# Nikkei drops 4% as global AI chip selloff sweeps Asian markets, Kioxia halves from peak > A wave of profit-taking on AI and chip stocks pushed Japan's Nikkei 225 into correction territory on July 17, with memory chipmaker Kioxia shedding 16% in a single session and investors openly questioning whether AI spending can justify elevated valuations. **Meta:** type: event · date: 2026-07-17 · heads: 谁的钱, 什么崩了 · 8 takes · 4 lenses · 5 regions ## Summary Japan's Nikkei 225 fell 4% on July 17, briefly dropping 4,100 points intraday, to close more than 11% below its June record and enter correction territory. Kioxia, Japan's largest memory chipmaker, dropped 16% in the session, halving its market value from the June peak. Tokyo Electron and Advantest also fell sharply in what Nikkei Asia described as an "AI deleverage." Investors in Japan and across Asia questioned whether returns from AI infrastructure spending can justify two years of elevated chip-sector valuations. China's AI shares also retreated, extending a rout that had started on Wall Street. ## The split Japanese financial media centered the story on memory chips, treating the Kioxia rout as a specific valuation correction for a newly listed group. International outlets framed it as a broader global "AI deleverage" linked to Wall Street, with no single catalyst named for the session. ## By the numbers - 4%, Nikkei 225 single-day decline on July 17 - 4,100 points, the intraday low dive by the Nikkei average - 11%, how far below its June record the Nikkei closed - 16%, Kioxia's single-day loss - Halved, Kioxia's market value from its June peak ## Why it matters The selloff drags chipmakers across Japan and China that supply the global AI supply chain, from memory stacks to advanced packaging. A sustained deleverage could tighten the capital available for the next round of fabrication investment at a moment when [TSMC](/zh/n/tsmc-dossier) and rivals are scaling aggressively to meet AI demand. ## What to watch - Whether the Nikkei stabilises or extends declines in coming sessions - Kioxia production and expansion plans as market capitalisation shrinks - Whether Wall Street's AI-sector correction deepens and pulls other Asian tech indices lower - Any earnings guidance from Tokyo Electron or Advantest that signals a shift in chip-cycle expectations ## Regional takes (batched by bias / lens) ### Tokyo-based English daily; focused on Kioxia specifically, with investor skepticism about AI spending returns - **Japan Times** (Japan, en) — Japan Times led with Kioxia's halving market value from its June peak, framing the rout as investors questioning whether the payoff from AI infrastructure spending can justify the lofty valuations built up over the past two years. The outlet provided the earliest verified English-language account of the session. > "Investors are more closely scrutinising global chipmakers as they question whether the payoff from AI spending can justify lofty valuations." Source: https://www.japantimes.co.jp/business/2026/07/17/companies/kioxia-market-value-halves/ ### Tokyo-based pan-Asian financial daily; framed the session as an "AI deleverage" event driving memory chip and broader chip stocks down sharply - **Nikkei Asia** (Japan, en) — Nikkei Asia called the session an 'AI deleverage,' reporting the Nikkei average briefly dived 4,100 points as memory chipmaker and chip stocks tumbled, with Kioxia leading the decline at 16% on the day. The outlet provided the authoritative Japanese-market trading account. > "Nikkei average briefly dives 4,100 points as memory maker and chip stocks tumble." Source: https://asia.nikkei.com/business/markets/japanese-stocks-plunge-as-ai-deleverage-sends-kioxia-down-16 ### Singapore-based forex broker; provided the correction-territory framing and context of how far the Nikkei had fallen from its June record - **EBC Financial Group** (Singapore, en) — EBC Financial Group reported the Nikkei 225 fell 4% on July 17, closing more than 11% below its June record, formally entering correction territory, driven by a global chip and AI selloff. The outlet contextualized the session within the Nikkei's broader decline from June highs. > "The Nikkei 225 fell 4% on 17 July 2026, closing over 11% below its June record as a global chip and AI selloff pushed Tokyo into correction territory." Source: https://www.ebc.com/forex/nikkei-correction-chip-selloff-july-2026 ### unlabelled - **Bloomberg** (United States, en) — Source: https://www.bloomberg.com/news/articles/2026-07-17/chipmaker-kioxia-s-market-value-halves-from-peak-on-ai-selloff - **Vantage Markets** (Global, en) — Source: https://www.vantagemarkets.com/market-analysis/nikkei-225-today-falls-below-65000-chip-selloff-july-17-2026/ - **Investing.com** (Global, en) — Source: https://www.investing.com/news/stock-market-news/china-ai-shares-tumble-as-wall-street-rout-deepens-selloff-across-asia-tech-4797368 - **Invezz** (Global, en) — Source: https://invezz.com/news/2026/07/17/heres-why-tokyo-electron-advantest-and-kioxia-stocks-are-plunging-today/ - **Business Standard** (India, en) — Source: https://www.business-standard.com/markets/news/asian-shares-fall-nikkei-plunges-nearly-6-amid-ai-selloff-west-asia-war-126071700365_1.html ## Across the graph - Related: [[tsmc-q2-profit-jul16]], [[tsmc-arizona-100b-jul16]], [[asia-markets-ai-selloff-jul17]] - Entities: Japan, Tsmc Dossier --- Canonical: https://rbtfl.xyz/zh/n/asia-markets-ai-selloff-jul17