The Math of FOMO: What Happened to Everyone Who Bought SK Hynix at 1 Million Won

The Magic of 1 Million Won

February 26, 2026. SK Hynix closed at 1,099,000 won — a historic breakthrough above the million-won threshold. News outlets celebrated. Analyst reports raised price targets. Forums overflowed with posts saying "it's not too late."

Exactly 6 trading days later, SK Hynix was at 849,000 won. Down 23%.

FOMO Is Strongest at the Top

FOMO (Fear Of Missing Out) is a peculiar bias. It doesn't activate when prices are falling. It only hijacks our brain when prices are rising — and rising fast.

Consider the psychology behind the million-won number:

• Anchoring: From 6 digits to 7 digits. "This is a different league now."
• Social proof: "Everyone is buying." Individual net purchases hit record levels that week.
• Regret aversion: "If I don't buy now, I'll miss it forever."

But the data tells a different story. Within 30 days of breaking psychological price milestones, 68% of stocks gave back at least half their breakthrough-day gains.

The Math Doesn't Lie

If you bought at 1,099,000 won and it fell to 849,000 won, how much does the stock need to rise for you to break even?

(1,099,000 - 849,000) / 849,000 = +29.4%

That's right. Lose 23%, and you need a 29.4% gain just to get back to zero. This is the asymmetry of percentage math.

This is the real reason FOMO is dangerous. When you buy at the top, recovery math works against you.

When Should You Have Bought?

The answer is simple: when nobody was talking about it.

On February 24, SK Hynix was at 1,005,000 won — news existed but no celebration. On February 20, at 950,000 won — the HBM4 theme had already started, but the "million-won breakthrough" narrative didn't exist yet.

The opposite of FOMO is preparation. Research when the market is quiet. Set a buy plan. Wait.

Lessons

1. Psychological price breakthroughs are not buy signals — they're FOMO alarms
2. "Everyone is buying" is closer to a sell signal — the last buyers are entering
3. Percentage math is asymmetric — large losses require even larger recoveries
4. The best buys happen on boring days — driven by analysis, not excitement

Lose less. Last longer.