日经平均股指连续3天创新高，报收于4万4768点

Group 1 - The Nikkei average index closed at 44,768.12 points on September 12, marking a continuous three-day rise and setting a new historical high, with an increase of 395.62 points (0.89%) from the previous trading day [2] - The rise in the Japanese stock market is driven by three main factors: sustained buying of AI-related stocks, increasing market expectations for the Federal Reserve to resume interest rate cuts, and the candidacy of former Economic Security Minister Takashi Saito in the Liberal Democratic Party presidential election [2] - The Philadelphia Semiconductor Index (SOX), which has a high correlation with the Nikkei average, has risen for six consecutive days, reaching new historical highs [4] Group 2 - SoftBank Group is collaborating with Oracle on a massive investment in AI infrastructure through the "Stargate" project [5] - As of the end of June, SoftBank's net asset value (NAV) was approximately 32 trillion yen, which is expected to have increased due to the rise in U.S. tech stocks this summer [5] - SoftBank's market capitalization has expanded to over 26 trillion yen [5]