The AI trade that seemed unstoppable for much of 2026 just ran into a very large, very immovable wall. Semiconductor stocks across Asia cratered on June 22, dragging regional markets into their worst single-day performance in months.

South Korea bore the brunt of the damage. The KOSPI index plunged nearly 10%, enough to trigger a market-wide circuit breaker. SK Hynix and Samsung Electronics, the two heavyweight chipmakers that anchor the Korean market, each saw their shares collapse by approximately 12%.

From record highs to circuit breakers

Just one day before the crash, SK Hynix had overtaken Samsung as South Korea’s most valuable listed company. The broader Asian tech complex followed Korea downward. Japan’s Nikkei 225 dropped over 3%, while semiconductor-adjacent names in Hong Kong and China also saw notable weakness.

Micron, one of the memory chip sector’s bellwethers, had posted a staggering 230% gain year-to-date before the pullback.

What spooked investors

Three issues converged to break the dam. First, overcapacity fears: the semiconductor industry has a long history of boom-bust cycles where surging demand leads to aggressive capacity expansion, a glut, and then margin compression. Second, rising US interest rates compounded stretched valuations, making expensive growth stocks comparatively less attractive against safer yield-bearing alternatives. Third, there’s growing skepticism about the sustainability of hyperscaler spending from mega-cap tech companies like Microsoft and Google, whose own shareholders are asking pointed questions about returns on massive AI infrastructure investments.

The crypto angle: Bitcoin as a pressure valve

While semiconductor stocks were in freefall, Bitcoin showed notable resilience, even posting modest rebounds during the worst of the equity carnage. That divergence hints at a capital rotation dynamic: when traditional tech equities suddenly look vulnerable, some capital appears to flow into alternative stores of value. Investors who held both chip stocks and Bitcoin saw the latter partially offset losses from the former.