3,026 'Market Alerts' Issued Last Year Amid Stock Market Overheating... Investment Risks Up 230%

Warning Lights Amid a Surge of Short-term Rallies

Herd Trading Driven by Political and AI Themes

The Exchange Strengthens Investor Protection Measures

Last year, due to a sharp rise in the stock market and an increase in overheated stocks, the number of market alert designations exceeded 3,000 cases.

On the 27th, with the KOSPI dropping more than 3% to start below the 5,300 level, the KOSPI and the won/dollar exchange rate are displayed on the status board of the Hana Bank dealing room in Jung-gu, Seoul. Photo by Yonhap News Agency

According to the Korea Exchange on the 27th, the Market Surveillance Committee issued a total of 3,026 market alerts last year, an 11% increase compared to the previous year. Investment cautions rose by 5%, investment warnings by 64%, and investment risks by 230%.

By type, there were 2,598 investment caution alerts. Among these, "Preliminary Investment Warning Designation" accounted for the largest share at 772 cases (30%), and there was a significant increase in alerts designated due to "excessive participation of a small number of accounts in the purchase of stocks that had risen over 15 days."

There were 395 investment warning alerts. Of these, "Short-term Surge," which is designated when a stock rises by 60% over five days, accounted for 171 cases (43%), maintaining the same high proportion as the previous year. Alerts based on "Ultra-long-term Surge and Unhealthy Factors" totaled 105 cases, up 286% year-on-year.

Investment risk designations totaled 33 cases. With the increase in investment warnings and the growing number of stocks that surged again after being designated, "Ultra-short-term Surge (3 days)" represented the largest share with 20 cases (61%).

The main reason for the sharp rise in prices of stocks designated for market alerts was the prevalence of "theme-driven trading." In the first half of the year, following the impeachment crisis and leading up to the presidential election, there was a surge in political theme stocks, resulting in a high proportion of designations related to politicians (369 cases). In the second half, expectations for earnings from deep tech sectors such as semiconductors and artificial intelligence (AI) drove rallies in related stocks, leading to a number of market alert cases for these stocks.

The number of inquiries for disclosure requests due to sudden market fluctuations was 81, a 30% decrease from the previous year. This was largely because the general upward trend of the stock market, rather than specific individual favorable events, drove stock prices higher, reducing the need for the Exchange to request clear reasons from companies.

Among the responses to these disclosure inquiries, 71% stated "No Important Disclosure." This suggests that despite the absence of changes in intrinsic value or significant management information, stock prices experienced volatility due to simple theme-driven trading or herd behavior.

After the issuance of market alerts, stock price increases tended to moderate or even slightly decline, indicating a stabilizing effect. This confirms that the designation helps prevent price overheating caused by speculative trading such as short-term surges, theme trading, and unhealthy transactions. In addition, regardless of whether there was an important disclosure or not, the mere request for a disclosure inquiry had a calming effect on price volatility, helping to quickly stabilize stock prices affected by herd behavior and thereby protecting investors.

The Market Surveillance Committee of the Korea Exchange stated, "In response to changes in the market environment, we will continue to pursue reasonable improvements to the market alert and disclosure inquiry systems to enhance their effectiveness and strengthen trust in the capital market."

This content was produced with the assistance of AI translation services.