The Nikkei 225 index experienced a significant surge, at one point exceeding 1,600 points, driven by gains in AI chip stocks such as Advantest. The rally was reportedly fueled by a US tech rally and falling oil prices, with some outlets noting the index reclaimed the 69,000 mark. However, the extent of the surge and the closing value of the index are unclear, with various reports citing different point gains, including 1,199, 924, and 813.