Nikkei 225 Hits Record High Amid AI Stock Volatility

The Nikkei 225 index reached a record intraday high of 66,428.81 on Wednesday, May 27, 2026, fueled by a rally in AI and semiconductor-related stocks including Tokyo Electron and Advantest. Despite the peak, the index retreated to close at 64,999.41, reflecting a marginal gain of 3.32 points. This volatility followed a session on May 26 where the index fell 162.10 points to end a three-day winning streak.

Market movements were characterized by a rotation of capital. While chip-equipment makers provided support, SoftBank Group experienced significant swings, rising 10.91 percent on Tuesday before sliding between 4.3 percent and 7.26 percent on Wednesday. Gains in automakers like Nissan and Honda also countered losses in the financial sector, specifically Mitsubishi UFJ and Mizuho Financial Group.

External factors influenced trading sentiment, including record closing highs for the Nasdaq and S&P 500. Global markets also reacted to falling crude oil prices, driven by optimism over a potential peace deal between the United States and Iran to reopen the Strait of Hormuz. In domestic economic news, the Bank of Japan reported that producer prices rose 3.0 percent year-on-year in April, missing the expected 3.3 percent. Traders remain focused on upcoming U.S. consumer price inflation data and Japanese housing start figures.