JUN · ISSUE 26 · June 24, 2026
PATTERN · HISTORYWhat history does after a flash crash
Korea fell 10% in a single session. It's not the first time, and the data from those prior times says something worth hearing.
THE CRASH
-10%
Kospi in one session
+3 SESSIONS
+4.5%
average historical bounce
+20 SESSIONS
+6.8%
average recovery
THE NUMBER
+6.8%
↑ 20-session average after a drop of more than 10%
Excluding 2008, double-digit flash crashes have been followed by measured recoveries, not deeper collapses. History rewards the patient, not whoever chases the first green candle.
DATA
ZOOM IN+6.8%
+6.8%
▲ 20-session average after a drop of more than 10% (ex-2008)
It doesn't mean it rises tomorrow: it means selling in panic on crash day has historically been the worst moment to do it.
This is the average 20-session recovery after a double-digit flash crash. The average hides good and bad cases, but the historical tilt is up.
- AVERAGE
- — The mean of several cases; it smooths extremes but hides the spread.
- TILT
- — A statistical lean toward an outcome; here, toward recovery.
QUOTE
AUTHORITYHistory rewards the patient
“After a double-digit flash crash, history rewards the patient, not whoever chases the first bounce.”
The first-day bounce is rarely the real one. The genuine recovery shows up over weeks, not hours.
- BOUNCE
- — A rise after a sharp fall; it can be the real turn or a passing breather.
- RECOVERY
- — A sustained move back toward pre-crash levels.
THE PATTERN
BEFORE AND AFTERFrom panic to recovery, in numbers
The hit lands all at once; the recovery comes in installments. Impatience is what pays the bill.
The crash is violent and immediate; the recovery is gradual. That's why the first bounce misleads and the following month surprises.
- +3 SES
- — Three sessions after the crash: the window of the immediate bounce.
- +20 SES
- — Twenty sessions later: almost a month of trading, where recovery matures.
THE TWO SCENARIOS
BOUNCE vs KNIFEWhat each side is saying this week
THE BOUNCE CASE
Why history is encouraging
- The historical pattern after crashes above 10% is recovery: +4.5% at 3 sessions, +6.8% at 20.
- The selloff is mechanical, not fundamental: negative gamma and forced selling, not bad earnings.
- Brent heading to $70 sinks expected inflation and pushes a rate hike further away.
THE FALLING-KNIFE CASE
Why it can still fall
- Roughly $40B of mechanical pension selling runs until June 30, a daily bearish tailwind.
- Micron earnings and Core PCE are binary: one bad print reopens the drop.
- Below 7,234, strategists see air down to 7,100 with no clear support.
The market sits between two stories. Knowing both keeps you from buying the one you like and ignoring the other.
- MECHANICAL
- — Driven by rules and automatic hedges, not by company value.
- BINARY
- — An event with two opposite, sharp outcomes depending on the print.
- FALLING KNIFE
- — Catching a falling knife: buying a drop that isn't over yet.
BEHIND THE SELLOFF
WHO'S SELLING?Where today's selling came from
$31.7B sold in one session
around $40B through June 30
forced selling on every drop
debt at a record high
Illustrative weights. Almost all the selling is automatic: when it runs out, so does the pressure.
If the selling is machines and rules, not investors fleeing on fundamentals, its force fades when the mechanics fade.
- REBALANCING
- — Periodic adjustment of a portfolio to its target weights; here, quarter-end.
- NEG. GAMMA
- — A dealer position that forces them to sell when the market falls.
WATCHLIST
4 TO WATCHFour gauges of the bounce
| EWY | 62.40 | ▼ -10% | Korea ETF: epicenter of the flash crash and first candidate for the historical bounce. |
| SMH | 238.40 | ▼ -7.9% | Semis: where the bounce would be most violent if the pattern holds. |
| QQQ | 598.20 | ▼ -2.2% | Nasdaq: tells you whether the bounce is broad or stays only in chips. |
| VIXY | 16.80 | ▲ +6.1% | Volatility: rises on the crash; its fall would confirm fear is fading. |
If history repeats, the bounce shows up here first. And a drop in volatility would be the confirmation.
- COUNTRY ETF
- — A listed fund that tracks one country's stock market, here Korea.
- VOLATILITY
- — How much price moves; it rises with fear and falls with calm.
WRAP
FOLLOW USBuy the bounce or wait?
History is encouraging, but this week's catalysts call the shots. We'll follow the thread tomorrow.
One carousel a day, Mon-Fri. Tomorrow another story, another concept.
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- CATALYST
- — An event that triggers a move; here, Micron earnings and Core PCE.
- PATIENCE
- — In markets, waiting for confirmation instead of chasing the first candle.