Japan MoF official says G7 and G20 see no financial instability risk from AI sell-off

Officials call the global economy resilient even as the Nikkei 225 logs its third-largest single-day point drop on record

Japan’s Ministry of Finance has a message for anyone watching AI stocks tumble: the grown-ups in the room are not panicking.

A ministry official said there are no concerns that the AI-driven sell-off will trigger financial instability. The official added that the global economy remains resilient.

On October 15, 2026, the Nikkei 225 fell 4.9%, or 3,318 points, to close at 64,425.95. That marked the index’s third-largest single-day point drop in history.

The damage clustered in the names most tied to the AI and chip trade. Advantest, Tokyo Electron, SoftBank Group and Kioxia all posted heavy declines.

Two forces drove the sell-off. The first was rising anxiety over corporate debt, with particular focus on AI cloud provider CoreWeave, where climbing bond yields fed broader market jitters. The second force came from the US, where inflation data showed a year-over-year rate of 3.7%.

The pain was not confined to Japan. Asian markets broadly declined, while the Japanese yen strengthened slightly as investors moved toward safe-haven assets.

Finance Minister Satsuki Katayama said G7 and G20 finance ministers did not view the AI-linked stock market turbulence as a threat to global financial stability.

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Rather than fixating on falling share prices, G7 discussions have leaned toward cybersecurity threats posed by advanced AI frameworks.

Katayama stressed the need for coordination among G7 and G20 nations to address the risks AI poses to financial systems.

The IMF’s financial stability report warned that an AI share-price correction could send ripple effects across the global economy. The IMF flagged Asian markets as particularly vulnerable.

Policymakers are grappling with enormous capital expenditures across the AI sector. CoreWeave’s debt worries capture the dynamic: building data centers requires huge amounts of capital, and when the cost of that capital rises, the math behind the whole project gets tighter.

For investors, the official reassurance addresses systemic risk rather than portfolio risk. A finance minister saying the global financial system will hold is not the same as saying chip stocks have found a floor.

The yen’s slight strengthening reflects a flight to safety, and it can add pressure on Japan’s export-heavy companies at the same time their shares are already falling.

Katayama’s call for G7 and G20 coordination hints at where the regulatory conversation is heading. The focus on cybersecurity and cross-border cooperation suggests officials want guardrails around AI’s role in finance, even as they downplay the immediate market turmoil.

The key variables to watch are US inflation prints, the direction of interest rates and credit conditions at heavily leveraged AI infrastructure players like CoreWeave.