 and 46,000 accounts were completely wiped out. And here’s the part that should make you uncomfortable: investors in their 20s and 30s made up 62% of that group. Young people who bought the AI story on leverage, right at the top.
One brokerage, Korea Investment & Securities, said nearly half of its 880,000 clients holding Samsung shares were sitting on losses. Almost 70% of its SK Hynix investors were in the red too. That’s not a tail-risk event. That’s the median outcome.
The mechanism was leveraged single-stock ETFs, approved for listing on Samsung and Hynix back in May. Assets in these products went from under $10 billion at the start of 2026 to over $50 billion by June, riding the rally straight up. By late July, that pool had collapsed to roughly $16 billion. When leveraged ETFs need to rebalance in a falling market, they mechanically sell into weakness. That’s not a bug. That’s the design. It just doesn’t get explained to retail buyers when the product is being sold to them on the way up.
Over two and a half months, forced liquidations totaled 2.3 trillion won.
Why it broke now
A few things landed close together, and each one made the next one worse:
The AI chip demand story cracked. Markets had priced in near-limitless semiconductor demand off the global AI buildout. Cracks started showing, and the reversal was violent.
Reports surfaced that China had begun mass production of its own DUV chipmaking tools, hitting semiconductor sentiment directly.
SK Hynix posted record quarterly revenue and still missed estimates. Even a record quarter wasn’t good enough for a stock priced for perfection.
The Bank of Korea delivered its first rate hike since 2023, right as sentiment was already cracking.
Margin debt had climbed to record levels heading into the year, so there was a lot of leverage sitting on a hair trigger.
None of these individually should have caused a 40% drawdown. Together, with retail leverage stacked on top, they did.
The part nobody wants to say out loud
Korea’s Finance Minister publicly apologized to parliament over the damage these leveraged products caused to ordinary investors. That’s rare. That’s also an admission that regulators watched this build and let it run, because the rally looked good on the way up.
A market that thrives when one sector does well and collapses when that same sector wobbles isn’t diversified. It’s concentrated risk wearing an index’s clothes. Korea built exactly that, sold leveraged access to it to 20-somethings, and then acted surprised when a semiconductor demand scare turned into a national wealth event.
Despite all of this, the KOSPI is still up around 41.5% year-to-date for anyone who bought at the start of 2026 and held through the chaos without leverage. That’s the detail that gets lost in the panic headlines. Position sizing and no leverage were the difference between “rough year” and “wiped out.”
The takeaway
This wasn’t really a Korea story. It was a leverage story that happened to be denominated in won. Concentration risk plus retail leverage plus a narrative that cracked all did their normal job. They just did it faster and harder than usual because two mega-caps were carrying the entire index on their backs.
If you’re trading concentrated indices anywhere in the world right now, ask yourself the same question Korean retail investors didn’t ask in June: what happens to my position if the one or two names holding this whole thing up have a bad quarter. If you don’t have an answer, you don’t have a position. You have a bet.
White Fang
If this report saved you time or money, you can tip White Fang here- Click Here no obligation, just appreciation.
The real reason is, unlike North Korea which is sovereign, South Korea is a Jewish American side shop. They needed cash for their wars, Korea was the pocket they used at that time, as all other pockets were empty already.