Group 1 - The core concern in the market is the prolonged disruption of oil supply due to escalating tensions in the Middle East, leading to significant declines in stock indices [2][4] - The Nikkei average index fell sharply, dropping 1857.04 points (3.48%) to close at 51515.49 points, marking a new low since December 30, 2025 [2][4] - Major semiconductor stocks and key retail brands, including Advantest and Fast Retailing, experienced widespread declines as investors shifted towards risk aversion [4] Group 2 - The Nikkei Volatility Index (VI) rose above 50, indicating heightened market anxiety, significantly surpassing the typical threshold of 20 [4] - U.S. President Trump's warning regarding potential military action against Iran if the Strait of Hormuz is not reopened has intensified investor concerns [4]