South Korea's KOSPI index swung nearly 17% over two days this week — an 8.29% crash on June 8, then an 8.18% rebound on June 9 — wiping out $360 billion in value during the decline. The volatility didn't stop there. Bitcoin dropped to $59,100 after the same US jobs report that rattled stocks, and $1.7 billion in leveraged crypto positions got liquidated. The twin selloffs point to something that's becoming hard to ignore: AI and crypto markets are moving in lockstep.
Why the KOSPI cratered — and bounced
The trigger was a US May jobs report that blew past expectations — 172,000 new jobs versus a forecast of 85,000. That reduced the odds of a Federal Reserve rate cut, sending risk assets lower globally. But Korea had its own problems: retail traders held a record 37.74 trillion won ($25 billion) in margin debt. When prices dropped, forced selling amplified the plunge. Samsung Electronics and SK Hynix, which together drive about 72% of the KOSPI's 92% gain in 2026 thanks to AI hardware demand, took the brunt.
The rebound came just as fast. An Israel-Iran ceasefire de-escalated geopolitical fears, Nvidia's Jensen Huang made positive statements, and US chip stocks recovered. But the whipsaw left traders questioning how much more leverage the system can take.
Broadcom’s forecast hit both AI and crypto
Broadcom reported a weaker-than-expected AI sales forecast, sending its stock down 13% and dragging the US chip index over 10% lower. Since AI-related spending has ballooned to nearly $800 billion in 2026, any sign of a slowdown spooks the broader market. That fear spilled straight into crypto: Bitcoin fell alongside chip stocks, and leveraged long positions got wiped out. The pattern is becoming routine — when AI names stumble, crypto follows.
The AI-crypto link isn't going away
The correlation isn't just about sentiment. Both markets are pricing the same macro narrative: AI investment is huge, which creates inflationary pressure, which delays rate cuts. No rate cuts mean tighter liquidity, which hurts speculative assets from tech stocks to Bitcoin. The KOSPI's composition — heavily tilted toward AI chipmakers — makes it a bellwether for crypto traders watching the same data points.
Next up, the Fed meets later this month. If the jobs report keeps expectations hawkish, another leg down in both AI equities and crypto is a real risk. The forced selling in Seoul isn't done yet either — margin debt is still near record highs.
