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Nikkei jumps 2.5% to three-month high as AI chip stocks lead rally

Nikkei jumps 2.5% to three-month high as AI chip stocks lead rally
Markets · 2026
Photo · Marcus Devlin for Daily Digest Invest
By Marcus Devlin Equities Correspondent Oct 5, 2026 4 min read

Japan's benchmark Nikkei index surged more than 2% on Monday, reaching a three-month high, as investors piled back into artificial intelligence-related chip stocks. The rally followed a strong session on Wall Street on Friday, where weaker-than-expected US jobs data eased concerns about further interest rate hikes by the Federal Reserve.

By the midday break, the Nikkei was up 2.53% at 70,037.61, while the broader TOPIX index gained 1.16% to 4,138.57. The fact that the TOPIX also rose, though by a smaller margin, suggests the move wasn't just a one-stock story—it was a broad-based advance, though tech names led the charge.

Chip stocks lead the charge

The biggest gains came from semiconductor-related companies, which are seen as key beneficiaries of the global AI boom. Advantest, a maker of chip-testing equipment, jumped 4.5%, while Tokyo Electron, a leading producer of semiconductor manufacturing tools, climbed 5.7%. SoftBank Group, which has significant exposure to tech startups through its Vision Fund, added 3.68% as investors leaned back into AI-related plays.

These companies are part of a global supply chain that has been riding a wave of enthusiasm for AI. When demand for AI chips rises, so does the need for the equipment that tests and manufactures them. That makes these stocks highly sensitive to any news that affects the broader tech sector.

US jobs data cools rate hike fears

The catalyst for Monday's rally was Friday's US jobs report, which came in weaker than expected. The data suggested that the US labor market is cooling, which in turn reduces the likelihood that the Federal Reserve will raise interest rates further. Lower interest rates are generally positive for growth-oriented stocks, especially in the tech sector, because they reduce the cost of borrowing and make future earnings more valuable.

This is a reversal from earlier in the year, when strong economic data had investors worried that the Fed might keep rates higher for longer. Now, with the jobs market showing signs of softening, the market is betting that the Fed can start cutting rates sooner rather than later.

The move in Japan also comes against a backdrop of rising bond yields in Japan, which had been a concern for investors. However, the positive global sentiment appears to have outweighed those worries for now.

What it means for investors

For everyday investors, the Nikkei's rise is a reminder of how interconnected global markets are. A jobs report from the US can move stock prices in Tokyo within hours. The rally also underscores the continued dominance of AI-related themes in driving market performance.

However, it's important to keep perspective. While Monday's gain is significant, the Nikkei is still subject to volatility, and AI stocks can be particularly sensitive to changes in sentiment. If the Fed's next moves don't match market expectations, or if AI earnings disappoint, the same stocks that led the rally could just as easily lead a selloff.

For those with exposure to Japanese equities, either through index funds or individual stocks, the key takeaway is that the market is being driven by global tech trends and interest rate expectations. Keeping an eye on US economic data and Fed communications will be crucial for understanding where Japanese stocks might head next.

Investors should also note that the broader TOPIX index rose by a smaller margin than the Nikkei, which is weighted more heavily toward large tech names. This suggests that the rally is still concentrated in a relatively narrow set of stocks, and that smaller companies may not be participating as strongly.

As always, diversification remains a prudent strategy. While AI and tech stocks have been strong performers, they can be volatile. Balancing them with other sectors and asset classes can help manage risk.

Looking ahead, market participants will be watching for any further clues on the Fed's policy path, as well as upcoming earnings reports from major tech companies. The S&P 500's performance last week, which slipped 0.3% despite Friday's bounce, shows that the market is still uncertain about the direction of rates.

In the meantime, the Nikkei's three-month high is a positive sign for Japanese equities, but investors should remain cautious and stay informed about the factors that can quickly change the market's mood.

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