Japan’s Nikkei share average experienced a sharp intraday reversal on Wednesday, erasing a massive early-session rally to close nearly flat as growing caution surrounding high-flying artificial intelligence stocks prompted institutional selling. The benchmark index touched an all-time intraday record of 66,428.81 during morning trade—surging as much as 2.2%—before aggressive profit-booking dragged it back down to settle at 64,999.41. The broader Topix index felt a heavier impact, shedding 0.52% to finish at 3,918.01, weighed down by a significant retreat in major banking and financial conglomerates.
Intraday Performance Breakdown
| Index | Closing Level | Intraday Peak | Net Change |
| Nikkei 225 | 64,999.41 | 66,428.81 | -0.01% (Flat) |
| Topix | 3,918.01 | — | -0.52% |
Divergent Trends: Chip Giants vs. Tech Conglomerates
The session highlighted a distinct split within the Japanese technology sector, as investors re-evaluated companies that had seen massive, fast-paced gains over recent trading weeks:
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The Semiconductor Pillars: Traditional semiconductor manufacturing and testing heavyweights managed to cushion the index from deeper losses. Chip-equipment giant Tokyo Electron rose 2.1%, and testing specialist Advantest jumped 4.05%, solidifying their positions as the day’s top positive contributors to the Nikkei. Uniqlo parent company Fast Retailing also lent strong support, closing up 3.06%.
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The SoftBank Slide: Conversely, massive profit-taking hit technology investment giant SoftBank Group, which tumbled 7.26%. Despite registering the index’s steepest percentage loss of the day, SoftBank remains up 7.62% for the week, vastly outperforming the broader benchmark’s 2.62% weekly gain.
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Peripheral Tech Retraction: Other data center and infrastructure plays faced sharp corrections. Fiber-optic cable manufacturer Fujikura reversed early gains to finish 3.55% lower, while its peer Furukawa Electric plummeted 6.7%. Memory chipmaker Kioxia also ended the day down 3.06%.
Market Commentary: “Caution has emerged regarding this high-pitched rally. The market actively sold off AI-related shares that expanded too rapidly in the latest sessions.”
— Shunichi Otsuka, General Manager of Research & Strategy, Ichiyoshi Securities
Value Rotates Out as Banks Drag Topix Lower
Beyond tech, the Topix index was dragged down by a broad retreat in traditional value stocks. The Topix value share index slipped 0.85%, notably underperforming the growth share index’s 0.15% dip.
Large-cap financial institutions bore the brunt of this rotation. Sumitomo Mitsui Financial Group and Mizuho Financial Group both fell 1.9%, while Japan’s largest lender,
