日経平均、一時2500円超下落 AI・半導体関連株に過熱感

The Nikkei average experienced a significant decline, falling by over 2,500 yen at one point during trading. This sharp drop is attributed to a cooling-off period in the artificial intelligence and semiconductor-related stock sectors, which had previously seen considerable investor enthusiasm. The market's reaction suggests that some investors are reassessing the rapid valuations of companies involved in these high-growth areas, leading to profit-taking and a broader market downturn.

This event highlights the volatility in high-growth technology sectors and the potential for rapid market corrections as investor sentiment shifts.