SK海力士年内狂飙240%，韩国交易所罕见警示风险

Core Insights - SK Hynix's stock price has surged nearly 240% this year, prompting the Korea Exchange to issue a rare cautionary alert to investors, indicating that the stock may be overheated [1][3] - Following the alert, SK Hynix's stock dropped 5.4% on Tuesday, marking its largest decline in three weeks [1] Group 1: Stock Performance - As a leading supplier of high-bandwidth memory for Nvidia, SK Hynix's stock has significantly risen alongside AI-related stocks, with an 11% increase on Monday and a cumulative quarterly rise of approximately 70% [3] - The year-to-date increase of 240% for SK Hynix has outpaced the KOSPI index by more than three times [3] Group 2: Exchange Warning Mechanism - The Korea Exchange rarely issues such warnings for large-cap stocks, which are triggered by sudden or unexplained large fluctuations in stock price or trading volume, aimed at advising investors to act cautiously without halting trading [6] - Last month, similar warnings were issued for Doosan Group and Hanwha Ocean, indicating a higher-level alert system that could lead to restrictions on margin trading in more severe cases [7] - During the cautionary alert period, if a stock meets one of eight criteria, such as a 100% increase over three trading days, the exchange will issue an investment warning; a 40% increase over two days could result in a one-day trading suspension [7]