Nikkei 225 Falls 1.9% as AI Sector Cools

The Nikkei 225 Index closed at 62,797.96 on September 13, 2026. This represents a decline of 1.9 percent. Investor sentiment turned cautious due to concerns over the speed of AI advancement.

Major technology firms have called for a slowdown in AI development. This shift has created uncertainty in the market. Rising oil prices also contributed to the bearish tone.

Topix Index Shows Mild Resilience

The Topix Index ended the session with a gain of 0.1 percent. It closed at 4,031.21. This performance contrasts with the broader decline seen in the Nikkei benchmark.

Analysts point to specific uncertainty about AI deceleration. Yugo Tsuboi of Daiwa Securities noted this factor. He suggested the slowdown may arrive sooner than expected.

Server Makers Face Valuation Scrutiny

Super Micro Computer Inc provides high-performance server solutions. Its market capitalization stands at approximately 26.34 billion dollars. The company serves cloud computing and AI data centers.

The firm trades at a Price-to-Sales ratio of 0.56. This figure is below its historical median. Traditional earnings metrics do not apply due to negative cash flows.

Insider Selling Signals Market Caution

Insiders sold 15.44 million dollars worth of stock recently. This activity occurred over the past three months. Such selling can indicate concerns about future performance.

According to GN auto markets/indices data, eight gurus hold shares. Seven added to their positions in recent quarters. Two trimmed their holdings slightly.