That Viral "Korean Market Down 75%" Chart Is Fake. Here's How to Spot It in 10 Seconds.

South Korea's stock market had a historically bad day on Tuesday. It did not have a 75% bad day.

If you spent any time on social media today, you probably saw some version of it: a dramatic dark-mode chart of the Korean market, a huge red box, and a number like −75.48%, captioned "HUGE NEWS" and "this is real."

It isn't. Here's what actually happened, why the fake spread anyway, and — most usefully — how to spot this kind of thing yourself in about ten seconds.

This article is for information and education only and is not financial advice.

What actually happened (still dramatic, fully real)

The Kospi, South Korea's main index, fell 10.84% on Tuesday and closed at 6,023.63. Trading was halted for 20 minutes by a market-wide circuit breaker — the eighth this year. The index is now down roughly a third from its June record of 9,114, capping the worst month in its history. The fuse was a Chinese chipmaker IPO that rattled Korea's semiconductor-heavy market — and raised questions that reach far beyond Seoul.

A 10.8% single-day drop in a major national market is genuinely historic. Which raises the obvious question: why fake a bigger one?

Anatomy of a fake

Because outrage scales. The viral versions of the chart typically do one of these:

The "measure tool" trick. Charting apps let you drag a box between any two points — say, a hypothetical fall from the old record to some imaginary floor — and the app helpfully prints a percentage on it. Screenshot that box, crop out the context, and you have an official-looking "−75%" that measures nothing that ever happened.

The missing anchor. Real charts tie every number to an axis and a date. Fakes rely on you reading the big red number and never checking it against the price scale sitting right next to it. In the versions we saw, the axis itself contradicted the advertised figure.

Borrowed credibility. The fake circulated alongside accurate posts using similar dramatic styling — real accounts reported the crash correctly with the same dark charts and warning emojis. Fakes hide in that visual noise. Same aesthetics, different relationship with reality.

And the motive is rarely mysterious: accounts that post fake crashes are usually farming engagement, selling a newsletter, or funneling you into a "free trading signals" group. Panic is a customer-acquisition strategy.