A brutal sell-off in global technology shares on Monday sent shockwaves through financial markets, with AI-linked stocks leading the rout, and a stark warning from BitMEX co-founder Arthur Hayes that a potential AI bubble collapse could drag down the cryptocurrency market.
South Korea's KOSPI index crashed 8.3% in a single session, triggering circuit breakers twice. Japan's Nikkei shed nearly 4%, Taiwan's benchmark dropped 3.5%, and Europe's STOXX 600 fell to a two-week low. The turmoil followed a weak Friday on Wall Street, where the Nasdaq Composite tumbled 4.2% and the Philadelphia Semiconductor Index plunged 10%.
The sell-off was fueled by a rare convergence of macro and micro shocks. Stronger-than-expected US labor data shifted interest rate expectations sharply, sending Treasury yields higher as markets scaled back hopes for imminent policy easing. The two-year yield surged more than 11 basis points in one session, and Fed rate-cut pricing was pushed further out into 2026–2027. At the same time, semiconductor giant Broadcom delivered a softer-than-expected forward outlook, failing to raise AI revenue guidance and rattling confidence in the sector's earnings momentum.
Rising geopolitical tensions in the Middle East added to the risk-off mood. Speculation about a direct confrontation between Israel and Iran sent oil prices soaring, with Brent crude futures climbing above 5% on supply disruption fears. The jump in oil directly fed inflation expectations, compounding rate uncertainty. European airlines like Lufthansa and Air France fell over 2% on higher fuel costs, while the broader market digested the possibility of persistent tight monetary policy.
In a blog post titled "Reality Test," Arthur Hayes outlined a scenario where these oil-price pressures become the catalyst for a broader market correction. He pointed specifically to the Strait of Hormuz, warning that prolonged restrictions there could drive crude and commodity prices significantly higher in the third quarter, fuelling inflation and making energy costs a central issue in the upcoming US midterm elections. Hayes suggested that President Trump might respond by tightening regulations and imposing new taxes on data center investments and the AI industry, popping the speculative bubble in AI stocks.
Hayes then drew a direct line to crypto: a significant downturn in tech stocks would create a risk-off environment that would also hit digital assets. He emphasized that he is not selling his core Bitcoin (BTC) and Ethereum (ETH) holdings, but plans to use derivatives to establish tactical short positions if the scenario materializes. This view underscores the growing sensitivity of both tech and crypto markets to macro drivers like rates, oil, and geopolitical shocks.
Analysts described the sell-off as a structural unwind rather than a fundamental rejection of AI's investment case. "The big surprise is not that we had a selloff, but that we didn't have it before," noted Lars Skovgaard of Danske Bank. Thomas Mathews of Capital Economics pointed out that chipmakers remain profitable and the economy is still healthy, suggesting the drawdown may not be sustained. But the correlation between AI equity valuations and interest rates has tightened, turning them into macro duration proxies. With crucial US inflation data and an ECB rate decision due midweek, and large tech IPOs looming, the near-term path for risk assets remains highly uncertain.
