KOS Chairman Margin Call Fails as Liquidity Freezes: 52% Crash

Overview

KOS shares of Chairman Nguyen Viet Cuong were subject to a forced margin sale on October 1, 2026, but zero shares matched due to frozen liquidity. The failed liquidation comes as KOS has lost over 52% in about two weeks, with market cap dropping to roughly VND 3,420 billion. The event highlights extreme selling pressure and a near-total absence of buyers in the HOSE-listed real estate ticker.

Key Facts

• Dai Viet Securities (DVSC) reported a margin call on Chairman Nguyen Viet Cuong’s KOS account on October 1, 2026, but 0 shares matched.
• KOS closed at VND 15,800 on October 1, down 6.8% (the daily floor limit), marking its ninth consecutive floor session.
• Only 2,500 KOS shares traded on October 1, indicating near-zero liquidity.
• KOS has fallen over 52% from VND 32,950 on September 15, 2026, to VND 15,800 on October 1.
• Market capitalization of Kosy dropped to approximately VND 3,420 billion, down more than VND 3,700 billion from mid-September.
• On September 30, Capital Securities placed margin calls on 450,000 KOS shares of Vice Chairwoman Nguyen Thi Hang (Cuong’s wife) and 476,000 shares of Deputy CEO Nguyen Thi Phuong Thao (Cuong’s sister); both matched 0 shares.
• Chairman Cuong completed the sale of 4.3 million KOS shares between August 27 and September 24, leaving him with about 72.4 million shares, or 33.43% of Kosy.

What Happened

Dai Viet Securities (DVSC) published a report on the results of a forced margin sale of KOS shares held by Nguyen Viet Cuong, Chairman of the Board of Kosy JSC. The report stated that the margin call was executed on October 1, 2026, but the number of shares matched during the session was zero. The report did not disclose the number of shares offered for sale. The failure to match occurred as KOS faced massive selling pressure with virtually no corresponding demand.

On the same day, KOS fell by the full daily limit of 6.8% to VND 15,800 per share, its ninth consecutive floor session. Only 2,500 KOS shares were traded, reflecting frozen liquidity. The stock had closed at VND 32,950 on September 15, meaning it has lost more than 52% in about half a month. The market capitalization of Kosy now stands at roughly VND 3,420 billion, a decline of over VND 3,700 billion from mid-September. Separately, on September 30, Capital Securities placed margin calls on 450,000 KOS shares of Vice Chairwoman Nguyen Thi Hang and 476,000 shares of Deputy CEO Nguyen Thi Phuong Thao, both of which also matched zero shares. Chairman Cuong had also recently completed the sale of 4.3 million KOS shares between August 27 and September 24, leaving him with approximately 72.4 million shares, or 33.43% of Kosy. He did not sell the full 5 million shares initially registered due to unfavorable market conditions and unmet agreements.

Market Context

KOS is listed on the Ho Chi Minh Stock Exchange (HOSE) and operates in the real estate sector. The stock’s recent price action has been catastrophic: a 52% decline in two weeks, with nine consecutive floor sessions and negligible trading volume. The broader Vietnamese real estate sector has faced headwinds from tight credit conditions and regulatory scrutiny, but KOS’s liquidity freeze is extreme. The failed margin calls by multiple family members suggest a concentrated ownership structure under severe stress, with no buyers willing to step in even at deeply discounted prices.

Strategic Significance

For long-term investors, the key issue is the viability of Kosy’s ownership and capital structure. The chairman and his family retain a combined stake of over 33% (based on Cuong’s 33.43% alone, plus holdings of his wife and sister), but forced margin calls that cannot execute indicate that lenders may continue to attempt liquidation, potentially leading to further share overhang. The frozen liquidity means any future margin sale could trigger additional floor sessions, eroding minority shareholder value. The company’s real estate projects may also face funding challenges if controlling shareholders are forced to sell assets or if banks tighten credit further. The inability to match even small sell orders raises questions about market confidence and the effectiveness of the exchange’s price limits in a one-sided market.

What to Watch

• Any new disclosures from Dai Viet Securities or other brokers regarding further margin calls on KOS shares.
• The next trading sessions’ volume and price action to see if liquidity returns or if the floor streak continues.
• Kosy’s Q3 2026 earnings release, expected in late October, for clues on project progress and cash flow.
• Regulatory filings on insider ownership changes, particularly if Chairman Cuong or family members sell additional shares.
• Any announcements from Kosy regarding asset sales, refinancing, or strategic partnerships to shore up liquidity.