[Disclosure] SK square (402340) Hit with ‘Investment Warning Notice’ After Explosive ‘200%+’ Surge Over the Past Year

Source Fact: Financial Supervisory Service Electronic Disclosure System (DART) / 2025.12.09

Disclosure Type: Notice of Investment Warning Stock Designation

💡 3-Second Summary

Following a stellar year-over-year vertical rally of over 200% combined with high trading concentration in select accounts, the Korea Exchange (KRX) has placed SK square on a watch list, issuing an “Investment Warning Notice.” The stock will be designated as an “Investment Caution Stock” for one day on December 10, prior to a potential upgrade to a full warning status upon further spikes.

📊 1. [Summary of Core Disclosure & Key Figures]

• Target Asset & Notice Date: SK square Common Stock (Ticker: A402340), designated as an Investment Caution Stock for a one-day period on December 10, 2025.
• Reason for Notice: The closing price on December 09, 2025, surged by 200% or more compared to the prior year, satisfying the high concentration criteria where the top 10 accounts heavily participated in the buying volume for 4 or more days within a 15-day window.
• Surveillance & Judgment Period: Rolling daily from the initial judgment date on December 10 through December 23, 2025, to determine whether to apply the formal warning designation.
• Formal Warning Designation Criteria: The stock will be upgraded to an “Investment Warning Stock” the following day if it simultaneously satisfies all three of these conditions on any given day (T) during the period:
  1. Closing price rises by 200% or more compared to the same day last year.
  2. Closing price marks the absolute highest within the recent 15 trading days.
  3. The top 10 accounts maintain high buying participation for 4 or more days out of 15.

📈 2. [Expert Insight: Market & Share Price Impact Analysis]

• Short-term View (Yellow Card Effect, Cautious Buying and Profit-Taking): The designation notice acts as an official yellow card from financial regulators. While it does not immediately halt trading or lock margin credit, a subsequent promotion to a full “Investment Warning” will trigger strict restrictions, including a 100% upfront cash deposit requirement. Consequently, short-term institutional players or momentum traders may voluntarily slow down their buying pace or lock in profits to prevent cross over the threshold, capping short-term upward mobility.
• Long-term View (Cooling Down Technical Overheating, Re-anchoring to Fundamentals): The 200% surge over the past year is fundamentally backed by the massive turnaround of its sub SK hynix and escalating AI infrastructure tailwinds. However, the regulatory red flag on high account concentration implies that short-term technical froth has embedded itself into the rally. This administrative warning will serve as a cooling mechanism. Over the long run, the stock is expected to shake off technical distortions and realign with its structural Net Asset Value (NAV) expansion.

📝 Editor’s Comment (by K-STOCK Editor)

While registering a 3x gain in a year is a phenomenal milestone, the market watchdog flashing a warning sign shouldn’t be overlooked. The disclosure points out that a minor cluster of 10 accounts has significantly influenced price discovery over the past 15 days, indicating that the current pricing environment is partially driven by concentrated speculative flows. With the review window wide open from December 10 to 23, any fresh 15-day price peak will immediately snap the restrictive “Investment Warning” shackles into place. Rather than giving in to unconditional FOMO and over-leveraging into this trend, it is highly recommended to manage downside exposure as regulatory compliance risks enter the fray.

📢 Disclaimer & Source Information

Source: This content has been structured and newly written based on official disclosure data submitted to the Financial Supervisory Service (DART).

Investment Risk Notice: This information is provided solely for informational and educational purposes. Under no circumstances does it constitute financial advice or a recommendation to buy or sell specific stocks. All investment decisions and financial responsibilities rest entirely with the investor.

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