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Nikkei Hits 1.5-Month Low as AI Concerns Drive Selling

By Markets Desk · 2026-09-14 · 2 min read
A traditional Japanese wooden torii gate standing in a misty forest
Illustration: Tradingbird

The Nikkei 225 closed at 63,492.99, marking its lowest level since July 30. This decline followed executive comments suggesting a potential slowdown in artificial intelligence development.

The Nikkei 225 index closed at 63,492.99. This represents a drop of 518.35 points, or 0.81 percent, from the previous session. It is the lowest closing level for the benchmark since July 30. The sell-off was triggered by remarks from top executives at major U.S. artificial intelligence firms.

These leaders suggested that the pace of AI development should be reduced. Investors reacted by selling shares in AI and semiconductor companies. The broader Topix index ended the day at 4,058.21. It rose 29.91 points, or 0.74 percent, as financial stocks offset the tech losses.

AI Leaders Question Development Speed

Dario Amodei, CEO of Anthropic, called for a slowdown in industry-wide AI progress. Sam Altman, CEO of OpenAI, stated he was also considering slowing development. The Nikkei briefly fell around 2 percent in the morning session. This move reflected immediate investor concern over the future of the sector.

Masahiro Yamaguchi of SMBC Trust Bank noted doubts about the actual implementation of such a slowdown. He argued that slowing down could allow China to overtake U.S. firms. He stated that demand for AI capabilities is not expected to stop expanding. Therefore, the market impact may remain limited to short-term adjustments.

SoftBank Shares Fall on IPO Rumors

SoftBank Group ended the day down 10.7 percent at 5,839 yen. The decline followed reports that OpenAI will not go public this year. SoftBank holds a significant investment in the U.S. firm. Analysts cited this specific news as a primary driver for the stock's sharp drop.

Financial Stocks Support Broader Market

Bank and insurance shares posted gains during the session. Investors bought these stocks on expectations of further rate hikes by the Bank of Japan. Higher interest rates are expected to boost the profit margins of financial institutions. This sector strength helped lift the Topix index despite the weakness in technology stocks.

The U.S. dollar traded in the lower 154 yen range. Speculation of a Federal Reserve rate hike supported the currency. However, expectations for aggressive Bank of Japan hikes also weighed on the dollar. Dealers indicated that these competing rate expectations created a mixed signal for the exchange rate. The Nikkei remains sensitive to these global monetary policy shifts.

Based on reporting by mainichi.jp, compiled by the Tradingbird desk.

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