Japan's Nikkei Posts Biggest Weekly Drop in Three Weeks After AI Selloff Follows Broadcom Miss

The Quick Take

• Japan's Nikkei posted its biggest drop in three weeks on Thursday as AI stock selling followed Broadcom's revenue miss.
• Investors sold AI-related Japanese stocks as the Broadcom earnings disappointment raised doubts about AI sector valuations globally.
• Renewed Middle East conflict added to negative market sentiment, compounding the AI-driven selloff in Japan.

Japan's Nikkei 225 index experienced its sharpest three-week decline as investors rotated out of AI-related stocks following Broadcom's below-consensus quarterly earnings. The selloff was notable because the Nikkei had recently set an all-time high, making the correction from elevated levels more psychologically significant for Japanese equity investors who had been riding the AI-infrastructure and semiconductor re-rating that characterized the prior rally. Japanese semiconductor-adjacent companies including companies supplying materials, equipment, and specialized components to the global AI chip supply chain were particularly exposed to the Broadcom earnings echo effect. The Middle East conflict created an additional layer of risk-off sentiment that compounded the AI-specific selling.

For Japan's equity market, the correction tests whether the structural re-rating thesis — centered on corporate governance improvements, yen-denominated earnings momentum, and AI supply chain exposure — can survive a US technology sector earnings disappointment. Japanese companies like Tokyo Electron, Shin-Etsu Chemical, and Advantest have been among the largest beneficiaries of the global semiconductor capital expenditure cycle, so any signal that AI chip demand momentum is peaking would have outsized impacts on Nikkei heavyweights. Foreign institutional investors who have been among the most active buyers of Japanese equities in the re-rating trade may use the Broadcom miss as a catalyst to trim overweight positions, particularly given the JPY appreciation risk if BOJ normalizes rates.

Investors should monitor the subsequent trading sessions to determine whether the Nikkei's three-week record decline is a temporary correction or the beginning of a trend reversal. Tokyo Electron's next earnings guidance will be the most direct Japanese semiconductor company data point for validating or challenging the AI supply chain demand thesis. The macro variable is the combination of JPY exchange rate and Federal Reserve policy — a BOJ rate hike alongside continued Fed tightening would strengthen JPY, reducing the yen carry trade incentive that has kept foreign capital in Japanese equities. Tracking net foreign buying data from the Tokyo Stock Exchange will reveal whether institutional selling is accelerating or if domestic buyers are absorbing the correction.

Synthesized from 1 source.