Every rally has its reality check. For the AI trade, June 23, 2026 looks like it.
A report flagging a slowdown in AI memory chip production sent chipmakers into freefall, dragging global equities with them and forcing investors to ask a question they had been largely avoiding: what if hyperscaler demand for AI infrastructure does not keep growing at the pace everyone priced in?
How bad was it
South Korea bore the sharpest pain. SK Hynix and Samsung Electronics each shed more than 10% intraday, enough to trigger a circuit breaker on the KOSPI, the index’s emergency pause mechanism that kicks in when losses become disorderly.
The damage was not contained to Seoul. The Nasdaq 100 fell roughly 2.9%, and the S&P 500 opened approximately 1.3% lower as the selloff crossed time zones. Nvidia and Micron joined their Korean counterparts in the red, reinforcing the message that this was a sector-wide repricing, not a localized shock.
