- The Nikkei 225 index rose 0.40% on Wednesday, closing at 59,585.86 points amid volatile trading. At one point, it had fallen 0.6%. The unilateral surge in core technology stocks supported the benchmark index to reach a new historical closing high. Meanwhile, the TOPIX fell 0.67% to 3,744.99 points, significantly exacerbating the market's structural differentiation.
- SoftBank Group (9984:JP) and Advantest Corporation (6857:JP) recorded gains of 8.47% and 2.57%, respectively. Together, these two stocks contributed approximately 522 points of upward momentum to the Nikkei index. Daiwa Asset Management noted that the market breadth had narrowed extremely, with 182 constituent stocks of the Nikkei falling and only 41 rising.
- JPMorgan (JPM:US), citing the expansion of capital expenditure in the AI industry and the weak yen exchange rate as macro benchmarks, significantly raised the year-end target for the Nikkei index to 70,000 points. Meanwhile, the outlook for the extension of the ceasefire agreement between the United States (US) and Iran faces uncertainty, continuing to suppress risk appetite for non-technology assets.
Index Divergence and Microstructure
On Wednesday, Japan's stock market exhibited extreme microstructural divergence. The Nikkei 225 index, representing large-cap blue chips, diverged from the broader market performance represented by the TOPIX. This divergence reflects the current concentration of capital in a few leading companies with global pricing power in the AI industry chain. In the Nikkei 225, over 80% of the constituent stocks declined, indicating that the broad market's profitability is rapidly diminishing. If the global tech stock valuation expansion cycle stalls, this top-heavy index structure may cause Japan's benchmark index to exhibit higher downside volatility when faced with external liquidity shocks.
AI Pricing Logic
The strong performances of SoftBank Group and Advantest Corporation further confirm that AI infrastructure construction remains the most certain trading theme in the current Asia-Pacific market. SoftBank's over 8% increase reflects market reevaluation of the potential value of its asset portfolio in AI computing power and applications. Advantest, as a leading global supplier of semiconductor testing equipment, benefits directly from the growing demand for high-bandwidth memory and advanced process chip yield tests. Market funds are currently rigorously screening based on performance accountability, and the valuation premium space for non-AI-related tech stocks has been significantly compressed.
Foreign Investment Bank Target Reassessment
JPMorgan raised the year-end target for the Nikkei index from 61,000 points to 70,000 points, and also raised the TOPIX target to 4,300 points. This action highlights international capital's optimistic pricing of Japan's balance sheet expansion. The investment bank's rationale for the upward revision is based on two pillars: the sustainability of global AI capital expenditure and the performance-enhancing effect of the weak effective real exchange rate of the yen on export-oriented tech companies. However, the target increase also implies the assumption of continued advancements in Japanese corporate governance reform. If corporate buyback sizes or dividend payouts fall short of expectations in the coming quarters, the momentum of long-term foreign capital inflows might experience marginal decay.
Pressure on Consumer and Export Sectors
Amid the tech stock frenzy, traditional consumer and manufacturing sectors are facing deep adjustments. San Miguel Holdings (2501:JP) announced its exit from the U.S. craft beer business, selling Stone Brewing only four years after acquisition, leading to a 5.2% drop in its share price, making it the worst-performing Nikkei constituent stock. This setback in cross-border acquisitions reflects the high integration costs and market acclimatization challenges faced by Japanese domestic demand enterprises when expanding overseas. Meanwhile, Nikon (7731:JP) and Yokohama Rubber (5101:JP) fell by 4.4% and 3.8%, respectively, demonstrating that in traditional precision optics and automotive components lacking AI narrative support, the weakening global macro demand is gradually being priced into corporate profit expectations.
Marginal Disruption from Geopolitical Risks
The statement by United States President Trump about extending the ceasefire arrangement with Iran did not effectively alleviate market risk aversion. As significant uncertainty remains about whether Iran or Israel will accept the extension, the tail risk of Middle East geopolitical tensions continues to loom over global energy pricing and supply chain security. For Japan's economy, which is highly reliant on energy imports, geopolitical friction could not only raise imported inflationary pressures and squeeze corporate midstream profit margins but could also drag down traditional manufacturing exports by suppressing global aggregate demand. This macro uncertainty is one of the core reasons leading to a systematic sell-off of non-tech stocks in the market.
