韩国股市，盘中触发熔断

Core Viewpoint - The South Korean stock market has been a global leader over the past year, but a significant drop on the first trading day of February has tested investor confidence amid concerns over the sustainability of AI-driven spending and uncertainty in the Federal Reserve's interest rate policy [1][5][6]. Group 1: Market Performance - On February 1, the KOSPI index experienced a sharp decline, falling by 5.26% and marking the largest single-day drop since April of the previous year, with a maximum intraday drop of 5.6% [1][4]. - The market's volatility prompted the activation of the "Sidecar" mechanism to curb excessive fluctuations, which halts sell orders for five minutes when the index moves more than 5% [1][3]. - Despite the recent downturn, the KOSPI index has risen over 17% year-to-date, maintaining a strong position among global indices [8]. Group 2: Key Companies - Major semiconductor companies, Samsung Electronics and SK Hynix, saw their stock prices drop by over 6% and 8%, respectively, during the market sell-off [4]. - Oracle's unexpected announcement to raise $50 billion for cloud infrastructure has drawn significant attention, with concerns about potential layoffs and asset sales to address financing challenges [7]. Group 3: Investor Sentiment - Analysts suggest that multiple factors, including anxiety over the nomination of a new Federal Reserve chair and volatility in metal prices, have led to profit-taking among investors [5]. - Concerns regarding the sustainability of AI-related spending have intensified, particularly following Microsoft’s report of stagnation in its Azure cloud business and Nvidia CEO Jensen Huang's comments on investment commitments to OpenAI [6]. - Some optimistic investors view the recent market correction as a necessary adjustment for future growth, asserting that there have been no substantial changes in order volumes or capital expenditures [10].